60 



BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Eight cheliped larger than left. Carpus with inner angle rounded, 

 and without a tooth. Manus of larger cheliped about one-half 

 wider than that of the smaller cheliped in the male, and much more 



Fro. 28. CHASMOCAKCINUS CYLINDHICUS, FEMALE (24551), DORSAL VIEW, X 2J. 



swollen, its fingers gaping at base ; in the female the hands are more 

 nearly equal and the fingers do not gape. 



Legs narrow, fringed with hair. 



Penultimate sternal segment of male without a posterior supple- 

 mentary plate. 



FIG. 29. CHASMOCARCINUS CYLINDHICDS. o, RIGHT CHELA OP MALE HOLOTYPE, X 6; 



6, ABDOMEN AND STEUXTJM OF MALE HOLOTYl'E, X 61 J C, ABDOMEN OF FEMALE (24551), 

 X 61. 



Measurements. Male holotype, length of carapace 4.6, width of 

 same 6.5 mm. Female (24551), length of carapace 6.7, width of 

 same 9.5 mm. 



Range. Jamaica and Porto Rico ; 7 to 172 fathoms. 



Material examined. See page 59. 



