FIWCEEDIYGS OF THE XATIOXAL MUSEUM. 



143 



SESARMA BROMELIARUM, new species. 



Length and posterior widtli of carapace nearly e(iual, in large speci- 

 mens exceeding the anterior width; in medium-sized specimens about 

 the same as the anterior width. Eegious strongly marked. Surface 

 punctate, the punct;e irregular and having a tendency to coalesce, 

 making the surface rough and uneven. Anteriorly the surface is very 

 rough with squamose tubercles. Branchial stria^ well marked. Front 

 about four times as wide as its greatest height. Superior lobes very 

 prominent and separated by deep grooves. Lower margin strongly 

 produced in old specimens; median sinus viewed from above, broad, 

 deep, and rounded; on either side a very shallow sinus. Viewed from 

 in front also, the margin appears sinuous. The third segment of the 

 abdomen of the male has oblique margins, the abdomen being widest 

 at the distal end of that segment. The sixth segment is in^oportionally 

 longer than in *S'. cinerea and S. ricordi, and the last segment more 

 oblong. The appendages are two-lobed at the extremity, the inner less 

 advanced than the outer. 



Outer surface of merus and carpus of chelipeds coarsely rugose; the 

 manus is densely tuberculate on the outer side and has large scattered 

 tubercles on the inner side. 



Fingers tuberculate to near the extremity. Meri of ambulatory legs 

 less than three times as long as broad, their transverse rug.e n\uch more 

 prominent than in S. cinerea. The propodi are fringed above and below 

 with stout black bristles. This character is less njarked in small 

 specimens. 



Uimensiont! of Se^^anna bromelianDii. 



Rio Cobre 



Haiti. 



Male. Female. Male. 



Length, from margin of .superior frontal lobes 



Anterior widtli 



Posterior width 



Sujierior frontal width 



Inferior frontal width - 



I).l)th of front 



Length of merus of third ambulatory leg 



Width of same 



tn.m. 

 26.1 

 24.5 



2(;. 2 



i:i. 7 

 13.4 



3.3 

 19.8 



7.0 



Type JocaJlty. — Rio Cobre (St. Catherine), Jamaica; P. W. Jarvis 

 (No. 19400, U.S.N.M.). 

 Range. — Haiti ; Jamaica. 

 Of this crab, Dr. E. A. Andrews' says: 



A peculiar sesarma-like crab is found iu the fresh water rills runniuo- into the Wag- 

 Water River, at lea.st 12 miles from the sea, and was also taken near the Monea^ue, 

 on trees, ^Yhe^e it lives amid the moist bases of the leaves of bromelias. 



'Johns Hopkins Uuiv. Cir., XI, No. 97, p. 75, April, 1892. 



