1913-] S. Kemp : Crustacea Stomatopoda of the Indo-Pacific Region. 57 



thoracic somites. The posterior half of the fifth abdominal somite between the marginal 

 and lateral carinae and the outer posterior angles of the sixth somite are black. 



The only differences that I have been able to detect between the specimen which 

 Fukuda has described under the name of Squilla quadraticauda and the type of 5. 

 hoops are that in the former example the rostrum is more triangular in outline, the 

 intermediate carinae of the second and the lateral carinae of the first abdominal somites 

 do not end in spines, and the submedian pair of marginal spines of the telson are more 

 divergent and the intermediate pair more convergent. Also, according to Fukuda' s 

 figure, the anterior margin of the ophthalmic somite is not pointed in the Japanese indivi- 

 dual, the antennular peduncle is longer and the teeth of the raptorial dactylus shorter. 



Fukuda' s specimen is much smaller than that from Indian waters and some of the 

 differences noticed may be merely growth-stages. The Japanese example may possibly 

 represent a distinct variety, but there can be little doubt that both individuals must 

 be referred to a single species. 



^ Gulf of Martaban, Burma ; 67 fms. I4°26' N., o,6°23' E. ' Investigator.' r 2 , 89mm. TYPE. 



The example described by Fukuda under the name of 5. quadraticauda is a female, 

 40 mm. in length. It was obtained at Matsuwa, Sagami Province, Japan. 



THE SPECIES OF THE S. NEPA GROUP. 



This group may be briefly defined as containing those species of Squilla which 

 have a series of fine pectinations along the upper edge of the propodus of the raptorial 

 claw, six teeth on the raptorial dactylus (including the terminal one), bilobed lateral 

 margins to the fifth and sixth thoracic somites and eight longitudinal carinae on the 

 first five segments of the abdomen. 



Until comparatively recently all the species which agreed in the above characters 

 were included under a single specific name, Squilla nepa. Bigelow, however, in 1894, 

 redefined Berthold' s S. a finis (=S. oratoria , De Haan) and pointed out the features 

 by which it might be distinguished from 5. nepa. Shortly afterwards two other species, 

 5. foveolata and 5. stridulans, were described by Wood-Mason and during the last few 

 years Nobili and Balss have insisted on the claims of Kossmann's 5. massavensis to 

 specific recognition. 



But even now , the characters of some of the forms are very imperfectly known , 

 and in examining the material at my disposal I have been led to describe three new 

 species and one new variety, all of which appear to be far from uncommon in Indo- 

 pacific waters. Fortunately, I am able to introduce these new forms with a very con- 

 siderable degree of confidence. This is due in the first place to the large and valuable 

 series of specimens in the Indian Museum and secondly to the numerous examples from 

 other sources which I have been able to examine. In particular, mention must be 

 made of the fine series kindly lent by the Trustees of the British Museum. This collec- 

 tion, which contains numbers of specimens recorded by Miers, Brooks, Henderson and 

 Pocock, has enabled me to trace the synonymy of some of the species in a way that 



