NO. 1659. AMERICAN St^EVIEti OF SYNALPHEUS—COUTIERE. 



89 



the dact}'! are divergent, the ventral stronger, almost perpendicular 

 to the inferior margin. 



The height of the telson equals 1.5 times its base, 3.5 times its 

 jDosterior margin. The latter has two pairs of weak spines, between 

 which the convex margin bears 7 to 8 plumose hairs. The outer 

 uropod carries a movable spine between two teeth slightly marked. 



The length of the cephalothorax is 3 mm. 



Localities: 



Jamaica, Albatross, 188-1, 2 specimens. 



Near Monosquillo, 42 fathoms, Albatross Station No. 2142, 1 

 specimen, type, Cat. No. 7770, U.S.N. M. 



LIST OF EXTRA-AMERICAN SPECIES IN THE COLLECTION OF THE 

 UNITED STATES ^NATIONAL MUSEUM. 



SYNALPHEUS ALBATROSSI, new species. 



This species, represented by only one female specimen of .small size, 

 belongs in the C'omatularum group, which it binds to the other 

 groups of forms in a very instructive manner. 



Fig. 54. — SvN.vLrHEU.s albatrossi. a, frontal and antennal region ; K, large chela ; 



K", CARPUS AND MEKOPODITE OP LARGE CHELIPED ; k, SMALL CHELIPED OF FIRST PAIR; 

 I, FOOT OF SECOND PAIR ; m, FOOT OF THIRD PAIR ; m', DACTYL OF THIRD PAIR. 



The frontal spines are large, almost equal in length and with con- 

 cave borders; rostrum wider than the lateral teeth. The antennular 

 peduncles are short and stout, the stylocerite equal to the basal article. 



