1919-] ^^- Kemp : Notes on Crustacea Dccapoda. 329 



is present in a rudimentary condition in the two largest males. In 

 a series of five specimens recently obtained by Capt. R. B. Seymoui 

 Sewell, I. M.S., in the Gulf of Suez, the tympanum on the upper 

 surface of the last leg is present in two very small specim.ens and in 

 a female of medium size; in a small male and large female it is 

 altogether absent. 



The specimens examined are: — 



i-V-^ Red Sea. Ik-rlin Mus. Three. 



- V - Aden and Mekran coast. ' Inve.stigator.' Tvi^Es l'\)ur. 



of D.'affiiiis, .Mc. 



''^«-' A'm Miisa, ChilF of Sue/. R. B. Seymour Sewell. f^ve. 



Other precisely localized records of D. sulcata are, — Suez 

 (Forskal, Laurie), Tor (Heller), Aden (Nobili) and Djibouti 

 (Nobili) 



Dotilla pertinax, Kemp. 



1915. Dotilla perliiKix, Kemp, Mem. hid. Mus. \', p. 222, pi. xii, fig. 4. 



Examination of further specimens shows that, as in D. sulcata^ 

 the tympanum on the upper surface of the last pair of legs may 

 be present or absent. This character, therefore, will not serve to 

 distinguish the species from Nobili's D. iiialabarica, to which in 

 the pattern of the grooves on the carapace it is clearly related. 



'^■-fp'^ Outer channel of Chilka Chilka Survey, March, Many (incUul- 



Lake, Orissa. Oct., 1914. ing Types i. 



^i^'' Puri, Orissa. S. Kemp ; March, Seventeen. 



1916. 



The specimens obtained at Puri were found at the edge of a 

 small pool of brackish water separated by a sandbank from the 

 open sea. At exceptional tides sea-water made its way into the 

 pool. 



Dotilla malabarica, Nobili. 



190^. Dotilla u/alabarica, Sub\\\. Boll. .U/is. Torino Will, .\o. 4^.', p. Jo. 

 fig. 6. 



I have not seen this species, which is evideiitl}^ closely related to 

 D. pertinax. It differs in the sharply p;mtagonal form of the gas- 

 tric area — clearly shown in Nobili's figures, in the generally 

 deeper sculpture of the carapace and in the absence of a trans- 

 verse groove near the posterior border. The fingers also appear to 

 be much shorter in relation to the palm and the dactylus of the 

 last leg longer, twice the length of the propodus. On actual com- 

 parison of specimens other distinctions will probably be dis- 

 covered. 



Dotilla malabarica is known only from the original examples 

 obtained at Mahe on the Malabar Coast (E. Deschamps coll.). 

 I have endeavoured without success to obtain further specimens. 



Dotilla wichmanni, de Man. 



1S9J. Dotilla wichmanni . de Man, in \Veber'.s Zool. Ei'gehn. Reise Nied. 



()st.-I)!d. II, p. ;,oS, pi. xviii. fig. 8. 

 1S95. Dotilla rviclimanni, de .Man. Zool. Jalirb.. .Sy.^t.. \'III. p. 577- 



