386 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Gclasimns ornatus S^^•rTI, Trans. Connecticut Acnd. Arts and Scl., vol. 2, 

 aSTO, p. 12."), pi. 2, fij;s. 9-9rt ; pi. 3. fij;s. 5-."c, female (type-locality, 

 west coast of Central America; type in Mas. Comp. Zoul.). 

 Cclasiiinis insionis Smith, Trans. Connecticut Acad. Arts and Sci., vol, 2, 

 ISTO, p. 12G. 



Diagnosis.— CaraivAce less than one and one-half times as wide as 

 long; in the female tuberculous or granulous; in the male smooth. 

 •Side margins of female tuberculous or dentate. Merus of legs tu- 

 berculous or spinous. 



Description. — Male, carapace one and tAvo-fifths times as wide as 

 long, slightly convex, very little narrowed posteriorly, surface naked 

 and deeply areolated. Cardiac region large and prominent. Bran- 

 chial regions covered by raised veinlike markings branching from a 

 central trimk. Front small, spatulate. Upper margin of orbit 

 raised, slightly sinuous, antero-lateral angles prominent, the one on 

 the side of the large hand directed strongly outward, the other di- 

 rected forward. Anterior part of lateral margin longitudinal, so 

 that the carapace is scarcely wider between the antero-lateral angles 

 than a short distance behind them. At the posterior end of this lon- 

 gitudinal portion are two marginal tubercles from which a granu- 

 lated line extends to the bases of the posterior legs where there is 

 another small tubercle. 



Lower margin of orbit armed with from 15 to 18 slender, com- 

 pressed and truncated teeth. Jugal regions veined somewhat as the 

 regions above. 



Merus of large cheliped smooth and rounded above; inner border 

 armed with slender tubercles, and rising into a low crest distally, 

 outer border armed with scattered tubercles. Carpus with several low 

 tubercles on outer surface, and one or two small tubercles at proximal 

 end of inner margin. Propodus high and lamellar, and exceeding in 

 length twice the length of the carapace. Basal portion short, covered 

 outside with large, depressed, well separated tubercles; inferior mar- 

 gin thin, armed with dentiform tubercles; inner surface with a 

 prominent tubercle near the middle, from Avhich an oblique line of 

 obscure tubercles extends to the lower margin. Digital portion very 

 broad at base, coarsely punctate outside, inferior edge denticulate and 

 margined on the outside, prehensile edge straight except a slight ex- 

 cavation at base, armed with small tubercles and a high, tubercular 

 median ridge, and at the tip with a slender tooth. Dactylus broadest 

 in distal half, upper edge arcuate, denticulate, prehensile edge 

 straight, closing against the pollex except at the base, and armed with 

 three rows of tubercles, and a sharp terminal tooth, tubercle at basal 

 third the largest. 



Merus of last three pairs of legs armed on posterior edge with 

 from three to seven spines. 



