2 c6 NATURAL HISTORY BULLETIN. 



the University Expedition has been compared with the type in 

 the Museum at Stockholm by Dr. Aurivillius who assures me 

 of their identity. 



Carapace with two rounded median prominences, one gas- 

 tric and one cardiac, the former much larger and higher. From 

 the gastric prominence two ridges run divergently backward 

 to the postero-lateral angles of the carapace. Both the median 

 prominences and the ridges are indistinctly tuberculate. The 

 posterior outline is arcuate and is separated from the blunt 

 postero-lateral angles by a broad rounded sinus. The sides 

 of the branchial and gastric regions are steep. Outer margin 

 of the branchial region with a broad and shallow tooth at its 

 middle. Outer margins of the hepatic regions almost parallel. 

 Rostrum proportionally larger than in L. chiragra, deflexed, 

 subtruncate, widening at the extremity which is four-lobed, 

 the median lobes rounded and separated by a narrow U-shaped 

 fissure; outer lobes smaller, blunt, slightly less advanced than 

 the median. Upper surface of rostrum slightly concave in a 

 longitudinal direction. There is a short, acuminate praeorbital 

 spine directed obliquely upward. The legs are furnished 

 with triangular laminate crests of quite different appearance 

 from the knobby protuberances of L. chiragra. 



Dimensions. — Length, 8.8 mm.; width, 8; length of rostrum 

 from base of prasorbital sinus, 2.3. 



28. Stenocionops furcata c^lata [A. Milne Bdzuards) 



( = Pericera c^elata A. Milne Edzvards.) 



Stations 24, 44, 45 and 46, off Key West, shallow water to 

 60 fathoms; Tortugas. 



29. Stenocionops spinosissima (Sausstire) . Type examined 



(=Pericera atlantica Rathbmi). 



Station 24, off Key West, 60 fathoms; station 28, off Sand 

 Key, 116 fathoms; station 39, off Key West, 20 fathoms. 



30. Macrocxeloma trispinosum {Latreille). 



Station 45, off Key West, shallow water; Dry Tortugas; 

 Bahia Honda, Cuba; Bahama Banks; Egg Island, Ba- 

 hamas. 



