Boo7ie, Crustacea, Cruises of ''Eagle" and "Ara," 1921-28 173 



Genus : SYNALPHEUS Bate. 

 Synalpheus brevicarpus (Herrick). 



Plate 62. 



Type: Collected in a green sponge, found on the reefs of Bahama 

 Islands. 



Distribution: Known from Florida, the Bahamas, Curacao and 

 Porto Rico. The "Ara" specimen establishes the first record of the 

 species from Haiti. 



Material Examined : One specimen, an ovigerous female, taken at 

 Carenge Bay, Le Mole, Haiti, February 4, 1924, by the "Ara." One 

 female, ovigerous, from Pigeon Key, Fla., April 7, 1923. A male and 

 an ovigerous female from Limon Bay, Panama, 1928. 



Technical description: Female: Animal robust, carapace about 

 15 mm. long, abdomen about 28 mm. long. Teeth of the frontal mar- 

 gin three, each an equilateral triangle, the median tooth slightly in 

 advance of the submedian teeth, from which it is separated by a shal- 

 low U-shaped sinus. Eyes subcircular, shielded, one each behind the 

 lateral tooth. Abdomen stout, with the epimera well developed, 

 rounded, forming a deep brood pouch. Telson one and one-half times 

 as long as the preceding segment, wider basally, narrowing distally, 

 the terminal margin convex and armed on each side with two spines 

 at the postlateral angle and margin ciliated. Two pairs of submedian 

 spines, articulated, occur on the dorsal surface of the telson. The 

 peduncle of the caudal fan is produced to a slender, attenuated spine 

 at the outer angle and has a smaller spine at the outer angle of that 

 portion of the peduncle above the inner blade. Both blades are broadly 

 oval, the outer one wider than the inner and armed with two articu- 

 lated teeth at the outer distal angle. Both blades are heavily ciliated 

 with stiff, close-set hairs. 



The stylocerite is very slender, extending to two-thirds of the length 

 of the fourth peduncular segment and has the proximal outer lateral 

 margin a trifle convex, thence converging in an oblique line to the 

 very slender, acuminate apex. The third and fourth antennular 

 articles are elongate, subequal; the fifth article is about half as long 

 as the first ; the outer whip is a trifle thicker basally and shorter than 

 the inner whip by about twelve rings. 



The antennae have the basicerite angulated at the inner distal mar- 

 gin, the outer part produced into a tapering, acuminate process that 

 reaches halfway the length of the thickened outer lateral margin of 

 the scaphocerite. The carpocerite is slender, cylindrical, the distal 



