THE ISOPODS 



INTRODUCTION 



The isopods taken during the last cruise of the Car- 

 negie, 1928-1929, are a well-known and widely distrib- 

 uted species, five in number, representing three fami- 

 lies and three genera. In these are included specimens 

 of Idothea metallica Bosc. It is interesting to note that 

 the only previous Pacific record for this species was 

 based on specimens from Japan; new records established 

 by the Carnegie are off Easter Island (station 53) and off 



Chile (station 59). As a matter of convenience, refer- 

 ence has been made to the original descriptions and to a 

 paper in which each of the several species is adequate- 

 ly figured. 



The author wishes to thank the Carnegie Institution 

 of Washington for the privilege of examining this collec- 

 tion. 



SYSTEMATIC DISCUSSION 



FAMILY CIROLANIDAE 



Genus EURYDICE Leach 



Eurydice truncata Norman 



Eurydice truncata Norman, Ann. Mag. Nat. Hist., ser. 4, 

 vol. 2, 1868, p. 421, pi. 23, figs. 12-15. Tattersall, 

 Isop.; Nord. Plankton, vol. 6 (Lief. 14), 1911, p. 214, 

 figs. 72-79. 



OCCURRENCE 



Off Ireland, between stations 6 and 7, 50° 00' north, 

 12° 00' west, three specimens. Off Ireland, between 

 stations 6 and 7, 50° 00' north, 11° 00' west, eight spec- 

 imens. 



DISTRIBUTION 

 West coast of Europe and the Mediterranean. 



FAMILY IDOTHEIDAE 



Genus IDOTHEA Fabricius 



Idothea baltica (Pallas) 



Idothea baltica Pallas, Spic. Zool. (9), 1772, pp. 67-78, 

 pi. IV, fig. 6. Richardson, Bull. 59, U. S. Nat. Mus., 

 1905, pp. 364-365, 3 figs. 



OCCURRENCE 



Off Ireland, between stations 6 and 7, 50° 00' north, 

 10° 00' west, forty specimens. 



DISTRIBUTION 

 Widely distributed in Atlantic and adjacent waters. 



Idothea emarginata (Fabricius) 



Idothea emarginata Fabricius, Ent. Syst. ii, 1793, p. 508. 

 Sars, Crust. Norway, vol. II, 1899, pp. 81-82, pi. 33. 



10' 



OCCURRENCE 



Off Ireland, between stations 6 and 7, 50° 00' north, 

 00' west, ten specimens. 



Idothea metallica Bosc 



Idothea metallica Bosc, Hist. Nat. Crust., II, 1802, p. 

 179, pi. XV, fig. 6. Richardson, Bull. 54, U. S. Nat. 

 Mus., 1905, pp. 362-363, 3 figs. 



OCCURRENCE 



Off Ireland, between stations 6 and 7, 50° 00' north, 

 10° 00' west, four specimens. Off Ireland, station 6, 

 50° 22' north, 13° 31' west, seven specimens. Off East- 

 er Island, station 53, 29° 06' south, 108° 44' west, one 

 specimen. Mid-North Atlantic, station 2, 39° 06' north, 

 45° 41' west, one specimen. Off Chile, station 59, 39° 

 51' south, 101° 04' west, one specimen. Off Japan, be- 

 tween stations 115 and 116, 38° 22' north, 147° 20' east, 

 three specimens. 



DISTRIBUTION 



Cosmopolitan. 



FAMILY JANIRIDAE 



Genus JANIRA Leach 



Janira minuta Richardson 



Janira minuta Richardson, Trans. Conn. Acad. Sci., vol. 

 XI, 1902, p. 297, pi. XXXIX, figs. 50-52. Bull. 54, 

 U. S. Nat. Mus., 1905, pp. 471-472, 3 figs. 



OCCURRENCE 



Mid-North Atlantic, between stations 1 and 2, 37° 53' 

 north, 52° 46' west, one specimen. Mid-North Atlantic, 

 between stations 13 and 14, 42° 10' north, 47° 19' west, 

 four specimens. Caribbean Sea, station 34, 11° 18' 

 north, 78° 34' west, one specimen. 



DISTRIBUTION 

 New England coast and Bermudas. 



REMARKS 



Two specimens, the one from station 34 and the 



other from between stations 1 and 2, are identified with 



this species with some hesitation because of their very 



small size and the fact that many of the appendages are 



I missing. 



75 



