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 A HISTORY OF SUSSEX mined. Judging from memory however they corresponded precisely with Chun's figure of P. rhodopis, and cannot be referred to the balloon-shaped Hor- miphora plumoia. Length, about if inches. Hastings. 76. (?) Horniiphora plumoia. Specimens resembling this genus in shape and somewhat larger than Pleurobranchia pileus have been taken at Hastings, but were not examined sufficiently for identification. Hastings. 77. Bero'i ovata, Eschscholtz. This species is filbert-shaped, and has been taken in the immature condition. Specimen transparent, colourless, | inch in length. In this genus the circulatory canals unite at the aboral pole, and in the region of the pores there are ciliated ten- taculoid processes, lobed and branched. Hastings. VERMES CEPHYREA 1. Sipunculus, Pallasii.t Brighton. ANNELIDA HIR U DINE A 2. Pontohdella muricata. This species has suckers at both extremi- ties ; there are neither feet nor bristles. The rings are strongly marked, and are studded the whole way round with conical warts, each ring somewhat resembling a well-armed dog collar. Colour, a dull bufF with spots of brown at regular intervals. Trawled ; rare. Hastings. POLYCHMTA AURICOMID^ 3. Pectinaria helglca. This species forms beautifully made sand tubes, the sand grains being cemented together by an excretion, the structure resembling mosaic work. The tubes are straight, conical, and very regular. Com- mon. Hastings. 4. Pectinaria arenaria.f Brighton. 5. Sahellaria crassiss'tma. Link.* Very common. Hastings. 6. (?) Sahellaria alveolata.* Common. Hastings. 7. Siphonoitoma, sp. Specimen about 2^ inches in length, greyish-brown in colour ; much enlarged towards the head. The setas become very long in the region of the mouth and project in front. The body is covered with small papillae. Trawled. Hastings. Terebellid.5: 8. Terehella lit tor a lis, Dal. This species, in the adult state, forms membranous tubes with agglutinated par- ticles of sand and shell. The tubes are of considerable length and have a fringe of smaller branching tubes arranged in a radiating manner around the anterior end. Very common upon the shore. Hastings. 9. Terehella maculata.* Hastings. 10. Terehella conchilega. Brighton. Sabellid^ 1 1 . Sahella penicillus.* Hastings. 1 2. Sahella tuhularia.* Hastings. 13. Myxicola infundihulum. Animal white, i^ inches long, tapering to the posterior end, and with a slight depressed line running down the dorsal and ventrical sides. Setse minute. The pectinated plume-like gills are arranged around the mouth, and curve gracefully over towards the centre. Trawled ; rare. Hastings. SERPULIDi* 14. Serpula contortuplicata. Annelid forming a calcareous tube, cir- cular in section, much twisted and often aggregating together in involved masses. Animal with a flat-topped operculum. Very common upon shells and rock. Hastings. 15. Serpula triquetra. This species inhabits a calcareous, ser- pentine tube cemented to shells and stone. Running down the back of the tube is a ridge or keel, and the base of attachment is spread out, so that a section would be somewhat triangular in form. The oper- culum is conical and generally furnished with two or three spines. Very common. Hastings.