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 very much 

 elongated, is longer than the ischium, is greatly enlarged distally, 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. The dactylus is bi-ungui- 

 culate. 



The other legs are of normal structure, ambu- 

 latory 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 by Dr. 

 George Brown Goode at the Bermudas. 



Type specimens in Peabody Museum, Yale 

 University. Cat. No. 3203. 



73. Genus JANIROPSIS G. O. Sars. 



Head without rostrum. 



Lateral parts of thoracic segments but slightly 

 expanded, not laciniate. E} r es well developed. 

 First pair of antenna? comparative^ small, with 

 the flagellum composed of only a limited num- 

 ber of articles. Second pair of antennae 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 short, about half as long as abdomen. 

 Legs bi-unguiculate. 



ANALYTICAL KEY TO THE SPECIES OF THE GENTS 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 Janiropsis calif ornica 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 

 lobe and an acute lateral lobe on either side of the median lobe. 



Janiropsis kincaidi Richardson 



FIG. 506. CARPIAS BEKMUD- 

 ENSIS. , FIRST PLEOPOD 

 OF MALE, x 58. b, SECOND 



PI.EOPOD OF MALE. X 58. 



c, FEMALE OPERCULDM. 



x 58. 



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



