84 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Abdomen of female nearly circular, covering entire sternal surface, 

 composed of seven separate segments of which the fourth, fifth, and 

 sixth are subequal and larger than the others. 



Measurements. Female holotype, length of carapace 20, width 

 of same 24 mm. 



Range. Santa Cruz, California (type-locality) ; two females be- 

 longing to the California Academy of Sciences were destroyed in 

 the fire following the San Francisco earthquake, 1906. Monterey 

 (Holmes). 



PINNOTHERES SERFEI Rathbun. 



Plate 19, figs. 1-7. 



Pinnotheres serrei RATHBUN, Bull. Mus. Hist. Nat., Paris, 1909, No. 2, p. 68, 

 1 text-fig, (type-locality, Porto Rico; type in Paris Mus.). 



Diagnosis. Dactyli falcate. Palp of maxilliped with three; 

 joints end to end. Male spotted all over; sternum cristate. Orbits 

 of female not visible from above ; ten pits on anterior half of carapace. 

 Description of male. Carapace slightly broader than long, subor- 

 bicular, widest in front of middle, posterior m-irgin straight, ante- 

 rior margin arcuate; surface punctate, flattened but with a slight 

 convexity, a pit either side of cardiac region and a slight trace of 



cervical suture ; no 

 marginal line to dor- 

 sum. Front in an- 

 terior view 7 curves 

 downward and back- 

 ward to interanten- 

 nular plate, its width 

 nearly one-third that 



FIG. 41. - PlNXOTIIEUES SERREI, OUTER MAXILLIPED OF FE- of CaraaCC J while 



MALE (48571), X 20. 



orbits together slightly exceeds half width of carapace. Eye-stalks 

 stout, diminishing from base to tip, visible from above, corneae large. 

 Antennae project slightly beyond outer corners of front ; antennules 

 very large, transversely-obliquely placed. 



Outer maxillipeds small, occupying but little space antero-poste- 

 riorly ; palpus stout, its three segments end to end, dactylus short and 

 stout. 



Chelae stout, oblong, lower margin of propodus straight for 

 nearly its length, upper margin convex, article widest at distal end; 

 fingers broad at base, meeting along the edges when closed; tips 

 curved toward each other, a basal tooth on movable finger fitting in 

 corresponding notch in thumb. 



First three legs nearly of a length, second longest, fourth shortest 

 and narrower; stout except for the dactyls which are slender and 



