CAMBARUS. 51 
Cambarus Aztecus, as described and figured by Saussure, has a shorter, 
flatter hand, and carpus spinous on internal border.* Von Martens (Arch. 
Naturgesch., XX XVIII. Jahrg., I. 151) would separate it from C. Mexieanus. 
Dr. Hagen has kindly given me the following note on the types of Saussure 
in the Berlin Museum, which he examined in September, 1870. 
“The first form of the male and the female, from Mexico, seem to be 
C. Mexicanus Erichs., with nearly cylindrical hands. The second form, with 
more flattened hands, belongs alone, then, to Saussure’s C. Aztecus. In the 
second form the antennal scale is more broadly truncate in front, and the 
rostrum is a little different, but these differences are not striking enough to 
preclude the identity.” 
A sketch of the first form male appendages, made from one of these 
types by Dr. Hagen, shows them to be of the same form as in the specimen 
I have described above. 
The female specimens noticed on page 59 under C. Wiegmanu have a 
shorter and broader chela and carpus, the granules on the mternal margin 
of the carpus assuming the character of spimules. As there are no male 
specimens among them, I am not sure that they are not the female of 
C. Aztecus Saus.; but this point, as well as the identity of C. Az/ecus and 
C. Mexicanus, | must leave unsettled for lack of material. 
Saussure’s locality for C. Azd/ecus is, “‘ Les ruisseaux du Mexique. — Pris 
& Tomatlan, dans les Terres-Chaudes.” According to Von Martens (Arch. 
Naturgesch., XXXVIII. Jahre., I. 150) there are specimens in the Berlin 
Zoblogical Museum from Puebla. 
18. Cambarus Cubensis. 
Plate II. fig. 1, Plate VIII. figs. 5, 5, 5a, 5a. 
Astacus (Cambarus) Cubensis, Ertcuson, Arch. Naturgesch., XII. Jahrg., I. 100, 1846. 
? Cambarus consobrinus, Saussure, Rev. et Mag. de Zool., 2¢ Sér., LX. 101, 1857.— Mém. Soc. Phys. Hist. 
Nat. Genéve, XIV. 457, Pl. IIL. fig. 21, 1858. 
Cmbarus Cubensis, Hagen, Il. Cat. Mus. Comp. Zodl., No. III. p. 85, 1870. (After Erichson.) 
Cambarus Cubensis, Von Martens, Arch. Naturgesch., XX XVIII. Jahrg., I. 129, 1872. 
Cambarus Cubensis, Faxon, Proc. Amer. Acad. Arts and Sci., XX. 142, 1884. 
Male, form I.—Rostrum triangular, moderately excavated, acumen short, 
acute, small lateral teeth at base of acumen. Anterior end of post-orbital 
* “ Cambarus Aztecus. Rostre court, arrondi au bout. Careénes latérales obtuses, ne se terminant pas 
en une épine. Carapace ponctuée, granuleuse sur les cétés, & sa portion antérieure, mais sans épines au bord 
du sillon oblique. Mains médiocres ou petites, comprimées, fortement granuleuses et écailleuses ; carpes 
écailleux, armés de petites épines, en dessous, une double rangée d’épines. Pattes de la troisieme paire, chez 
le male, armées, 2 leur base, d’une apophyse rudimentaire. Long., 2 pouces. — Mexique.” — Saussure. 
