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 A HISTORY OF SUSSEX EOLIDID^ 1 60. Eo/ts papi/Iosa, hinnieus. A fine species, and one that is always in summer to be found on our coast. Length, about 2 inches. The body is flesh- coloured, powdered with opaque white ; the papilla, which well clothe the sides, are somewhat lanceolate in form and are usually of a seaweed green finely speckled with opaque white. The colours however run through many gradations, as is seen in years of great abundance, when all shades of grey, green, orange, brown and brown- purple make their appearance. Habitat, along the shore under stones and crawling upon mud and sand. Common. Hastings. 161. ^o/ide//a alden, (?) Cocks [} glauca). A single specimen taken upon Lepralia foliacea from moderately deep water appears almost intermediate in character between this species and Molidella glauca. In form perhaps the specimen approaches nearer to /£. alderi, but in colouring, size and habitat approximates to M. glauca. Length of specimen I inch, extending when crawling to I inches. The papillae are neither ' vermicular ' nor ' clavate,' but are thickest at about the middle, slightly conical at the apex, where there is in many cases a small pimple-like in- flation of the outer membrane. Under magnification the internal gland is of a seaweed green-brown, the sheath and apex being pellucid white superficially and inde- finedly banded with opaque sage-green paling to white, with a glow of orange upon the upper portions. The papillae of the front row are semi-transparent white. The oral tentacles are a little longer than the dorsal ones, and are lightly tinged with orange ; the latter are linear and obtuse at the apex and of a bright orange colour tipped with white. The tail is short and not very pointed. From the veil, and ex- tending midway down the back, the colour is a bright orange, paling towards the middle of the back. Hastings. 162. Cuthona aurantiaca. Alder and Han- cock. Animal ^ inch in length. The papillae are rather long ; gland of a rosy orange colour finely granulated with red. The apex and sheath are semi-opaque blue- white ; below the apex and internally is a zone of opaque white granules ; above this zone and overlapping it somewhat is a surface colouring of orange, toning down to yellow. Of the oral tenta- cles, the sheath is transparent, colourless, and the core semi-opaque white, rather defined. This species bears some resem- blance to the following species, but may be distinguished by the absence of foot pro- cesses, and by the presence of an orange- coloured zone near the apex of the papillae. Upon water-logged timber ; trawled ; rare. Hastings. 163. Cratena concmna. Alder and Hancock. Length of specimen ^ inch. The papillae are often carried bent ; they have a sheath of blue-green or bottle-green, the gland being orange coloured, or brown- ish-orange speckled with dark brown ; but very characteristic is a crown around the apex, formed of linear opaque white gran- ules, arranged perpendicularly to the surface. These are generally very strongly marked, but are occasionally absent, or nearly so. The foot has two blunt processes. Rare. Hastings. 164. Tergipei despectus^ Johnston. This little species is barely inch in length, and when met with cannot be confounded with any other. The body is semi-transparent white, with a tinge of red in front of and behind the dorsal tentacles. Upon either side of the back and arising from a central vessel are tiiree or four club-shaped papillae, with glands of a mottled seaweed-green colour, and apices of opaque white. The only habitat is upon shore hydroids, particularly OhcHa gclatinoia and 0. gnilculata, where it will probably be first detected by the little globular masses containing the eggs which are deposited upon the stems. It may be noted that the papillae of this little creature, when gliding over the stems of the hydroid, bear a striking resemblance to the egg cap- sules of the latter, and hence may reap some immunity from danger. During some years this species is very plentiful. Hastings. 165. Galvlna cingulata. Alder and Han- cock. Animal ^ inch in length, long and slender and with very tapering tail. The character of the papills in this species has very faithfully suggested a comparison to the quills of the ' fretful porcupine.' In the Hastings specimens there arc eight rows of papills, each papilla having three surface bands of a marbled scaweed-grcen colour; above these is one of opaque white.