38 ALLAN HANCOCK ATLANTIC EXPEDITION 



REPORT 



ber of teeth on the raptorial dactylus, and the smaller number of sub- 

 median denticles on the telson. 



Remarks: The color is completely faded except for a few dark 

 chromatophores scattered over the light surface. 



The name is derived from the location of the first lot of specimens 

 examined, St. John in the Lesser Antilles. ■ 



Genus Pseudosquilla Dana, 1852 



This genus has gradually become one of the more diverse and poorly 

 defined of the stomatopod genera. In the western Atlantic, for example, 

 two distinct groups are easily recognized. The first contains P. ciliata 

 (Fabricius, 1787) and P. oculata (Brulle, 1835-44) ; these species are 

 perhaps typical of the genus. In the second group are P. plumata 

 (Bigelow, 1902) and P. maiaguesensis (Bigelow, 1902), which are 

 somewhat aberrant forms resembling both Lysiosquilla and Pseudo- 

 squilla. If Parasquilla were not yet separated from Pseudosquilla, a 

 third distinct group would exist within the genus. The entire genus is 

 in need of revision ; if this is done, it is doubtful whether P. maiague- 

 sensis and its allies can be retained in Pseudosquilla. 



Only two species are known from the northern coast of South Amer- 

 ica, P. ciliata and P. oculata. The latter was reported from northern 

 Brazil by Rathbun ( 1900) and Lemos de Castro ( 1955). P. ciliata is the 

 only species in the present collections. 



Key to the Species of Pseudosquilla From the Atlantic Coast 

 OF Northern South America 



1. Cornea subglobular, only slightly overhanging stalk laterally; 

 rostral plate rounded anteriorly; telson with three longitudinal 



carinae either side of crest P. ciliata 



Cornea expanded laterally, much broader than stalk ; rostral plate 

 spined anteriorly; telson with four longitudinal carinae either 



side of crest 



[P. oculata (Brulle, 1835-1844) ; Brazil, Lemos de Castro, 1955] 



I 



