X. PROCAMBARUS, A NEW SUBGENUS OF THE 

 GENUS CAMBARUS. 



By a. E. Ortmann, Ph.D. 



In a paper just published i Proc. Amer. Phil. Soc, vol. 44, 1905, 

 p. 91), the present writer has divided the genus Cambanis into four 

 subgenera: Cainbarus {^sens. strict.^, Cambarellus, Faxoniiis, and i?c?r- 

 tonius. The first of these (^Cainbarus) is framed to receive the first 

 and second group of this genus, as distinguished by Faxon (excluding 

 C. pellucidiis, which I refer to Faxotjiiis). 



In the paper referred to (p. 99), the writer has indicated, that the 

 association of Faxon's first and second grouj) into one subgenus might 

 possibly not be entirely correct, but, that a division according to the 

 number of legs which possess hooks on the ischiopodite, as introduced 

 by Faxon, does not exactly correspond to the natural affinities. He 

 also pointed out, that possibly the shape of the copulatory organs of 

 the males of certain Mexican and Cuban species is more important in 

 this respect. 



The Carnegie Museum has lately purchased from Professor J. S. 

 Hine, Columbus, O., a number of specimens of a new species of C«;//- 

 ^7/7/ J- from Guatemala (Ace. No. 2778; Cat. Nos. 74,560 and 74,561), 

 belonging in this group, which, in the paper referred to, has been 

 designated as the digit efi-%xow^^ (of the section of C. digiieti), con- 

 taining hitherto three species {digit cfi, mexicaiiits, citl'e/isis). An 

 examination of the copulatory organs of this new form, and their com- 

 parison with the figures of these organs of C. carinaius, = dig/tc/i and 

 citbeiisis, with the description of these organs in C. mexicauiis, and 

 with a male cotype of C. digit cti, kindly presented by Professor E. 

 Bouvier, of Paris, has led to the conclusion, that all these species, as 

 well as the new one to be described herein, possess a type of male 

 copulatory organs, which is quite peculiar, and differs considerably 

 from that seen in other species of the subgenus Cambarits (type: C. 

 blandingi) . 



The description of this organ, as given by Faxon for his first and 

 second groups, and by the present writer for the subgenus Cafiibarits, 

 does not apply at all to these Central American and Cuban species. 



435 



