381 



In adult male (a) one notes : (1) The cheliped length exceeds considerably the 

 length of the carapace, whereas Alcock describes his specimens as having these 

 measurements equal ; (2) the fingers are considerably arched and so are well separated 

 at the base when clenched again contrasting with Alcock's description. Alcock 

 does not give the size of his specimens, they are evidently either young or " non- 

 breeding" forms. In the present collection males agreeing with Alcock's description 

 in characters of cheliped have CI. from 18 - 00 to 21'00. 



Doclea gracilipes, Stimpson, 1857 A.l, p. 229. 



Localities : Trincomalee, three specimens ; pearl banks, Gulf of Manaar, two 

 specimens. 



Description: All the examples are young three are males and two females. 

 They fall under Alcock's general description of the species, and are in fairly close 

 agreement with the Doclea sp. of de Man, from Mergui. The smaller of his two 

 specimens T have seen in the British Museum. 



Doclea alcocki, n. sp. Plate I., fig. 5, Plate II., fig. 2. 



Locality :- -Pearl banks, Gulf of Manaar, one specimen. 



Description : A female, non-ovigerous, but, judging from the broad abdomen, it is 

 adult. C.l. (a straight line uniting base of posterior spine to posterior end of rostral 

 groove) =44 '5. Body and legs, except the hands and dactylopodites, are covered 

 with velvet. 



Carapace sub-pyriform rather than sub-globular (PI. II., fig. 2) ; the posterior part 

 of the margin is semicircular, the anterior part (rostrum included) is triangular. 

 Rostrum bifid ; its length (a straight line uniting the tip of a rostral spine to the 

 posterior end of the longitudinal dorsal rostral groove) is - 25 the carapace length ; 

 the length of the free portion of a rostral spine is 0\55 the rostrum length ; the 

 rostral spines are compressed in an oblique plane and curve a little downwards 

 distally. Inter-orbital breadth (a straight line uniting the fissures between the 

 supra-ocular eave and post-ocular tooth of either side) is 0-25 the carapace length. 

 The anterior angle of the supra-orbital eave is produced obliquely forward and 

 outward as a tubercle. There are numerous tubercles (say 56). Of these, eight 

 are in the median longitudinal line and increase in size from before backwards (four 

 gastric of which the most anterior is about one-third the size of the other three, 

 one between gastric and cardiac region, one cardiac, one on posterior border ; the 

 last named is a good deal larger than any of the others (at its base on either 

 side is a smaller tubercle, that on the right quite minute, that on the left strongly 

 developed). Just anterior to this median dorsal row is a pair of small tubercles, one 



