1913J S. Kemp: Crustacea Stomatopoda of the Indo-Pacific Region. 187 



The telson is considerably broader than long. The median elevation is low, some- 

 what triangular in shape, and is continued to the posterior margin as a pair of blunt 

 ridges. The submedian elevations are oval and extend posteriorly to the extreme 

 distal edge where each terminates in a small submedian tooth. These three elevations 

 are bounded by furrows and their margins are characteristically incised by numerous 

 grooves running towards the centre of each. Along the lateral edges of the telson 

 there are four blunt ridges ; the innermost projects as an intermediate tooth on the 

 distal margin, while the three others are united posteriorly to form a lateral tooth. 

 The median fissure is well-marked ; it is cut right through the telson for nearly half 

 its distal length and is continued forwards on the dorsal surface as a deep groove. 

 The convex margins between the submedian teeth bear a series of spinules, the outer- 

 most of which is larger than the rest, and there is in addition a small spinule on the 

 inner aspect of each of the two lateral teeth. 



The inner spine of the process from the base of the uropods is more than half the 

 length of the outer, and the proximal segment of the exopod bears eight to ten movable 

 spines on its external edge. 



In small specimens, up to 12 mm. in length, the grooves on the last two abdominal 

 somites are imperfectly developed, but the characteristic sculpture is found on the 

 telson. 



Comparison of Brooks' figures of Pvotosquilla cerebralis with Wood-Mason's type 

 of G. glyptocercus leaves no doubt that the two forms are synonymous, as de Man has 

 already suggested. The Indian specimens, however, differ from the figures in the 

 ' Challenger ' report in the particulars mentioned by Fukuda. 



The dorsal surface of many preserved specimens is closely mottled with dark 

 pigment except on the last abdominal somite and telson. Other specimens are pale 

 with four dark spots on the sixth thoracic somite and dark median patches on the 

 seventh thoracic and first and fourth abdominal somites. 



There are sixteen specimens in the Indian Museum, registered as follows : — - 

 ~ Nicobars. S. Kurz. 1 ? , 25 mm. TYPE. 



295'J j 



5S06-17 f Gt. Coco I., N. Andamans. ' Investigator. ' 6 d 1 ,8 ? , io"5-29 mm. 



7 -^' Kabusa Is.. Mergui Archipelago. ' Investigator.' 1 2 , 21 mm. 



Gonodactylus glyptocercus has also been recorded from the Fiji Is. (Brooks) ; 

 Rotuma,the Royalty Is. and New Britain (Borradaile) ; the Ogasawara Is. (Fukuda) ; 

 Ternate (de Man) and Pulo Edam, near Java (de Man). 



21. Gonodactylus excavatus, Miers. 

 Plate X, figs. 122, 123. 



1880. Gonodactylus excavatus, Miers, Ann. Mag. Nat. Hist. (5), V, p. 123, pi. iii, figs. 11, 12. 

 1886. Protosquilla excavata, Brooks, Voy. H.M.S. ' Challenger,' XVI, Stomatop., p. 78. 

 1893. Gonodactylus excavatus, Pocock, Ann. Mag. Nat. Hist. (6), XI, p. 476. 



