1913-] S. Kemp: Crustacea Stomatopoda of the Indo-Paciftc Region. 75 



inner margin are shorter and stouter and the incisions between them are less 

 deeply cut. 

 7. The margin of the bifurcate process of the basal segment of the uropod, anterior 

 to the lobe on the outer face of the longer spine, is sharply concave as in 

 S. oratoria ; the lobe itself is, however, much smaller and less conspicuous than 

 in that species or than in 5. interrupta (fig. 65). 

 In this species, also, the cervical groove of the carapace is exceptionally deeply- 

 cut and the spines at the antero-lateral angles are (in adults) unusually small." The 

 rostrum is sub quadrate, with its lateral margins slightly convergent anteriorly. The 

 lateral processes of the thoracic somite are decidedly shorter than in the two preceding 

 species, especially the anterior one on the fifth somite. The following abdominal 

 carinae end in spines : — 



Carinae. Abdominal somites. 



Submedian .. .. ... 5.6. 



Intermediate .. .. .. 3, 4, 5, 6. 



Lateral . . .. .. .. 2, 3, 4, 5, 6. 



Marginal .. .. .. 1,2,3,4,5. 



The post-anal carina on the ventral surface of the telson is, as a rule, longer than 

 in the preceding species and on the margin there are two or three submedian denticles, 

 eight to eleven intermediate and one lateral. 



In a very young example from Muscat 1 (34-5 mm.) the lateral margins of the 

 rostrum are more strongly convergent anteriorly than in adults and the tubercles on 

 the raptorial carpus are less distinct. In this example, moreover, the carapace is not 

 so wide as in adults, the breadth being a trifle less than one-half the length including 

 the rostrum. The great breadth of the carapace is, in Indian waters, a very marked 

 character of this species and is quite constant in all examples except the two immature 

 individuals mentioned ab ove . Two large specimens from Zanzibar are , however , wholly 

 abnormal in this respect, for, in both, the breadth of the carapace, as in the preceding 

 species, is very clearly less than half the length including the rostrum. In other respects 

 they agree closely with the remaining specimens, and there is little doubt that they 

 may safely be referred to 5. wood-masoni. Should further collections show that the 

 character is constant in specimens found on the E. African Coast the creation of a 

 distinct subspecies will, I believe, be justified. 



Of this species fifty-four specimens have been examined . The following are in the 



Indian Museum : — 



^p- e Hongkong. Hongkong Museum. 3 ? » 66— r3i mm. 



~ Port Jackson, N. S. Wales. Australian Museum. 19.144 mm. 



^ Pondicherry. (Purchased.) 1 9 , 107 mm. 



3J ^ Madras. (Purchased.) 5 d 1 , 3 ? , 89—109 mm. 



TYPES. 



1 This specimen was identified prior to the examination of a series of S. massavensis. It is not 

 improbable that this example along with that from Aden should more properly be referred to that 

 species. 



