Boone, Crustacea, Cruises of "Eagle" and "Ara," 1921-28 163 



the latter ; the remaining articles of this pair of antennae are unfor- 

 tunately broken. 



The first chelipeds are rather slender; the coxa and basis are well 

 developed, subequal; the ischium is smaller and slenderer than the 

 basis ; the merus is long, wider distally, with its outer lateral surface 

 flat, the upper margin earinate; the carpus is scarcely one-third as 

 long as the merus and is convex, narrow basally and about one-third 

 wider distally; the propodus is almost as long as the carapace; half 

 as high as long, and is moderately convex and setiferous. The pro- 

 podal finger is about one-half the length of the entire propodus and 

 is tipped at the distal end with a horny, upcurved spine ; the cutting 

 edge is rather broad, with the margins clearly defined and the median 

 area inclined toward concavity and set with small tufts of setae sub- 

 parallel to the margins. The hinged finger is subequal and similar to 

 the propodal finger upon which it fits, the tips crossing. The entire 

 propodus, but more densely so, the dactyli are sparsely covered with 

 long, slender, outstanding setae. 



The second legs are very long and slender; the carpal articles de- 

 crease in the following series : 1, 2, 5, 3, 4 ; the first article being twice 

 the length of the second ; the third and fourth articles each being one- 

 half as long as the second, while the fifth article is one and one-half 

 times as long as the fourth. 



The third, fourth and fifth pairs of legs are similar; the merus is 

 the longest article of each limb ; the carpus is two-fifths as long as the 

 merus and the propodus is three-fifths as long as the merus ; the dactyl 

 is short and pointed; there are four spines on the lateral margin of 

 the propodus. 



Synonymy. — Alpheus houvieri var. chilensis Coutiere, Lenz, Zool. 

 Jahrb. Suppl., vol. 5, 1902, p. 162. — Schmitt, Zoologica, N. Y. 

 Zool. Soc, vol. 5, p. 162, 1925. 



Alpheus vanderbilti, new species. 



Plate 58, text fig. 5, A, B, C. - 

 Name : Dedicated to the collector, Mr. William K. Vanderbilt. 

 Type: An adult female taken in dredge at 20 fms. south of Sand 

 Key, Key West, Florida, January 29, 1924. 



Distribution: Restricted to the type locality. However, it is not 

 improbable that the specimens listed by Coutiere, Zimmer and Schmitt 

 from the Barbados as C. cylindricus Kingley may be C. vanderhilti, 

 as the real cylindricus is a true West Coast species, the type having 

 been taken at Pearl Island, Bay of Panama, by F. H. Bradley, and 



