CAMI'.AIirS. 51 



Cinnb/irns Azteciix, as described and figured by Saussure, has a shorter, 

 flatter hand, and carpus spinous on internal border.* Von Martens (Arch. 

 Naturgesch., XXXVIII. Jahrg., I. 131) would separate it from C. Mcxicmnix. 

 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 

 G. M(\cinnni>s Erichs., with nearly cylindrical hands. The second form, with 

 more flattened hands, belongs alone, then, to Saussure's C. Azteciis. In the 

 second form the antenna! 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 39 under C. Wiec/manni have a 

 shorter and broader chela and carpus, the granules on the internal margin 

 of the carpus assuming the character of spinules. As there are no male 

 specimens among them, I am not sure that they are not the female of 

 C. Aztccus Saus. ; but this point, as well as the identity of C. Aztccus and 

 C. Mcxicanus, I must leave unsettled for lack of material. 



Saussure's locality for C. Astecus is, " Les ruisseaux du Mexique. Pris 

 a Tomatlan, dans les Terres-Chaudes." According to Von Martens (Arch. 

 Naturgesch., XXXVIII. Jahrg., I. 130) there are specimens in the Berlin 

 Zoological Museum from Puebla. 



o 



18. Cambarus Cubensis. 



Plate II. fig. 1, Plate VIII. figs. 5, 5, 5 a, 5 a'. 



Astacus (Cambarus) Cubeims, EEICHSON, Arch. Naturgesch., XII. Jahrg., I. 100, 1846. 



? Cambarus consobrinas, SAUSSUKE, Rev. et Mag. de Zool., 2 e Ser., IX. 101, 1S57- Mem. Soc. Phjs. Hist. 



Nat. Geneve, XIV. 457, PI. III. fig. 21, 1858. 



r.,imbarns Cubensis, HAGEX, 111. Cat. Mus. Comp. Zool., No. III. p. 85, 1870. (After Erichson.) 

 <':i,,i/nirits Cubt'iisis, VON MARTENS, Arch. Naturgesch., XXXVIII. Jahrg., I. 129, 1872. 

 Cambiu-iix < V/Vv/s/.s, PAXOX, Proc. Amer. Acad. Arts aud Sci., XX. 142, 1S84. 



Male, form I. Kostrum 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. Carenes laterales obtuses, ne se termiuaut pas 

 eu ime epine. Carapace ponctuee, granuleuse sur les cotes, a sa portion auterieurc. mais sans {'-pines an bord 

 du sillon oblique. Mains medicares ou petites, comprimees, fortement granuleuses et ecailleuses ; carpes 

 ecailleux, armes dc petites epines, en dessous, une double rangee d'epiiies. Pattes de la troisieme paire, chez 

 le male, armees, a leur base, d'une apophj'se rudimeiitaire. Long., 2 pouces. Mexique." 



