358 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Toro Point, Canal Zone, Panama ; Meek and Hildebrand, Smith- 

 sonian Biol. Survey of the Panama Canal: May 19, 1911; 2 males, 2 

 females (43993). June 24, 1912; 1 male (46687). 



Sabanilla, Colombia; 1884; Albatross; 2 y. (17677), 27 males, 12 

 females (7558). 



Santa Marta, Colombia; C. F. Baker; 1 male y. (22551). 



Venezuela; 1900; Lyon and Robinson; 1 male y. (23799). 



San Julian, Venezuela ; July 17, 1900 ; Lyon and Robinson ; 1 male 

 (23798). 



Macuto, Venezuela; July 29, 1900; Lyon and Robinson; 1 male 

 (23797). 



Guiana; 1 specimen (Paris Mus.). 



Port Castries, St. Lucia; Dec. 3, 1887; Albatross; 9 males (40796). 



Hungry Bay, Bermudas; F. G. Gosling; 5 males, 2 females 

 (25435). 



GECAECINUS QUADKATUS Saussure. 



Plates 121 and 122. 



Gccarcinus qitadmtns Saxjssure, Rev. et Ma}i. tie Zool., ser. 2, vol. 5, 18.53, 

 p. 360. pi. 12, fig. 2 (type-locality, Slazatlan ; type in Geneva Mus.). 



Diagnosis. — Snmll, narrow. Maxillipeds reach epistome or nearly 

 so; uierus not emarginate. Chelipeds unequal. Dactyli of legs with 

 four rows of spines, besides often supernumerary spines above and 

 below. 



Desoiption. — This species is intermediate between G. ruricola and 

 G. lateralis^ and still distinct from both. It has the size and shape of 

 lateralis., and the front and orbits correspond to that species. 



The outer maxillipeds just about reach the epistome ; they are dis- 

 posed as in lateralis., but the merus is rounded or a little truncate at 

 the anterior end, which is not emarginate. 



Chelipeds unequal in both sexes. 



The dactyli of the legs bear sometimes 5 or 6 rows of spines, there 

 being often a row^ of spines along upper and lower surfaces. 



The abdomen of the male is narrower than in G. lateralis., except- 

 ing the seventh segment, which is distinctly more than half as wide 

 as the sixth. 



Measurements. — Male, Punta Arenas, length of carapace 44.7, 

 width of same 55.8 mm. 



Habitat. — Professor Tristan writes of this species that it is found 

 frequently under the trunks of trees, six or eight together, and in 

 the rainy season (June to October) is very abundant. 



Range. — Along the Pacific coast, from Mexico to Colombia. Also 

 at Turbo, on Atlantic side of Colombia. 



