82 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxvi. 



jileura also have an obtuse point. In some cases the sex is difRcnlt 

 to determine, as all the pleura are strongly spinous; one can arrive 

 at it, however, to a very great degree of approximation, by noting 

 that the third pleuron in the males is abruptly terminated in a long 

 point, Vvdiile in the female specimens, even those most doubtful as 

 to sex, this point is wide and arched. 



The species appears very homogeneous and I have not been able 

 to separate any variety from the typical specimens. 



Localities : 



Gulf of Mexico, lat. 26° N., long. 82° 57' 30" W., 24 fathoms, 



Albatross Station No. 2413, 320 males, 230 females (with S. 



longicarpus). 

 Gulf of Mexico, lat. 25° 04' 30" N., long. 82° 59' 15" W., 2G 



fathoms, AJhatross Station No. 2414, 1 specimen. 

 Florida, Sugar Loaf Key, 4 sj)ecimens. 

 Bahamas, Eleuthera Island, 2 specimens, male and fenuile 



(largest seen, 12 and 13 mm). 

 St. Thomas, West Indies, "2 specimens. 

 Curasao, Alhat7'oss, 126 males, 167 females, types. 

 Curagao, Albatross, 2 specimens (Cat. No. 7595). 



Tj/pc—Cnt No. 38408, U.S.N.M. 



SYNALPHEUS ANDROSI, new species. 



This species is represented by a shigle female. The frontal margin 

 bears 3 ecjual, obtuse teeth, the rostrum a little less thick than the 

 lateral teeth; the tridentate region is distinct from the rest of the 

 frontal border. 



Antennular articles as 1.7, 1.15, 1. Stylocerite Avide, shorter than 

 the basal article. Superior angle of the basicerite straight, lateral 

 spine reaching the middle of the median antennular article. The 

 scaphocerite is reduced to its lateral spine, which is as long as the 

 antennule, and a little wider than the s})ine of the basicerite. The 

 carpocerite surjiasses the antennule by more than the length of the 

 distal article, and is 7 times as long as wide. 



The proportions of the large chela are: Fingers 1; total length 

 3.4; height 1.4; it is regularly ovoid and the anterior palmar border 

 beais only a weak conical prominence. The meropodite is unarmed 

 on its superior border. 



The small chela measures : Fingers 1 ; total length 2.56 ; height 

 1.2; it is con.sequently short and thick. The movable finger is ter- 

 minated by only one sharp point ; it is strongly curved, stout at its 

 base, and bears an obtuse tubercle at the middle of its lower margin. 

 The carpus measures 0.47 of the whole chela ; it is less thick than the 

 palm, both measured at the distal extremity (0.73). The small claw 

 and the large one have nearly the ratio of 1 to 2. 



