Boone, Crustacea, Cruises of ''Eagle" and Ara," 1921-28 177 



sharply defined and terminating distally in an acute spine which 

 reaches as far forward as the carpocerite ; the blade is curved as fig- 

 ured. The carpocerite ends beyond the antennule by about half the 

 length of the distal antennular article, and is about one-third as wide 

 as long, slightly swollen. 



The external maxillipeds when extended, reach as far forward as 

 the ninth annulation of the outer antennular flagellum. 



The large cheliped is slightly longer than the carapace, oblong- 

 ellipsoidal, only moderately swollen in the middle and with a small 

 tooth on its outer distal margin, from which a furrow runs inward 

 halfway the width of the inner face of the palm. The total propodal 

 length is about three and a third times its medial width. The carpus 

 is short, cup-like, prolonged downward ; the merus stout with a spine- 

 like point at its inferior distal angle. The smaller cheliped resembles 

 the larger, but has its finger more slender, tapered. 



The second legs are slender; with the carpus five-jointed, the first 

 article equal in length to the other four combined ; the second article 

 one and one-half times as long as the third; the third and fourth 

 articles subequal ; the fifth article subequal to the second ; the cheliped 

 with the fingers a little longer than the palm. 



The third, fourth and fifth pair of legs have the ratios as illus- 

 trated. The merus of the third leg is 3.5 times longer than wide, the 

 carpus slender, the propodus elongate, slender, armed along its inner 

 lateral margin with about seven acute spines ; the dactyl less than half 

 as long as the propodus, its outer margin convex, its inner margin 

 concave, the tip bifid, the outer hook curved, slightly longer than the 

 inner, which latter tooth is thicker. 



Dr. Coutiere described one variety of this species designated 

 elongatus, from South Carolina and Florida; Dr. Verrill added a 

 second variety, carihaea, from Dominica Island, and a third variety, 

 carolinensis from Fort Macon. I now have a fourth variety from 

 Haiti, gonavensis Boone, in manuscript. 



Synonymy: Synalpheus fritzmulleri Coutiere, Proc. U. S. Nat. 

 Mus., vol. 36, p. 36, text figs. 18a to t, text fig. 19, variety elongatus, 

 1909.— Verrill, Trans. Conn. Acad. Arts and Sci. vol. 26, p. 97, pi. 

 22, fig. 6, pi. 29, figs. 1-ld, figs. 3a to c, text fig. 8, 1922.— Schmitt, 

 Bijdragen, tot de Dierkunde, Natura Artis Magister, Amsterdam, Afl. 

 XXIII, p. 66, 1924.— ZiMMER, Zool. Jahrb. suppl. 11, heft 3, p. 382, 

 1913. 



