THE SPIDER CRABS OF AMERICA 539 



Description. — Carapace short and broad, with projecting lateral 

 angles. wSurface punctate, much more finely than in typicus. Antero- 

 lateral margins long and convex; the two together would form a 

 regular arc were it not for projection of rostrum; each armed with 

 11 little projecting, tridenticulate, teeth the middle ones broadest. 

 Postero-lateral margin concave, posterior margin short and slightly- 

 convex. Protuberances of carapace like those of typicus, but stronger ; 

 their ridges crenulated; gastric and cardiac protuberances very tall, 

 with strongly projecting apices, which are almost spiniform but not 

 acuminate; ridge of branchial region convex forward and crenulated, 

 with a larger toothlet at middle. Basal article of external antennae 

 shorter than next article. Eyes very small. Afferent and subhepatic 

 channels very deep, the ridge separating them being prominent and 

 very thin and sharp. No supplementary ridge on subhepatic region. 

 External maxillipeds with hairy margins and with a tubercle near 

 inner summit of ischium; antero-external angle of merus less acute 

 and prominent than in typicus; merus with three or four strong 

 tubercles on external oblique ridge. Sternum between chelipeds 

 concave, without tubercles. Chelipeds rather short; merus seven- 

 toothed before and behind; carpus with five denticulated crests; 

 hand wath nine strong, subspiniform teeth on superior crest, and the 

 same number of tuberculiform teeth on outer and inner edge of lower 

 surface; on the inner edge the teeth are minute toward the base, but 

 are large on outer half of hand; surface of hand between toothed 

 crests smooth; inferior surface, and interstices of teeth of all three 

 crests pubescent; hand expanded in width at distal extremity, and 

 dactylus when retracted exactly at right angles with palm. Legs 

 compressed, glabrous; merus joints with acute, sparsely ciliated 

 superior edge; merus of posterior pair obtuse below, without crest. 

 Abdomen smooth. (Stimpson.) 



Measurements. — Female, holotype, length of carapace 10.2, width 

 of same 13.2, length of merus of cheliped 7.9, of hand 9.4 mm. 



Range. — Panama (Stimpson, Nobili). 



SOLENOLAMBRUS PORTORICENSIS Rathbon 



Plate 194, figs. 5 and 6 



Solenolamhrus typicus Rathbun, Bull. U. S. Fish Comm., vol. 20, for 1900, 

 pt. 2 (1901), p. 81 (part: specimen from Mayaguez Harbor). 



Solenolamhrus portoricensis Rathbtjn, Proc. U. S. Nat. Mus., vol. 64, art. 

 14, 1924, p. 5 (type-locality, Mayaguez Harbor, Porto Rico, 75 to 76 

 fathoms; holotype, male. Cat. No. 24237, U.S.N.M.). 



Diagnosis. — Six minute teeth on posterior and postero-lateral 

 margins. No spines on median line. On outer and lower surfaces 

 of palm a row of large granulated tubercles parallel to each margin; 

 outer and inner margins tuberculated ; dactylus at right angles 

 with palm. Cheliped two and a third times as long as carapace. 



