112 Mr. E. J. Miers on the Squillidse. 



(I. c.) to P. ocidata, belong to this snecies, as the rostrum is 

 described as " vorn abgerundet;" and of the terminal post- 

 abdominal segment he observes, " gewahrt man auf der Ober- 

 fliiche mehrere Langsleistchen, und zwar eine lange mittlere 

 imd zwei seitliche." 



Pseudosquilla stylifera. 



Gonodactylus styliferus, M.-Edwards, Hist. Nat. Crust, ii. p. 530, 

 pi. xxvii. tigs. 9-14 (1837) ; Gay, Hist. Chili, iii. p. 225, pi. ii. fig. 3 

 (1849). 



Body smooth and somewhat depressed. Carapace some- 

 what narrowed anteriorly, without a spine at its antero- 

 lateral angles, and rounded and rather laterally produced at 

 its postero-lateral angles. Rostral plate smooth, longer than 

 broad at base, and narrowing\listally. First exposed thoracic 

 segment very short and not laterally produced ; second and 

 third rounded on the sides ; first to fifth segments of the 

 postabdomen with the postero-lateral angles rounded and 

 without spines ; sixth segment armed with eight low obtuse 

 crests, and without spines. Terminal segment with three 

 longitudinal parallel obtuse crests, placed at some distance 

 from one another, with the intervening spaces smooth, with 

 eight large marginal teeth ; between the submedian teeth of 

 the posterior margin is a narrow fissure, and between these 

 teeth and the next on each side a large rounded tubercle. 

 The antennules are robust, but not so elongated as in the 

 species of the next section. The dactyli of the raptorial 

 limbs are smooth and unarmed and acute. The basal pro- 

 longation of the uropoda terminates in a large flattened lobe, 

 which is denticulated on its inner margin and ends in a 

 spine. Length of a male in the Museum collection about 

 5^ inches. 



Hob. Chili. 



A male individual is in the collection from Chili [Bridges) , 

 and a male and female from Coquimbo Bay {Dr. Cunning- 

 ham) . 



This species evidently marks the transition from Pseudo- 

 squilla to Gonodactylus. 



Near to this species perhaps is Gonodactylus ensiger, Owen 

 (P. Z. S. 1832, p. 6), from Valparaiso, which is described 

 as allied to Gonodactylus chiragra, but with the dactylus of 

 the raptorial limbs not ventricose at base, acute on its inner 

 margin, with the rostrum trispinose, the median spine obso- 

 lete. Length 6 inches. 



