1913-] S. Kemp : Crustacea Stomatopoda of the Indo-Pacific Region. 53 



ally ; in each the posterior lobe is acute and very much broader than the anterior. In 

 the sixth somite the anterior lobe is narrow, acute, and a trifle shorter than the posterior ; 

 in the seventh it is very short and bluntly rounded. The lateral process on the anterior 

 part of the eighth somite is sharply acute. 



There are, as usual, four pairs of longitudinal carinae on the first five abdominal 

 somites and three on the last, and on all the somites except the first and the sixth there 

 is a small transversely-grooved median tubercle. The following carinae end in spines : — 



Carinae. Abdominal somites. 



Submedian . . . . . . 5,6. 



Intermediate .. .. .. 4,5,0. 



L,ateral . . . . . . 4, 5, 6. 



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



The median carina of the telson is well marked ; it is obscurely notched at the 

 base and terminates in a sharp spine overhanging a small tubercle. The dorsal sur- 

 face on either side is finely rugose and is impressed with a number of parallel and 

 oblique rows of pits. These are sometimes confluent and form distinct grooves. The 

 six marginal teeth are well developed, the intermediate pair being sometimes slightly 

 inturned. The praelateral denticle is distinct and at its base and at the base of each of 

 the teeth there is a short rounded carina. There are three submedian denticles, seven 

 or eight intermediate and one lateral. The post-anal carina is well developed. 



The bifurcate process from the base of the uropods is finely serrate along its inner 

 margin. The inner spine is about twice the length of the outer and bears a prominent 

 external lobe near its middle point. 



The two male specimens do not show any marked secondary sexual modifications. 



This species bears a strong superficial resemblance to S. wood-masoni, but may 

 at once be distinguished from it and from all other species of the oratoria group by 

 the form of the eyes and by the number of teeth on the raptorial dactylus. 



As in the specimen described and figured by Brooks there is a well-defined dark 

 patch of colour at either end of the median ridge of the telson. In one of the Indian 

 specimens the posterior margins of the post-abdominal segments are defined by black 

 pigment and, in addition, in the posterior part of each somite except the first and last, 

 there is a dark patch which extends laterally as far as the longitudinal grooves between 

 the submedian and intermediate carinae. There is also on each of the first five abdomi- 

 nal somites a dark sinuous line immediately above the lateral carinae. 



I There are two specimens of S. quinquedentata in the Indian Museum — 

 — Bombay. Bombay Nat. Hist. Soc. 1 d 1 , 103 mm. 



-fjp Balasore Bay, Orissa coast; 15 fms. ' Golden Crown.' 1 c? , ca. 115 mm. (damaged). 



Hitherto this species was known only from the type specimen, a male 136 mm. in 

 length, found by the ( Challenger ' Expedition in the Arafura Sea, south of New 

 Guinea, in 28 fathoms. 



