548 



BULLETIN 129', UNITED STATES NATIONAL MUSEUM 



short ridge extends to middle of inner tooth of orbit, which ridge 

 separates the concavity of epistome from that of subhepatic region. 

 Merus ^* of maxilhpeds with two tubercles, one towards postero- 

 exterior angle, the other close to antero-exterior angle; anterior 

 margin of joint deeply concave or notched. 



Chelipeds short, pubescent, especially on the toothed edges; surface 

 between edges smooth; on basal joint below there is a strong, trian- 

 gular, pyramidal spine nearly as large as dorsal spines of carapace; 

 margins of merus crenulated with six or seven small teeth on either 

 edge; carpus flattened above, with two strong, crenulated crests, the 

 outer one of which bears a larger spiniform tooth at middle; hand 

 with an elevated 9-toothed superior crest and 11-toothed outer 



margin; fingers very small; dactylus at 

 right angles with palm. Legs much 

 compressed; carpus and propodus with 

 a laminiform crest above; merus and 

 propodus of posterior pair with slight 

 crest below. Abdomen of female gla- 

 brous. (Stimpson.) 



Measurements. — Female , holotype, 

 length of carapace 8.1, width of same 

 9.9, length of hand 7.1 mm. Male 

 (49202), length of carapace 6.6, width 

 of same 8.6, length of hand 6.5 mm. 



Variation.- — This species shows a 

 variation similar to that in Soleno- 

 lambrus typicus; the extremities of the 

 posterior margin may have a distinct 

 tooth as in the young female, or only a 

 slight indication of one as in the larger 

 specimens; the protuberances of the 

 carapace have more slender tips in the young specimen than in the 

 adults. 



Range. — West coast of Florida and Florida Keys; Gulf of Mexico 

 (A. Milne Edwards) ; Porto Rico; Flannegan Passage. Depth, 43^ to 

 27 fathoms. 



Material examined. — See table, page 549. 



MESORHOEA BELLH (A. MUne Edwards) 



Plate 201; plate 280, figs. 1-4 



Solenolambrus bellii A. Milne Edwards, Crust. R6g. Mex., 1878, p. 163, 

 pi. 29, figs. 6-6(i (type-locality, Mexico; type in Paris Mus.). 



Mesorhoea gilli Rathbun, Proe. U. S. Nat. Mus., vol. 16, 1893, p. 235 (type- 

 locality, Gulf of California, 20 to 71 fathoms; holotype, Cat. No. 17370, 



U.S.N.M.). 



Fig 



150.— Mesorhoea sexspino.- 

 (50456), maxilliped, x 33.8 



' Incorrectly represented in Crust. R6g. Mex., pi. 29, fig. 5a. 



