CAMBAEUS. 51 



Canibariis Asteciis, 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 llexicanns. 

 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. Astecits. 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 strikino- enou2;h 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. Wirgmmmi 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. Aztecus Saus. ; but this point, as well as the identity of C. Aztecus and 

 C. 3Iexicanus, I must leave unsettled fiar lack of material. 



Saussure's locality for 0. Aztecus 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 

 Zotiloojical Museum from Puebla. 



D 



18. Cambarus Cubensis. 



Plate n. eg. 1, Plate VIII. figs. 5, 5 , 5 a. S a'. 



Astacus {Cambarm) Cabemis, Erichson, Arch. Naturgesch., XII. Jahrg., I. 100, 1846. 



? Cambarus consobrhius, "SixssvR'B, Rev. el Mag. de Zool., 2^ Ser., IX. 101, 1S57. — Mem. Soc. Phys. Hist. 



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

 C.diibarus Ciihensis, Hagen, 111. Cat. Miis. Coiiip. Zoo!., No. III. p. 85, 1870. (After Erichson.) 

 Cambarus Cubeims, Von Martens, Arch. Naturgesch., XXXVIII. 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. Carenes laterales obtuses, ne se tenninant pas 

 en une epiue. Carapace ponctuee, grauulcusc sur les cotes, a sa portion antericurc, mais sans Opines au bord 

 du sillon oblique. Mains medioercs on petites, comprimecs, fortcnicnt grauuleuses et ccailleuses ; carpes 

 ecailleux, amies de petites epines, en dcssous, line double raugee d'epines. P.attes de la troisienic paire, chez 

 le male, armees, a leur base, d'une apophjse rudinientaire. Long., 2 pouccs. — Mexique." — Sai ssiiiE. 



