2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 93 



A word of appreciation is here extended to some of the students and 

 staff of the Biological Laboratory of the Louisiana State University 

 at Grand Isle, La. ; in particular, Dr. Ellinor H. Behre, Director, and 

 William W. Anderson, a student of several summers ago, whose in- 

 dustry first brought to my attention specimens of two undescribed 

 species found at Grand Isle, in the determination of which the other 

 information here presented was brought together. I also wish to thank, 

 among others, Drs. E. A. Andrews, of Johns Hopkins University; 

 C. B. Wilson, of the State Teachers College at Westfield, Mass. ; and 

 A. S. Pearse, of Duke University, Durham, N. C. who have con- 

 tributed specimens of Callianassas to the collections of the United 

 States National Museum. 



Three west Atlantic species are not included in the key given 

 below : 



(i.) Callianassa grandimana Gibbes (Proc. 3d. Meet. Amer. Assoc. 

 Adv. Sci., p. 194, 1850. Type locality, Key West). Many attempts 

 have been made to establish this species, regrettably so briefly described 

 by its author. The species to which it seems to stand nearest is C. 

 hranneri (Rathbun). Of this latter species I have the greater part of 

 several large specimens taken by Dr. A. S. Pearse on Long Key, Dry 

 Tortugas, Fla., out in the Gulf of Mexico, roughly 60 miles due west 

 of Key West, the type locality of C. grandinmna, but until we know 

 more of the Callianassas of our southern States we should refrain from 

 making use of Gibbes' specific name. Balss some time ago assigned a 

 specimen from Kingston, Jamaica, to C. grandimana, but the very 

 spiny armature of the ventral border of the ischium and merus of the 

 larger cheliped of this specimen definitely precludes any such identity. 

 The ischium of C. grandimana, second segment of Gibbes,' has " dis- 

 tant granules on its lower edge," and the merus, " the third segment [,] 

 is broader, dilated so as to form below a sharp serrated edge, which is 

 truncated as it approaches the posterior articulation." Balss' specimen, 

 moreover, shows a prominently trispinose front ; Gibbes says nothing 

 on this score, but I do believe if the front had been different in any 

 marked degree from that of C. major he would have made some com- 

 ment to that effect ; his observations, so far as they have been checked, 

 have always been proved accurate. His fault was brevity of descrip- 



^ De Man, Capita Zoologica, vol. 2, pt. 6, p. 19, 1928, does say that Gibbes did 

 not describe the merus and ischium, but in the very relations of the several joints 

 of the major cheliped as set forth by Gibbes, the second and third joints are none 

 other than those particular joints; the shape ascribed by him to each of them 

 makes their identification unmistakable. 



