KINGSLEY ON THE GENUS ALPHEUS. 191 



sligbtly tapering toward the extremity ; a strong spine above, and a 

 smaller one near it, at the articulation of the dactylus; thumb short, 

 dactylus longer, about one-half as long as the palm. The carpus viewed 

 from the side is somewhat sigmoid in outline; a strong spine upon the 

 upper margin. Meros triangul'ar, sides flat; distal portion of upper 

 margin prolonged into a spine. Smaller hand somewhat similar to the 

 larger; the fingers, however, being equal, slender, and proportionately 

 longer than in the larger hand ; carpus and meros smaller than on the 

 other side, and somewhat compressed. Ischium and meros of second 

 pair compressed; carpus five-jointed, first joint equalling the other four 

 in length ; second, third, and fourth subequal ; fifth slightly longer. 

 Feet of the last three pairs compressed ; propodus spinulose on the in- 

 ferior margin; dactylus biungulate. Telson tapering ; extremity rounded. 



The majority of specimens of this species that I have seen are quite 

 small, averaging ] l.S"''" in length. A larger specimen, from Fort Jeffer- 

 son, Florida, gave the following measurements : — Length of body, 26.3°^™ ; 

 carapax, lO.S'^'^ ; basal scale of antennae, S.S""™ ; larger hand, 13.3™™. In a 

 large series of this species, I find the shape of the larger hand as con- 

 stant as any other character. In some specimens, the ocular spines are 

 present, while the rostrum is wanting ; in others, the front is truncate, 

 no spines being present. The proportions of the joints of the carpus of the 

 second pair also vary. While in the majority of the specimens examined 

 they are as given above, in others the first is scarcely longer than the 

 two succeeding. I have examined specimens of this species from Fort 

 Macon, K C. {Dr. H. G. Yarroio), Charleston, S. C, Key West, Fla. {A. 

 S. Packard^ jr.), Nassau, N. P. A single specimen was sent me from 

 Yale, bearing the label " Bermudas, G. B. Goode ", and identified as 

 Alplieus formosus Gibbes. It agrees well with Gibbes's description 

 quoted above; but as far as I can see there is nothing to separate it 

 from A. minus. The relative lengths of rostrum and ocular spines can be 

 of no great importance when they vary as I have shown. Specimens in 

 the museum of Yale College, from "Pearl Is., Bay of Panama, F. 

 H. Bradley", I cannot separate from Floridan examples. The spines 

 on the front are more acute, and the rostrum somewhat longer than in 

 east-coast specimens. The antennular spines also are not incurved. 

 Other than these, I can detect no important points of difference. 



The only other species of Decapoda that I know of as being reported 

 from both coasts are : — 



Microphrys loeddillii Edw. {fide A. Edw.). 



Eyas coarctatus Leach {fide Stm. Jour. Bost. Soc. Nat. Hist. vi. 450). 



AcantJionyx petiveri Edw. {fide Stm. Ann. N. Y. Lye. 97). 



Domecia Jiispida Souleyet {fide Stm. Ann. Lye. vii. 218). 



EripMa gonagra Edw. {fide Stm. Ann. Lye. vii. 217). 



Achelous spinimanus De Haan {fide A. Edw.). 



Cronius ruber Stm. {fide Stm. Ann. Lye. vii. 225). 



Garcinus moenas Leach. (Prof. S. I. Smith in letters reports this as 

 collected by F. H. Bradley at Panama,) 



