1913-] S.Kemp: Crustacea Stomatopoda of the Indo-P aci fie Region. 141 



According to the description and figures which Pocock has given, this species 

 differs from 0. japonicus in the following features : — 



1. The rostrum is evenly rounded anteriorly from side to side and is twice (or 



according to the figure rather more than twice) as broad as long. 



2. The breadth of the corneal part of the eye is contained only a little more than 



three and a half times in the median length of the carapace excluding the 

 rostrum. The ophthalmic somite is exposed in dorsal view, and the dorsal 

 process is deeply excavate anteriorly. 



3. The antennal scale is a little shorter than the median length of the carapace. 



4. The raptorial dactylus is armed with nine distinct teeth (including the ter- 



minal one ?). 



5. There are four pairs of longitudinal carinae on the sixth abdominal somite 



as in 0. japonicus, but the feeble median keel found in that species is missing 

 and the proximal tubercle, which is found in most other species between the 

 lateral and outer intermediate carinae, is omitted, possibly by error, in 

 Pocock' s figure. 



6. On the telson there is only a single submedian carina, the first lateral is absent 



and the second lateral instead of fusing with the marginal to form the lateral 

 tooth as in 0. scyllarus and japonicus is parallel to the edge and runs towards 

 the outer margin of the intermediate tooth. 



The number of movable spines on the outer margin of the uropod is not given ; 

 the distal spine is, however, said to reach to the apex of the ultimate segment. 



Pocock records a single female, 60 mm. in length, from the Macclesfield Bank, S. 

 China Seas, in 35 fathoms. 



7. Odontodactylus latirostris, Borradaile. 



1907. Odontodactylus latirostris, Borradaile, Trans. Linn. Soc, Zool. (2), XII, p. 212, pi. xxii, 



figs. 3, 3«. 

 This species is perhaps not distinct from Odontodactylus hanseni. Borradaile 

 does not say anything of the affinities of his new form and was perhaps unaware of 

 Pocock' s work at the time of writing. In the descriptions and figures which 

 the two authors have supplied I am only able to detect the following trifling 

 differences. 



1. The rostrum is a little broader in 0. latirostris than in 0. hanseni, and its anterior 



margin is more definitely truncate. 



2. The raptorial dactylus bears only seven teeth on its inner margin. 1 



3. On the sixth abdominal somite there is the customary tubercle near the an- 



J According to Borradaile's description. In the figure, however, there appears to be an additional 

 tooth lying close alongside the apex and a series of obscure serrations on the external margin of the 

 swollen basal part of the dactylus. The latter feature, which is not mentioned in the text, does not 

 seem to occur in any other species of the genus. 



