50 



spine at the end of the anterioi- border being large enough to form a chela with 

 the dactylus. 



Abdomen of the male slightly convex along the middle line, the 4th and 5th 

 terga with some little nodules : in the female the 3rd-5th terga have the surface 

 a little uneven, but not distinctly nodular. 



Every specimen has a commensal sponge which covers it completely like a 

 cap. 



In the Indian Museum are 70 specimens from the Andaman reefs. 



The carapace of a large egg-laden female is 9 millim. long and 11 millim. 

 broad. 



705. Port Blair, Andamans. Wood-Mason Coll. 



19-tl-1950 ~1 



7 ' 



^^-,o/,o, >■ Types op the species. Great Coco I. A. Alcock. 



2272-2281 .' 



~~7 J 



55^. Off Little Andaman, ]0 fathoms. "Investigator." 



9 



Gryptodromia canalicidata, Stimpson. Plate II., fig. 8. 



Cryptodromia cancdiculatn, Stimpson, Proc. Acad. Nat. Sci. Philad. 1858 (1859), p. 240. de Man (2-i), 

 Ortmann (82), Alcock (3). 



Dromia tomenfosa, Heller (39). Cryptodromia fomenfosn, Hilgendorf (45), Kossmann (51). ? Cryptodt-nmia 

 penfagonalis, Hilgendorf (45;, Henderson (43), Ortmann (83). 



For references see .T. A. S. B., LXVIIL, pt. 2, 1899, p. 142. 



Tomentum short, close, velvet-like. 



Carapace not quite as long as broad, only moderately convex, its surface 

 smooth, its regions very fairly indicated : the cervical groove is distinct, tlie 

 fronto-orbital region is marked off by a shallow transverse groove that runs 

 forwards from one antero-lateral angle of the carapace round to the other, and 

 the front itself is longitudinally grooved. 



Front cut into 3 broad triangular teeth of nearly equal size, the middle 

 one nearly horizontal, but on a much lower plane than the others, whicli are 

 somewhat upcurved. 



A tooth near the middle of the upper border of the orbit marks the position 

 of the true inner supra-orbital angle. Outer orbital angle dentiform. Infra- 

 orbital lobe dentiform and prominent. 



True antero-lateral borders with 2 teeth of which the anterior is the moi-e 

 prominent and acute: in the well-marked gap between the 1st (large) tooth and 

 the outer orbital angle a stout subhepatic tooth shows up : below this again is a 

 tooth at the outer angle of the buccal cavern. 



