S. I. Smith — Crustaceans of the Atlantic Coast. 107 



CUMACEA. 



The following account of the Cumacea is even more imperfect than 

 the enumeration of the species of the groups treated above. Xo 

 reference is made to a few small species, which are represented in 

 the collections examined by young or imperfect specimens only. 

 Several of the species were first very kindly determined for me several 

 years ago by Professor G. (). Sars. 



Diastylis Rathkii Bate. 



Guma Rathkii Kroyer, Naturhistorisk Tidsskrift, iii. pp. 513, 531, pis. o, 6, figs. 

 n-30, 1841 ( 2 ) ; ibid., II, ii, pp. 145. 207, pi. 1, figs. 4 and 6, 1846 : in Gaimard, 

 Voyages en Scandinavie, en Laponie. etc., pi. 5, fig. 1, 1849. — Liljeborg, CEfver- 

 sight Kongl. Vetenskaps-Akad. Forhandlingar, Stockholm, 1852, p. 6. — Mobius, 

 Die wirbellosen Thiere der Ostsee, Exped. 1871 auf Pommerania. p. 122, 1873. 



Guma angulaia Kroyer, Naturhistorisk Tidsskrift, II, ii. pp. 156, 206, pi. 2, fig. 1. 

 1846; in Gaimard, op. cit., pi. 5, fig. 2. 1849 ($ ). 



Diastylis Rathkii Bate, Annals and Magazine Nat. Hist., II, xvii, p. 451 (3), pi. 13. 

 figs. 1-21, 1856. — G-. 0. Sars, Christiania Videnskabs-Selskabs Forhandlinger. 

 1864, p. 160; Om Cumaceer fra de store dybder i Nordishafvet. Kongl. Svenska 

 Yetenskaps-Akad. Handlingar, Stockholm, xi, no. 6, p. 7, pi. 3, figs. 8-9, 1873; 

 Archiv for Mathematik og Naturvidenskab, Kristiania, ii, p. 345. 1875. — Metzger. 

 .lahresbericht der Comm. zur wissensch. IJntersuchnng der deutschen Meere fiir 

 1872, 1873, Nordsee, p. 286, 1875. 



Alauna Goodsiri Packard, Memoirs Boston Soc. Nat. Hist., i, p. 301, 1867. (Not of 

 Bell, in Belcher, Last of the Arctic Voyages in search of Sir John Franklin, ii, 

 p. 403, pi. 34, fig. 2, 1855 ; though it is very probably the species mentioned bj^ 

 Bell as perhaps a form of his species and partially figured on the same plate, 

 figure 3, with which figure Packard identified his specimens.) 



Off Halifax !, Nova Scotia, 1877 : 42 fathoms, line sand, — five 

 males, six females; 52 fathoms, fine sandy mud, — one male, seven 

 females ; 57 fathoms, gravel and stones, — one specimen. Also just 

 off Chebucto Head!, Halifax, 1872, 20 fathoms, soft mud and fine 

 sand,— young only. Gulf of St. Lawrence!, 1871, 1872, 1873 (Whit- 

 eaves). Labrador ! (Packard). Greenland (Kroyer, Norman), North 

 latitude 81°, east longitude 1°, 450 fathoms (G. O, Sars). British 

 Isles! (Norman). Norway! (G. O. Sars). Baltic! (Mobius). 



In 1873 I sent some of the specimens collected on the coast of 

 Labrador by Prof. Packard, to Prof. G. O. Sars and he wrote me that 

 they belonged to a new species, but I atn unable to find any constant 

 differences which will distinguish the specimens which still remain 

 from Prof. Packard's collection from European specimens of D. 

 Rathkii. Most of the specimens from Labrador have the sides oi' 



