220 HILLETIN OF THE BUREAU OF FISHERIES. 



I hope very soon to In- able to extend this investigation to specimens of Bopyroides hippolytes from 

 other hosts than those given here and to carry on the same studies with Argeia pugeltemis ami 

 /'A;-// vu8 abdominalis. 



Argeia pugettensis Dana. 



Argeia pugctlensis Dana, l". s. Expl. Exp. XIV, 1853, Crust., II, ]>. 804, pi. i.m, %;. Stimpson, Bos. Journ. Nut. Hist., 



VI, ls.~>7, p. 71. 

 Argeia sp.? Caiman, Ann. N. Y. Acad. S.-L. XI. X... IS. 1898, p. ^si. 



i ,,„,„//, nsis Richardson, Proe. U. S. Nat. Museum, XXI. 1899, p. 8G8; XXVII, 1903, pp. 60-64; Proc. r. S. Nat. Museum, 



XXVII. 1904, pp. 60 64 



Localities. — Station 4192, Gulf of Georgia, off Nanaimo, Vancouver Island, British Columbia; Kili- 

 sut Harbor, near Port Townsend, on Crangon alaskensis Lockington; stations 4'_'l'0 and 4l'L'2, Admiralty 

 Inlet, vicinity of Port Townsend, on Crangon alaskensis Lockington and <'rtin<jm, communis Rathbun; 

 station 4l':.'7, vicinity of Naha Bay, Behm (anal. Southeast Alaska, on ( 'rangon communis Rat hi am, and 

 Neclocrangon dentata Rathbun; depth, 16-89 fathoms. 



Phryxus abdominalis (K rover). 



Bopyrus abdominalis Kruyer, Naturhistorisk Tidsskrift, II. 1840, pp. 102-289, pis. i. n: Monog. Fremst. Slsegten Hippolytes 

 nordiske Arter, 1842, p. 263. 



Phryxus hippolytes Rathke, Fauna Norwegens, 1843, p„ 40, pi. n, figs. 1-10. 



Phryxus abdominalis Lilljeborg, cEfvers. Kongl. Vet.-Akad. Forh., IX, 1852, p. 11. Steenstrup and Liitken, Vidensk. 

 Meddelelser, 1861, p. 275 (9). Kale and Westwood, Brit. Sessile-eyed Crust., II, 1808. p. 234. Norman, Rep. Brit. 

 Ass,,,-.. 1869, p. 288; Proc. Royal Sue. Eon., XXV. 1870, p. 209. Buchholz, Zweite deutsche Nordpolfahrt, 1874, p. 

 287. Metzger, Nordseefahrt der Pomm., 1875, p. 286. Mieis, Ann. Mag. Nat. Hist. (4), XX, 1877, p. 65 (15) 

 smith in Harger, Tree, r s_ Nat. Museum, II, 1879. p. 158. Harger, Rep. U.S. Fish Comm., i880, pt. 6. (See 

 Harger for synonymy and bibliography.) Axel Ohlin. Bidrag till Kannedomen om Malaknstrakfaunan i Baffin 

 Bayoeh smith Sound, 1895, pp. 18-19. Sars, Crust, of Norway. II, 1899, pp. 215-217, pi. it. xci. Richardson, 

 Proc. i'. s. Nat. Museum, XXIII, 1901, p. "■77. and XXVII. 1904, pp. 58-59. 



Localities. — Station 419:.', Gulf of Georgia, off Nanaimo, Vancouver Island, British Columbia, on 

 Spirontocaris bispinosa Holmes; station 4L'lti, Admiralty Inlet, vicinity of Port Townsend, on Spironto- 

 caris tridens Rathbun; station 4220, Admiralty Inlet, vicinity of Port Townsend, on Spirontocaris tridens 

 Rathbun; station 4-L'L', Admiralty Inlet, vicinity of Port Townsend, on Spirontocaris tridens Rathbun; 

 station 4229, vicinity of Naha Bay, Behm Canal, Southeast Alaska, on Spirontocaris macrophthalma 

 Rathbun; station 4l'M0, vicinity of Naha Bay, Behm Canal, Southeast Alaska, on Spirontocaris macroph- 

 thalma Rathbun; station 4l>!!0, Dyak Bay, Kadiak Island, on Spirontocaris suckleyi (Stimpson). 



Depth, 16-256 fathoms. 



Family DAJID^. 



H0L0PHRYXUS Richardson, new genus. 



This genus differs from Dajus K raver in the absence of all appendages to the abdomen of the 

 female and in lacking all trace of segmentation. It differs from Notophryxus Sars and Aspidophryxus 

 Sars", in having all five pairs of incubatory plates, only one pair being present in Sars' genera; 

 in having no trace of segmentation, in the shape of the oral area, and the position and form of the 

 abdomen, etc. It differs from Heterophryxus Sars '» in the position of the last pair of le^s, which in 

 Heterophryxus are rather anomalous in structure, are placed at the posterior extremity of the body, 

 and are adapted for clasping. It .lifters from Branchiophryxus Caullery c in having five pairs of legs 

 and live pairs of incubatory plates, while in Branchiophryxus there are but four pairs of legs ami 

 four pairs of incubatory plates. It differs from Zonophryxus Richardson^ in lacking pleopoda, one 

 pair being present in Zonophryxus, in the form of the abdomen, and in the general shape of the body. 

 It differs from Prodajus Bonnier' in the form of the abdomen, which is unsegmented and not 

 bifurcate. 



' t irustacea oi Norway, II. 1S99, pp. 225-231. Norwegian North-Atlantic Expedition, Crust. I, 1885. pp. 136-139. 



^Challenger Report, XIII, 1885, Pt. XXXVII. Report on the Schizopoda, pp. 220-221, pi. xx.wm, figs. 8-14. 



cJourn. R. Mirr. Soc. Lond., 1897, pt. 3, p. 204. Zool. Anzeiger, XX. 1897, pp. 88-92. 



a r s t 'isu comm. Report, 1903, pp. >i 52 



eC. E i.cad. Sc Paris, CXXXVI, 1903, pp. 102-103, 



