Mr. E. J. Miers on the Squillidse. 109 



versely-oval shape, smooth above. Exposed thoracic seg- 

 ments not produced laterally ; the first segment very narrow 

 and acute on the sides, the second broader and laterally sub- 

 truncated, the third more rounded laterally. The fifth post- 

 abdominal segment bears a small tooth or spine at its postero- 

 lateral angle ; the sixth segment is armed with six spines, 

 the second on each side being placed nearer to the anterior 

 margin. The terminal segment is armed with two longitu- 

 dinal carinas on each side of the median keel (the inner of the 

 two being much less strongly marked), and there is a third 

 carina on each side close to the lateral margin ; there are six 

 lateral spines, the two mobile and submedian spines being the 

 longest. The dactyli of the raptorial limbs are armed with 

 three slender spines (including the terminal spine, which is 

 longest). The terminal spines of the basal prolongation of 

 the uropoda are nearly equal ; and the inner spine is not 

 toothed on its outer margin. Length nearly 3 inches. 



Hob. Indo-Pacific Region. 



The series in the Museum collection includes a female from 

 the Indian Ocean, labelled P. ciliata by Leach, and another 

 without locality {Old Collection), a male and female from the 

 Philippine Islands (H. Cuming, Esq.), two males from the 

 Sooloo Sea (A. Adams, Esq.), a female from Australia 

 (H.2I.S. ' Rattlesnake, 1 Macgillivray), a female from Ovalau 

 in the Fiji Islands {H.M.8. l Herald '), two males from the 

 Sandwich Islands, Honolulu {Lieut. Strickland), a female 

 from Florida Island in the Solomon group {J. Brenchley, 

 Esq.), and one from the Seychelles {Dr. E. P. Wright). 



It is recorded from the Mauritius and Red Sea; Von 

 Martens also records it from Cuba ; hence it would appear 

 that this species, like Gonodactylus chiragra, is not confined 

 in its range to the Indo-Pacific Region. 



The male, according to Mr. G. Clark, who had the oppor- 

 tunity of observing this animal in the living state, is of a 

 beautiful bluish-green colour, with the jaw-feet, swimmerets, 

 and branchiae, as well as the antennas and fimbriae which 

 border the different organs, of a cherry-red. The female is 

 clouded with brown and grey, presenting much the appearance 

 of tortoise-shell ; and the red about her is much less vivid than 

 in the male (P. Z. S. 1869, p. 3). 



Squilla quadrispinosa, Eyd. & Souleyet (Voy. Bonite, Zool. 

 i. Cr. p. 262, pi. v. fig. 1), from the Sandwich Islands, closely 

 resembles this species, but is described as having the left- 

 hand mobile spine of the. terminal segment bifid. Can this 

 be an accidental malformation ? 



