374 W. C. M'lNTOSH ON BRITISH ANNELIDA. 



APHRODITID^. 



In the Catalogue of the British Museum three species of this group are described , 

 viz. Aphrodita aculeata, L., A. borealis, Johnst., and Hermione hystrix, Sav. An 

 examination of Dr. Johnston's specimens from Berwick Bay (in the British Museum) 

 shows that his A. borealis is the young of the first mentioned. A third species 

 {Lmtmonice filicornis, Kbg.) is not uncommon from Shetland to the Atlantic south 

 of the British Channel. 



POLYNOID.^. 



Eight species are indicated in the Catalogue, viz. Lepidonotus squamatus, L., L. clava, 

 Mont.', Evarne impar, Johnst., Uimoa nodosa, Sars (as L. pharetratus, Johnst.), Dasy 

 lepis asperrima, Sars (as L. pharetratus, Baii-d), Lagisva propinqua, Mgrn. (as Lepido- 

 notus semisculptus), Nychia cirrosa, Pallas (as L. imhricatus), and "i. pellucidus" 

 probably a young form of some of the foregoing. 



EuNOA NODOSA, Sars, was first dredged by Lieut. Thomas, and termed by Dr. Johnston 

 L. pharetratus ; Prof. E. Ray Lankester, from a specimen procured in Shetland by Dr. 

 Gwyn Jeff"reys, named it Antinoe zetlandica. It has a very wide range. Dr. Malmgren 

 vouches for the specimen in the British Museum ; and accordingly, though it is in bad 

 condition (apparently having been dried), it has been figured. A dorsal bristle is 

 represented, PL LXVII. fig. 4, and a ventral in fig. 5, both mounted in balsam, fig. 6 

 being another in water. The bristles of a specimen from the coast of Durham are given 

 in PI. LXVII. figs. 7, 8, the former representing the dorsal, the latter the ventral. 



Dasylepis asperrima, Sars. This was first recognized as British by Dr. Malmgren 

 (in the British Museum, where it was labelled Lepidonotus pharetratus). The specimen 

 had been sent to the late Dr. Baird by Mr. D. Robertson from the Frith of Clyde. 

 The great density of the dorsal tufts of bristles gives the animal a woolly appearance ; 

 and their ferruginous colour is also peculiar. The length of the example is about 

 one inch. The head has two large eyes at the posterior border, and one on each side 

 on the median prominence. The scales are roundish in front, reniform posteriorly, 

 and boldly armed on the posterior and outer margins and the neighbouring surface 



' The Aphrodita punctata of 0. Fabricius may be this form : but it is doubtful what oonnexiou the L. pimc- 

 iatus of ffirsted in his ' Gronlauds Dorsibr.' has with it. He evidently means the common L. squamatus in his 

 'Annulat. Danic' The Polynoe fuscescens of De Quatref. (Annel. i. p. 242) appears to he intimately allied to 

 L. clava ; and the same may be said of his P. modesta and the P. chjpeata of Grube. The Poli/noe levis of 

 Aud. & Ed. (including in the diagnosis the allusions afterwards made to it by H. Eathke, M. Sars, and De 

 Quatrefages), does not seem to be this species; indeed I have sometimes thought, from the descriptions of 

 Audouin & Edwards and De Quatrefages, that this P. levis might be a variety of P. setosissiyna with fourteen 

 pairs of scales. The P. gruUana of Claparede may be a variety of L. clava, since he does not distinguish it 

 from the latter while contrasting it with L. squamatus. 



