454 MR. J. R. HENDERSON— A CONTRIBUTION 



Genus Pseudosquilla, Dana. 



285. PSEUDOSQUILLA CILIATA (Fabr.). 



P. ciliata (Fabr.), Miers, Ann. Mag. Nat. Hist. ser. 5, vol. v. p. 30, pi. iii. figs. 7, 8 (3880). 

 India {Brit. Mus.) ; Madras (J. R. II.). 



Distribution. From the Red Sea to Australia and the Pacific (Fijis, Sandwich Is., &c). 

 It has also been recorded from the West Indies by Von Martens and Brooks. 



Genus Gonodactylus, Latreille. 



286. Gonodactylus chiragra (Fabr.). 



G. ckiragra (Fabr.), Miers, Ann. Mag. Nat. Hist. ser. 5, vol. v. p. 40 (1880). 

 India; Andamans ; Galle, Ceylon (Brit. Mus.). 



Distribution. From the Red Sea and East Africa to Australia, and the Pacific. It is 

 also recorded from the Mediterranean, the West Indies, and the coast of Florida. 



287. Gonodactylus glaber, Brooks. 



G. glabrous, Brooks, 'Challenger' Stomatopoda, p. 62, pi. xiv. fig. 5, pi. xv. figs. 7, 9 (1886). 



Ceylon (Brit. Mus.) ; Tuticorin, Bameswaram, and Silavaturai Par, many specimens 

 (Thurston) ; very common between tide-marks and on the reef at Bameswaram 

 (J. R. H.). 



G. glaber is closely allied to G. graphurus, Miers, but the differences appear constant 

 in a large series ; I have not met with the latter species, nor does the British Museum 

 possess Indian specimens. 



In G. graph urns the first five abdominal segments have a distinct dorsal impressed 

 line or groove (" suture " of Brooks), which, commencing near the mid-dorsal line of 

 each somite, passes to the lateral surface, and takes a rounded anterior curve so as to 

 resemble a fish-hook ; on the fourth and fifth segments the two lateral grooves almost 

 meet in the middle line. Two smaller grooves are also present on the pleura of the 

 same segments, one arising from the convex bend of the hook, the other rising from the 

 anterior margin of the pleuron, and taking a curved course. In G. glaber the dorsal 

 surface of the abdominal segments is perfectly smooth, and merely faint grooves are 

 seen on the pleura. In G. graphurus there is a short median carina on the sixth 

 abdominal segment, placed between the submedian longitudinal elevations ; whereas in 

 G. glaber this carina is usually absent, or at most but faintly indicated. According to 

 Brooks the projections on the sixth abdomiual segment and telson are more sharply 

 defined and less swollen in G. glaber ; but this character appears to be of doubtful value, 

 for in the type-specimen of G. graphurus (originally named by White in MS.) the 

 elevations are sharply defined, and even narrower than in my examples of G. glaber. 



My series includes specimens from 15 mm. in length up to a length of 64 mm. 



Distribution. Samboangan (Brooks) ; Aden ; Massowah ; Eastern Seas ; Sooloo Sea ; 

 Sir C. Hardy's Island, N. Australia (Brit. Mas.). 



