Boone, Crustacea, Cruise of "Alva," 1931 155 



India: From many localities in the Malabar District, Cochin 

 State, Travancore State, Godaveri District, Rajahmundry and 

 Cocanada, Chingleput District, Red Hills, and other localities near 

 Madras ; from salty water, backwaters of Cochin State near Erna- 

 kulam. Salt water records for this species are very rare (Hen- 

 derson and Mathai). A large series, from Bombay, Ganjam, Cal- 

 cutta, Sunderbunds, Sittoung, Burma (Henderson) ; Tavoy 

 (Day) ; Burma (Gates) ; Chilka Lake, Orissa coast, and Garia, 

 near Calcutta (Kemp) ; Patani River (Kemp) ; Malay Peninsula, 

 f reshwaters of Patalung River, from market, at Lampam ; Sing- 

 gora, Tale Sap (Kemp) ; Tale Sap (Lanchester) ; Indo-China, 

 Saigon, Bangkok, Siam (de Man) ; Java, Bali (Miers) ; Mergui 

 (de Man) ; Halmahera Islands, Tobels, Borneo (de Man) ; nu- 

 merous localities in the Philippine Islands (Cowles) ; Kalau, New 

 Guinea (Nobili). 



Material examined: Three large specimens, male and fe- 

 male, from Georgetown, Penang, Malay Straits, November 18, 

 1931. 



Technical description: Adult male: The rostrum is long, 

 extending beyond the scaphocerite by about one-fifth of its length, 

 deflected toward the median portion and thence curved upward ; 

 rostral formula of dentition, twelve to sixteen on the superior 

 margin and ten to fourteen teeth on the inferior margin, with the 

 proximal two or three teeth on the carapace ; these separated more 

 from one another than are the others. Adult female : The rostrum 

 is less deep than in adult males, but is usually more strongly up- 

 curved distally than in males. The carapace is stout, with a strong 

 antennal spine, which is buttressed posteriorly by a short ridge. 

 Immediately behind this there is a second acute, but smaller, spine. 

 The anterolateral angle is rounded. The abdominal terga are com- 

 pact, with rounded dorsum. The telson is elongated, narrowed 

 distally with an acute tip, armed with an inner pair of subterminal 

 spines, which are longer than the related pair of outer subterminal 

 spines, but are shorter than the apex of the telson. The uropoda 

 are those typical of this genus. 



The first three pairs of legs are chelate. The first pair is 

 small and quite slender and affords no diagnostic features. 



The second pair of chelipeds is greatly developed. In an adult 

 male, they are one and one-half times the length of the entire 

 body, while in an adult female these second chelipeds are half to 



