DESCRIPTIONS OF GENERA AND SPECIES. 



Order STOMATOPODA. 



Family Squillid^. 



Genus Squilla, Fabricius. 



Diagnosis. — Stomatopoda with the sixth abdominal somite separated from the 

 telson by a movable joint ; the hind body depressed and wide ; the dactyle of the 

 raptorial claw without a basal enlargement, but \dt\i a series of spines, which are not 

 usually more than six in number, on its inner edge ; more than four secondary spines 

 between the intermediate and submedian spines of the telson, which is usually longer 

 than wide ; inner spines of ventral prolongation from basal joint of uropod longer than 

 the outer. Larva an Alima with the ocular and antennulary somites not covered by 

 the carapace ; the lateral edges of the carapace not reflected, but usually bordered by 

 small spines or serrations ; the inner spine of the ventral prolongation from the basal 

 joint of the uropod longer than the outer, and the telson with more than four secondary 

 spines between the intermediate and submedian sjjines. 



Remarks. — I have had an opportunity to study the first abdominal appendage of the 

 male in only a few species of Squilla, but this organ has well defined common character- 

 istics in all these species, and we may probably add to the diagnostic characteristics 

 given above, the statement that the inner lobe of the terminal joint of the first abdominal 

 appendage of the adult male is longer than the outer, and separated from it by a suture. 



While recognising the very close relationship between the genus Clilorida (Eydoux 

 and Souleyet) and the genus Squilla, Miers thinks that the former genus is a natural 

 one, which should be retained under the modified name CJiloridella ' to include the 

 Stomatopoda which have the dactyle of the raptorial claw armed with marginal teeth 

 and without a basal enlargement ; the carapace and hind body without longitudinal 

 carinse ; the eyes dilated in the middle and contracted at the tip ; the rostrum short ; 

 the carapace small and short, and the appendages of the thoracic limbs strap-shaped, 



' Miers, On the Squillidje, p. 13. 



