. SQUILL 01 DBA. 621 



The denticulations of the hand are very even ; the carpus is without 

 a tooth at apex, and the preceding joint, or arm, is obtuse, and not 

 prominent at lower apex. 



SQUILLA OEATORIA, De Haan. 

 Singapore. 



Length of body, five inches. De Haan states as a prominent dis- 

 tinction between this species and the M. mantis, that the two segments 

 of the thorax preceding the last have either lateral margin strongly 

 bilobate, while they are entire in the Mediterranean species. The 

 preceding segment is bispinous either side, the two spines in nearly 

 the same plane, and the anterior long and flexed directly forward. 

 The outer costa3 of all the abdominal segments are spini-acute behind, 

 the next either side are acute on all but the first segment, and the 

 next on all but the first two, while the median pair are acute behind 

 on all but the first three. The punctate sulci on the surface of the 

 caudal segment are quite decided; the denticles between the spines of 

 the margin are rounded at apex, the median are six in number, three 

 either side of a median incision, the next series eight to nine, and 

 gibbous above at base. The finger of the large chela has six spines, 

 the hand is evenly denticulate on margin ; the carpus has two short 

 obtusish teeth on outer margin ; the preceding joint or arm is acutely 

 produced at lower apex. The antennary segment has a lamina with 

 entire margin on its outer side, and not a spine. The dorsal margin 

 of either caudal appendage has nine moveable spines. The inner 

 branch is shorter than the long furcate spine of the base. 



Squilla mantis auctorum, partim. 



Squilla oratorio,, T>E HAAN, Faun. Japon., 223, pi. 51, f. 2. 



Squilla affinis, BERTHOLD, Kept, aus Neu Grenada und Crustaeeen aus China. Got- 

 tingen, 1846, p. 26, pi. 3, f. 1, 2. 



GENUS PSEUDOSQUILLA. 



Besides the stiffer body, smooth abdomen (excepting two or three 

 posterior abdominal segments), longer carapax, less narrowed before 



156 



