122 



BU1.LKTIK 97, UJNITED STATES NATIONAL MUSEUM. 



which is continued obliquely inward and backward halfway to the 

 median line ; surface outside this ridge concave, so that the posterior 

 dorsum appears very narrow ; postero-lateral surface also hairy, con- 

 cealing the postero-lateral margin, which is concave: carapace 

 considerably narrower behind than across the middle ; posterior mar- 

 gin sinuous; frontal margin convex, following the antero-lateral 

 arch, but viewed from an oblique anterior direction the front is 

 bilobed. 



Buccal cavity anteriorly truncate. Outer maxillipeds large; 

 merus subsf)atulate, broadly truncate at summit, inner corner 

 rounded; carpus and propodus of good size, the latter widenmg a 

 little toward distal end, outer two-thirds of distal margin truncate 

 with rounded angles; inner third less produced and more oblique, 

 bearing a short, broad dactylus which overreaches the propodus. 



Carpus and propodus of chelipeds ornamented with oblique, rugose, 

 hairy lines; propodus thick, distally diminishing; palmar portion 



Fig. 68. — JDissou.^ityi.u.s bohhaimii.ki, female (49231). a, Outeu maxii-i-iped, X 23; 



b, LEO, X 11. 



very convex below in proximal two-thirds; lingers stout, furrowed, 

 prehensile margins crenulate, meeting when closed, tips acute, turned 

 inward and overlapping. 



Legs short, stout, long-hairy; merus about twice as long as wide; 

 dactyli nearly straight, tapering to a slender, slightly curved, horny 

 tip ; in the first three legs there is a slender, minute, subsidiai*y spine 

 on the posterior margin, a little distal to the middle. 



Abdomen of male with segments 1 and 2 fused, and also 8 to 6, 

 inclusive; side margins of 2 to 6, inclusive, convex, 7 an equilateral 

 triangle. Abdomen of female with segments separate, the second 

 strikingly longer near middle than at the sides, seventh half as wide 

 as sixth. 



Measurements. — Male (23790), length of carapace 3.5, width of 

 same 4.3 mm. Female (49231). length of carapace 6.2, width of same 

 8.1 mm. 



Range. — Southern Florida; Jamaica. To a depth of 30 fathoms. 



