NO. 1350. NATURAL HISTORY OF THE ISOPODA—RICIIARDSOX. 55 



3/unlda; for Dajus inysidis Kr0yer, two different species of Mysis; 

 for Aspidoj)/)rt/.fi/s peltatuH G. O. Sar.s, four different species of Ery- 

 throjjs^ one species of Pttferytliropx^ and also a species of Myxldopsix; 

 for Munnoiiisciis mannqjodlx Sars, two different species of host 

 belonging- to the Isopod genera, Eiirycope and llyaraclma. 



In the present paper, ten species of host are added to Sars's list of 

 those on which Phry.i'u.s ahdominaJis is found to be parasitic. The 

 list now includes the following additional species*. Pandalus leptoce- 

 rus, Splrontocat'is groetdandtca, S. arcaatu^ S. toumsendi^ S. tridens, 

 S. macro plithalina^ S. sucMeyi, S. ga'unardii heleheri^ S. fahricii, 

 and S. Munguis. Spence Bate also records it from Pltskmik-a semi- 

 laevh. 



Argeia jjuggettensis Dana is found parasitic on fifteen species of 

 host representing two different genera of Crangonidas, Crangon and 

 JVectocrangon. 



The list of hosts for Bopy)'oidti< hlpjjolytrs (Kr03'er) is also enlarged 

 and now includes the following additional species: Spirontocaris suck- 

 leyi^ S. hispinosa^ S. areuatd^ S. breiyirost7'is^ Pnidtdus Ix/realis, P. 

 montagui^ and Pandalopsis dispar. 



Pseudimie galacanthx Hansen, is herein recorded from two addi- 

 tional species of host. Munlda mihrugo^a and Mun'uhi </i(adrispina. 

 A new species of Pi'<)h()p>yrus described in the following pages, P. 

 h'lthijuh^ is found on two different species of Plthyn is, B. ohwals, and 

 P. acant haras. 



LIST OF REFERENCES. 



B.VTE, Spence. Characters of New Species of Crustaceans discovered by J. K. Lord 

 on the coast of Vancouver Island. Proc. Zool. Soc. London. 1864, p. 668. 



B.\TE, C. Spence, and Westwood, John Obadi.\h. A history of the British sessile- 

 eyed Crustacea. London, 1868, II. 



B.\TE, C. Spence. In Lord's Naturahst in British Cohnnbia. Lomlon, 1866, II, p. 

 282. 



Report on the Crustacea Macrura collected by H. ]\I. S. Challenger during 



the years 1873-1876. Challenger report, London, 1888, XXIV, Pt. 52, p. 574; 

 also pp. 645-646. 



BrcHHOLZ, Reinhold. Zweite deutsche Nordpolfahrt in den Jahren 1869 und 

 1870, unter Fiihrung des Kapitiins Koldewey. Leipzig, 1874, II, Pt. 8, Crusta- 

 ceen, pp. 286-288, pi. ii, tig. 2. 



Calman, W. T. On a collection of Crustacea from Tugct S<tund. Ann. N. Y. 

 Acad. Sci., New York, 1898, XI, pp. 274-284, i)l. xxxiv, tig. 5. 



CoRNAUA, Emilio, and Panceki, Paolo. Osservazioni zoologiche ed anatoniiche 

 sopra un nuovo genere di Isopodi sedentari [Gyge hrancliialix). Mom. R. Accad. 

 Sci., Torino, 1861(2), XIX, p. 114. 



Dana, James D. Crustacea. U. S. Exploring Expedition during the years 1838, 

 1839, 1840, 1841, 1842, under the command of Charles Wilkes, V. S. N., Phila- 

 delphia, 1853, XIV, Pt. 2, 1853. Atlas. 



Edwards, Henri Milne. Ilistoire naturellc dcs Crustaces, compreiiant I'anato- 

 niie, la physiologic et la I'lassitication de ccs animaux. Paris, 1840, III, p. 283. 



