486 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. 37. 



PALPHEUS CANDEI Guerin. 



Guerin's type was from Cuba. The figure and description which 

 he gives, although insufficient, apply to the specimens from Tortugas 

 with singular accuracy. The form of the frontal border, sinuous 

 between the spinous orbital arches and the rostrum, the proportion 

 of the articles of the antennule, the stylocerite, the spine of the 

 basicerite, the relative proportions of the two pairs of antennae, of 

 the carpocerite and of the scaphocerite ; all these details agree with 



the figure and the description of A. 

 candei. The stylocerite is, however, a 

 little shorter in the specimens from Tor- 

 tugas. In the drawing by Guerin the 

 scale of the scaphocerite is not distinct, 

 but this inaccuracy may be explained 

 by the long slender form of the scale, 

 the internal border of which is in 

 the prolongation of the strong lateral 

 spine. 



The large chela has its lower border 

 scarcel}' interrupted by constriction and 

 the inferior margin of the article may 

 be called almost straight as in Guerin's 

 description. Also the mero})odites of 

 the third pair are unarmed. Unfortu- 

 nately the single specimen collected by 

 Doctor McClendon has only one mem- 

 ber intact, a foot of the fifth pair, show- 

 ing the bifid dactyl. The third pair is 

 represented on but one side and there 

 only by tlie meropodite. It is therefore 

 impossible to ascertain whether the sec- 

 ond pair is, as Guerin says, much longer 

 than the following. But that is a com- 

 mon character in the " Tnegaclieles" 

 group of species. Consequently, I am 

 strongly inclined to believe that Doctor 



Fig. 1.— Alpheus candei. 6. Infero-ex- 

 ternal surface of large chela. 6'. 

 supero-internal .surface of large 

 CHELA, c. Small chela, d. Mero- 

 podite OF THIRD FOOT. d'. DACTYL OF 



FIFTH FOOT. n. Anterior region. 



McClendon has found Guerin's species in Florida. 



SYNALPHEUS MINUS (Say). 

 SYNALPHEUS TOWNSENDI SCAPHOCERIS, new subspecies. 



I consider this form a new subspecies of S. townsendi Coutiere which 

 differs from the type form in the following points: The carpocerite 

 surpasses the antennule by half its distal article. The scaphocerite 

 has a very broad scale, only 3.8 times as long as wide, this proportion 

 reaching 6 in S. townsendi, 5 in the form hrevispinis. The stylocerite 



