DESCRIPTIONS OF GENERA AND SPECIES. 
Order STOMATOPODA. 
Family Squillid^e. 
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 with 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 sjflnes. 
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 Chlorida (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 Chloridella 1 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, 
1 Miers, On the Squillicke, p. 13. 
