604 



BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



PHILOSCIA CULEBRiE Moore. 



PhUoscia culebrn' Moore, Bull. U. S. Fish Commission, XX, Pt. 2, 1902, p. 176, 

 pi. XI, figs. 13-17. 



Locality. — Culebra, Porto Rico, from drift on shore. 

 "Bod}" elongate-oval, about 2,5 times as long as broad; head about 



twice as broad as long, front somewhat 

 recurved between sides and middle, 

 producing the appearance of a small 

 lobe in front of each e^^e, sides and 

 posterior margin rounded; first seg- 

 ment of thorax longest, its anterior 

 and posterior margins strongl}" curved, 

 anterior angle rounded and projecting 

 somewhat beyond sides of head; next 

 six segments subequal in length, sec- 

 ond, third, and fourth widest, the last 

 three successivel}" narrower; posterior 

 angles of last four segments produced, 

 successively increasing in length, that 

 of last reaching almost to posterior 

 border of third abdominal segment; 

 abdomen almost as long as last three 

 segments of thorax, gradually decreas- 

 ing in width posteriorly; segments sub- 

 equal in length, the sides of the first 

 more or less concealed by the lateral 

 angle of the last thoracic segment; 

 telson short, hardly longer than other 

 segments, produced to a blunt point in 

 median line posteriori}". 



"Eyes moderate (for the genus); 

 first antenna' minute, second antennae 

 when laid against sides of body extend- 

 ing to about end of second thoracic 

 segment, spinulose; peduncle, five- 

 jointed; first joint, short; second and 

 third, equal; fourth, longer; fifth, long- 

 est, equal to third and fourth com- 

 bined; flagellum three-jointed, about 

 equal to last joint of peduncle. Man- 

 dible with narrow four or five dentate 

 ti]), at the base of which are two plumulose seta?, and lower down a 

 biush of fine setie; no palp. First maxilhi? with inner plate furnished 

 with several small spines; outer plate with many. 



Fig. 660. — Philoscia culebr.e (After 

 Moore), a, Dorsal view, b, Second 



ANTENNA. C, MANDIBLE, d, FiRST LEG. 



r, Fourth leg. 



