DECAPOD CRUSTACEANS OF THE WEST INDIES 175 



along anterior margin of epigastric lobes, two or three small ones in 

 anterolateral portions of protogastric regions, and one pair in mesial 

 hepatic region. Posterior portion of carapace with two pairs of spots 

 in anterior branchial region; an elongate, horizontal, symmetrical, 

 laterally trifoil spot along anterior margin of cardiac area; a pair of 

 small ones in posterior cardiac area; a small pan* in branchial region 

 at end of horizontal spot, and prominent pair of round ones in postero- 

 mesial branchial region. Appendages uniformly tan except for follow- 

 ing darker bands: second pereiopod with bands on distal portions of 

 merus, carpus, and propodus; third pereiopods with bands on distal 

 portions of merus and propodus and upper distal stripe on latter; 

 fourth and fifth pereiopods mth distal band on merus, carpus, and 

 propodus and stripe on upper margins of latter two podomeres. 

 Lower surfaces also orange tan but slightly lighter in color than upper. 

 Some individuals with greenish suffusion underlying tan, thus green- 

 ish tan rather than orange tan. 



Material examined. — The Dominican collections contain 6 males 

 (carapace lengths 3.7-7.1 mm) and 6 females (cl 4.1-7.2 mm), in- 

 cluding 2 with eggs (cl 5.6 and 6.9 mm). 



Ecological notes. — This small crab is known from only two 

 localities on Dominica but it is almost certainly widely dispersed 

 along the high tide and intertidal zones around the Island. At Tarou 

 Cliffs (pi. 3b) it is found in the splash area along the rocky beach, 

 and a number of individuals were seen on a cobble beach on the 

 Avindward side of the isthmus at Scotts Head. In the latter locality, 

 it was found along with Petrolisthes quadratus and Geograpsus lividus 

 (see "Ecological Notes" for P. quadratus). 



Distribution. — Bermudas and southern Florida to Brazil (Ber- 

 mudas, San Salvador I., Cuba, Jamaica, Hispaniola, Puerto Rico, 

 Saint Croix, Dominica, Islas Los Roques) ; eastern Atlantic from 

 Senegal to the Congo. 



Dominica Stations: 6, 110 (0-3 ft.). 



Remarks. — One of the four females collected at Tarou Cliffs in 

 January and one of the two females from Scotts Head in February 

 are ovigerous. All of those from the latter locality are smaller than 

 the smallest one taken at Tarou Cliffs, but even the smallest female, 

 with a carapace length of only 4.1 mm, has the abdomen fully formed. 



Genus Metasesarma 



66. Metasesarma rubripes (Rathbiin) 



Figures 56, 58e 



Sesarma (Holometopus) rubripes Rathbun, 1897a, p. 90 [type-locality: Salvador, 

 Estado da Bahia, Brazil]. 



