454 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM, 



distal end very much enlarged and inflated. The ischium is not more 

 than half the length of the basis. The merus is a little longer than 

 the basis, and is enlarged at its distal end. The carpus is ver}" much 

 elongated, is longer than the ischium, is greatly enlarged distall}^, and 

 has its upper distal margin armed with three large triangularly- shaped 

 processes. The propodus has the inner surface 

 armed with two long, sharp, triangular processes, 

 its distal end being widely expanded and rounded 

 on the inner surface. Thedact^dus is bi-ungui- 

 culate. 



The other legs are of normal structure, ambu- 

 lator}" in character, and bi-unguiculate. In the 

 female the first pair of legs are similar in struc- 

 ture and size to the other legs. 



A number of individuals were collected b}^ Dr. 

 George Brown Goode at the Bermudas. 



Type specimens in Peabody Museum, Yale 

 University. Cat. No. 3208. 



73. Genus JANIROPSIS G. O. Sars.« 



Head without rostrum. 



Lateral parts of thoracic segments but slightly 

 expanded, not laciniate. Eyes well developed. 

 First pair of antenna? comparatively small, with 

 the flagellum composed of only a limited num- 

 ber of articles. Second pair of antenna? of 

 moderate length; antennal scale very small, but 

 distinctly defined. 



Maxillipeds with the second and third articles 

 of the palp very much expanded, laminar. 

 Distal extremity of the peduncle and the 

 branch of the first pleopoda in the male fused 

 and produced and dilated at the tip. 



Uropoda sliort, about h?Jf as long as abdomen. 

 Legs l)i-unguiculate. 



ANALYTICAL KEY TO THE SPECIES OF THE GENUS JANIROPSIS. 



a. Head with a prominent rounded median lobe on the anterior margin. Terminal 

 segment of body narrowly rounded, and with a small median lobe between the 

 uropoda; no lateral lobes Taniropsis californica Richardson 



a/ Frontal margin of head nearly straight, without a median lobe. Terminal seg- 

 ment of body posteriorly produced in three lobes, a broadly rounded median 

 lol)e and an acute lateral lobe on either side of the, median lobe. 



Juniropsis kincaidl Richardson 



Fig. 50C>.— ('aepias bermud- 

 ENsis. (1, First pleopod 

 OF MALE. X 58. b, Second 



PLEOPOD OF MALE. X 58. 



c, Female operculvm. 



X 58. 



« See Sars for characters of genus, Crust, of Norway, II, 1899, p. 102. 



