CRA\TISHES. 363 



other, on each side of the latero-anterior margin of tlie carapace, above the well- 

 developed branchiostegian spines. This is a feature that one would not suspect 

 to be a juvenile mark, and it may denote specific di^'ersity. There are, moreover, 

 two sharp spines on the second segment of the antennae near the base of the 

 antennal scales. 



The chelae of the specimen collected by Mr. Peters are slender and nearly 

 smooth, the fingers sparsely pilose, the spines of the carpus and merus well devel- 

 oped, as in young specimens of C. pilosimanus according to Ortmann. The 

 anterior segment of the telson is three-spined on each side, the inner spine being 

 very small; the median longitudinal rib on the dorsal face of the inner branch 

 of the last abdominal appendages ends in a spine some distance from the posterior 

 margin. 



The type locality of C. pilosimanus is Coban, Guatemala. Dr. Ortmann 

 also records one specimen, in the Museum of Natural History of Paris, from 

 Belize, British Honduras, a locality not very remote from the place where JNIr. 

 Peters got his specimen. Mr. A. S. Pearse (13th Ann. Rep. Mich. Acad. Sci., 

 1911, p. 110) has more recently recorded it from Cuatotolapam, Canton of 

 Acayucan, State of Vera Cruz, Mexico. The type locality of C. williamsoni is 

 Los Amates, Province of Izabal, Guatemala. 



Cambarus mexicanus Erichson. 



New localities: — Mexico: Tuxtla Gutierrez, State of Chiapas (U. S. N. 

 M., No. 30,580); Jalapa, State of Vera Cruz (Field Mus. Nat. Hist.). 



Mr. A. S. Pearse ' has recently redescribed this species under the name 

 Cambarus ruthveni, sp. no\'., from the hacienda of Cuatotolapam, Canton of 

 Acayucan, State of Vera Cruz, Mexico, altitude, 15 metres. 



Cambarus cubensis Erichson. 



New localities: — Cuba: Almendares River, Calabazar, Pro\ance of Habana 

 (U. S. N. M., No. 31,881); Union de Reyes, Province of Matanzas (M. C. Z., 

 No. 7,633) ; Ciego de Avila, Province of Camagiiey (Coll. J. T. Nichols). 



There is a small specimen, a male, only | in. long, in the U. S. National ^lu- 

 seum (No. 28,625), from Nueva Gerona, Isla de Pinos. It was collected by 



' Report on the Crustacea collected by I lie University of Michigan — Walker ExiJeciition in the State 

 of Vera Cruz, Mexico. Thirteenth Ann. Rep. Mich. Acad. Sci., 1911. p. 110. 



