114 Mr. E. J. Miers on the Squillidae. 



angles acute or even forming short spines. First thoracic 



segment not laterally produced ; second and third segments 



not greatly produced, and rounded on the sides. First to 



fourth postabdominal segments with the postero-lateral angles 



rounded ; in the fifth segment this angle terminates in a 



spinule ; sixth segment armed, as usual, with six longitudinal 



spines; seventh with five longitudinal carinas on each side of 



the median longitudinal keel, and Avith six marginal spines, 



between which are some smaller spines (no median spine on 



the posterior margin) . Antennules very robust and greatly 



elongated. Dactyli of the raptorial limbs armed with a small 



tooth or tubercle near the base on the outer margin, and with 



i * • • 



two spines on the inner margin (besides the terminal spine). 



Distal prolongation of the base of the uropoda terminating in 



a strong spine, and with two other spines on its inner margin. 



Length nearly 5i inches. 



Hob. West coast of America. 



In the British-Museum collection are two males from Chili 

 [liev. Mr. Jlennah), another from the same locality {pur- 

 chased) , and another without locality from Mr. BelVs collec- 

 tion. Dana records this species from the Callao Roads. 



P. marmorata, Lockington (P. Cal. Ac. Sci. p. 33, 1877), 

 from San Diego, California, either belongs to this species or is 

 very closely allied to it. The description, so far as it goes, 

 applies very well to it. 



Pseudosquilla Cerisii. 



Squilla Ccritii, Roux, Crust, de la Mediterranee, pl.v. (1828); M.-Edw. 



Hist. Nat. Crust, ii. p. 527 (1887) ; Lucas, Auim. Artie, in Explor. 



Sci. Algerie, i. p. 50 (1849) ; Heller, Crust, siidl. Europa, p. 308 



(18G3) ; Haller, Zool. Anzeiger, p. 207 (1879). 

 Squilla Broadbenti, Cocco, Giorn. di Scieuze di Sicilia, pi. iii. fig - . 2 



(1833). 



The carapace is considerably narrowed anteriorly, and much 

 wider posteriorly than the segments of the thorax ; its antero- 

 lateral angles are unarmed. The rostral plate terminates in a 

 prominent spine, but is without lateral spines ; the sixth post- 

 abdominal segment is armed with six spines ; the terminal 

 segment has seven marginal spines (there being a median 

 spine), and is armed with five longitudinal carinas on each side 

 of the median keel. The antennules are robust, but less 

 elongated than in P. Lessonii. The dactyli of the raptorial 

 limbs are armed with two short spines besides the elongated 

 curved terminal spine. The distal prolongation of the base 

 of the uropoda is apparently slender, terminates in a spine, 

 and is armed with two teeth or spines on its inner margin. 



