^*'i89i!'''] PROCEEDINGS OF THE NATIONAL MUSEUM. 371 



produced and angular ; posterior portion rounded. Second tooth au 

 oblong lobe. Third tooth pointed ; posterior margin about twice as 

 long as the anterior. Fourth tooth short; posterior margin continuous 

 with the posterolateral margin of the carapace, (iranules on the 

 margin of the teeth very small and inconspicuous. 



Subhepatic regions finely granulate. Tubercle prominent. 



Seventh segment of male sternum not exposed. General outline of 

 distal half of abdomen nearly straiglito Proximal end of anchylosed 

 segment angular. 



Carpus broad. Tooth at the inner angle very small. Groove at the 

 outer margin deep and channeled, and a second groove at right angles 

 to the first runs back on the carpus, forming two tubercles on a line 

 with the upper margin of the hand. Hands rather thin and deep. 

 Dactyl of the large hand very slen<ler, with a white, cylindrical tooth 

 at its base. Tubercle on the manus at the base of the dactyl. Fingers 

 brown, lighter at the tips, color running up on the hand in the larger 

 specimens. '^> 



The carpal groove in connection with the flat carapace, the antero- 

 lateral teeth without prominent granules, and the emarginate post- 

 ocular tooth, distinguishes this species readily from planus. 



Length of carapace in large specimen, 8.5 millimetres; width, 12 

 millimetres. 



RECORD OF SPECIMENS EXAMINED. 



La Paz Harbor, Lower Califoiiiia ; L. Beldiiig (4629); U. S. Fisb Commissiou, 1889 

 (16025). 



15. Pauopeus serratus Sanssure. 

 (Plate XXIV, figs. 8 aud 4.) 



Pauopeus serratus. H. do Sanssure, Rev. et Mag. de Zool. (-2), 9, p. 502, 18.')7 ; M^m. 



See. Phys. Geneve, xiv, p. 432, pi. 1, fig. 7, 1857. W. S[timpsou], Amer. Jour. 



Sci. (2), 27, p. 446, 1859. S. I. Smith, Proc. Bostou Soc. Nat. Hist., xii, p. 280, 



1S69. E. V. Martens, Arch, fiir Natnr., :58, p. 90, 1872. A. Milno Edwards, Miss. 



Sci. an Mexiqne, pt. 5, i, p. 311, 1830; Bull. Mus. Comp. Zool., viii, p. 13, 1880. 

 Pauopeus lurhstii var. serratus. E. .1. Miers, Challenger Rei)t., Zool , xvii, p. 129, 



18-6. 



To this Species have been doubtfully referred two small specimens, 

 a male from No Name Key, Florida (1566i), and a female from Dry 

 Tortugas (?), Florida (laGfJS). 



Carapace convex, with rather well-marked areolets. Front very little 

 produced, nearly straight, thin, with a line of granules on the edge, giv- 

 ing it a minutely denticulate appearance. xVntero-lateral teeth sharp, 

 the posterior three hooked forward. Sinus between the external augU? 

 of the orbit and the first tooth deep. External hiatus of orbit a large 

 V-shaped opening. Subhepatic tubercle small but well defined. Abdo- 

 men much like that of occidentalis. Seventh segment of sternum ex- 

 posed. Coxfe of fifth pair of feet in contact with third abdominal seg- 

 ment. 



