1913O S. Kemp : Crustacea Stomatopoda of the Indo-Pacific Region. 143 



On the telson (fig. 106) the carinae are similar to those of the two preceding species. 

 The intermediates are continued to the apices of the submedian teeth, and the second 

 lateral is parallel to the external edge and does not run to the tip of the lateral tooth. 

 In the bifurcation between the submedian teeth there are twelve to sixteen pairs of 

 minute spinules ; there are two sharp-pointed denticles between the submedians and 

 intermediates and one between the intermediates and laterals. 



The outer of the two spines forming the bifurcate process of the uropod is one and a 

 half times as long as the inner and reaches to the apex of the endopod. On the basal 

 segment of the exopod there are ten or eleven (rarely nine) movable spines, the outer- 

 most reaching almost or quite to the apex of the ultimate segment. 



The specimens in the collection vary considerably in length, but the proportional 

 size of the eye remains approximately constant. 



There are seven examples of Odontodactylus southwelli in the Indian Museum : — 



Andarnans. 



' Investigator.' 



i9 



37 mm. TYPE. 



Andamans ; 53 fms. 



' Investigator.' 



id 1 



2 9 , 22 — 31 mm 



Off Cinque Is., Andamans ; 20 fms. 



' Investigator.' 



19 



22 mm. 



Off Interview I., Andamans. 



' Investigator.' 



zâ 



ca. 28 mm. 



N. Cheval Paar, Ceylon. 



T. Southwell. 



I? 



21 mm. 



9. Odontodactylus brevirostris (Miers). 



1884. Gonodactylus brevirostris, Miers, Voy. H.M.S. ' Alert,' p. 567. pi. Hi, fig. C. 



1894. Odontodactylus brevirostris, Bigelow, Proc. U.S. Nat. Mus., XVII, p. 496. 



1906. Odontodactylus brevirostris, Tattersall, Ceylon Pearl Oyster Rep., V, p. 172, pi. ii, figs. 16-18. 



1907. Odontodactylus brevirostris, Borradaile, Trans. Linn. Soc., Zool. (2), XII, p. 212. 



Odontodactylus brevirostris is easily distinguished from all other species of the same 

 group {i.e. those with more than three teeth on the raptorial dactylus) by the complete 

 absence of lateral carinae in the anterior part of the telson. 



The rostrum is more than two and a half times as wide as long, and its lateral and 

 anterior margins form an evenly rounded curve. The middle of its distal margin is 

 slightly depressed. The dorsal processes of the ophthalmic somite consist of a pair 

 of upstanding triangular projections placed close together near the middle line and in 

 dorsal view almost concealed by the rostrum. The eyes are large. The breadth of the 

 cornea is contained about two and a half times in the median length of the carapace, 

 excluding the rostrum. 



The dactylus of the raptorial claw is only very slightly swollen at the base. It is 

 sharply notched at the proximal end of its external margin and bears six to nine (usu- 

 ally seven or eight) teeth, not reckoning the spinous apex. 



The lateral margins of the sixth and seventh thoracic somites are rounded, not 

 truncate, and are of equal width. The fourth and fifth abdominal somites are spinous 

 at the postero-lateral angles and show feeble indications of a lateral depression similar 

 to that noticed in 0. scyllarus. The sixth abdominal somite bears six longitudinal 

 carinae all of which terminate in spines. The inner intermediate carina found in the 



