Page:VCH Lancaster 1.djvu/221

 CRUSTACEANS C. elliptica from ponds in Lancashire, and Candona reptans as found at Scaris- brick/ all these being, like his Cladocera, freshwater species. The first of them is now called Notodromas monacha (O. F. Miiller). Cypris minuta (Baird) is recognised as a synonym of Cyclocypris Icevts (O. F. Miiller) ; C. elliptica (Baird) retains its name, but Baird's Candona reptans has been transferred to the genus Erpetocypris (Brady and Norman), its generic and its specific name now alike pointing to the fact that this species has lost the power of swimming, and is content to crawl and creep. Cypris obliqua (Brady) has been taken by Dr. Brady in High Cross Tarn, Coniston.^ All the preceding species belong to the family Cyprididae. In the family Cytheridae, Lancashire has several species of the genus Cythere (O. F. Miiller), namely, C. lutea (Miiller) from Scarphole Scar, near Duddon ; C. pellucida (Baird), described by Brady and Norman as essentially a brackish-water species, obtained by Mr. Andrew Scott at Piel ; C. gibbosa (Brady and Robertson) from the same locality ; and C. Robertsoni (Brady) from the mussel beds at Morecambe. Cytheridea elongata (Brady) was obtained at Morecambe by Scott, and C. torosa (Rupert Jones) by Dr. Norman at Crossens.' Loxoconcha impressa (Baird) is recorded by Scott from Piel ; L. guttata (Norman) from Morecambe ; L. tamarindus (R. Jones) from Piel and Duddon ; this species having been also earlier supplied to Brady by Mr. E. C. Davison from the River Ribble.* Cytherura sella (Sars) is reported by Scott from Piel and Morecambe ; C. striata (Sars) from More- cambe ; C. angulata (Brady) from Piel ; C. nigrescens (Baird) from Piel ; C. cellulosa (Norman) from Morecambe. Cytheropteron latissimum (Norman) is recorded by Brady as found by E. C. Davison ' in shell-sand from the River Ribble,' ^ and C humile (Brady and Norman), described by those authors as ' a most remarkable Httle species, on account of the excessive width as compared with the height,' ^ is recorded by A. Scott from near Piel. Sclerochilus con- /or/aj. (Norman) was found by Scott in the mussel beds of Piel, Duddon, and Morecambe ; Cytheridea subulata (Brady) at Piel ; and of the family (or sub- family) Paradoxostomatids the same author has found Paradoxostoma variabile (Baird) at Duddon, and at Piel P. abbreviatum (Sars), and P. Jlexuosum (Brady). All these species belong to the section of the Ostracoda called Podocopa, a tribe in which there is no heart. The species obtained by Mr. A. Scott from the mussel beds at Piel, Duddon, and Morecambe were identified for him by his father, the veteran expert in Entomostraca, Dr. Thomas Scott, LL.D., F.L.S.''' On some of them Mr. Andrew Scott has since published remarks of his own. Of Cythere pellucida (Baird) he says : ' This form is very abundant, especially during the summer months, on the muddy sandy flats along the coast ; common on the mud flats near Piel practically throughout the year.' Of C. porcellanea (Brady) he says : ' Usually associated with C. pellucida ; some care has to be taken in identifying the two forms owing to the amount of variation that occurs amongst the two species ; in the same locality as the last.' Upon C. gibbosa (Brady and Robertson) he remarks : ' This ostracod is frequently found in gatherings from the mud flats left dry by the receding tide ; associated with C. pellucida and G. porcellanea, but is easily distinguished from either of 1 Tama of Liverpool, 54. ^ Trans. Royal Dublin ^oc. (Ser. 3), iv. 77 (1889). s Op. cit. p. 175. * Monograph of British Ostracoda, Trans. Linn. Soc. Lond. xxvi. 436 (1868). 6 Op. cit. p. 448. * Trans. Royal Dublin Soc. (Ser. 2), iv. 220. ^ Trans. Liverp. Biol. Soc. x. 1 27-1 31 (1896). I 169 22