94 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Legs furnished with long hair on lower margin, especially on 

 propodus of first leg; length expressed by 2. 4. 3. 1, the second leg 

 being the longest ; propodus of second and third very concave below, 

 much thickened at proximal end; propodus of first and fourth 

 straight below; dactyli 1, 2, and 3 similar, curved, and with slender 

 tips, first shortest, second longest; dactylus 4 much longer than those 

 preceding and longer than its propodus. 



Abdomen longer and broader than carapace. 



Color. A triangular spot of lighter color embraces the front and 

 orbits and is continued in a narrow stripe for a short way on the 

 gastric region. 



Measurements. Female holotype, length of carapace 9.7, width of 

 same 9.2 mm. 



Range. Known only from the type-locality. 



PINNOTHERES MOSERI, 1 new species. 



Plate 21, figs. 3 and 4. 



Type-locality. Port Royal, Jamaica; in black ascidian; 1893; 

 K. P. Bigelow; female ovigerous (23440). 



Diagnosis. Carapace of female longer than broad. Dorsum sub- 

 pentagonal, uneven. Legs slender, subequal. 



Description of female. Surface pubescent. Carapace thin, mod- 

 erately, firm but not hard, suborbicular with the front and intestinal 



region a little produced; surface 

 uneven; gastric, cardiac, and in- 

 testinal regions elevated and well- 

 defined; a low tubercle on either 

 side of the anterior gastric slope; 

 FIG. 47 PINNOTHERES MOSERI, EXDO- from a point on the postero-lateral 



GNATH OF OUTER MAXILLIPED OF FEMALE mar g }n a b j unt gently CUrVed 

 HOLOTYPE, X 17. . & * 



(concave outward) ridge runs for- 

 ward and outward to the lateral angle or widest part of the carapnce; 

 below the ridge the surface descends steeply; the result being that 

 the dorsum appears subpentagonal. Front narrow, arcuate, a me- 

 dian emargination. 



Palp of outer maxilliped two-jointed; outer edge very thick, inner 

 edge thin; first joint short and broad, outer margin angled; second 

 joint oblong, distally rounded. No trace of a dactylus could be 

 found, so that this species presents an exception to the rule of a three- 

 jointed palp in Pinnotheres. 



Chelipeds elongate, rather slender ; manus increasing distally, mar- 

 gins nearly straight; fingers nearly as long as top of palm, a little 



1 Named for Lieut. J. F. Moser, U. S. Navy, the first to collect this species. 



