KKACHYUKA. KATHBUN. 145 



DROMIDIOPSIS EDWARDSI, Rathbun. 



Dromia caput mortuum, Milne Edwards, Hist. Nat. 

 Crust., ii., 1837, p. 178. Not Cancer caput mortuum, 

 Linnaeus, 1766. 



Dromidia caput- mortuum, de Man, Arch. f. Naturg., liii., 

 i., 1887 (1888), p. 393, pi. xvii., figs. 5, 5a. 



Dromidiopsis caput -mortuum, Borradaile, Ann. Mag. 

 Nat. Hist., (7), xi., 1903, p. 299. 



Dromidiopsis caput -mortuum, Ihle, Siboga-Exped., 

 Monog. xxxixfr., 1913, p. 28, and synonymy except 

 reference to Linnreus. 



Dromidiopsis edivardsi, Rathbun, Proc. Biol. Soc. 

 Washington, xxxii., 1919, p. 197. 



Seven miles north-north-east of Bowen, Queensland, 16 

 fathoms; E.3136; one male. 



Twenty-five miles south-east of Double Island Point, 

 Queensland, 33 fathoms; E.4473; one female. 



Length of carapace of male 011 middle line 78.2, greatest 

 width 82.2 mm. Length of female 24.6, width 26 mm. 



The male specimen corresponds very well with de Man's 

 description (loc. cit.) of a somewhat smaller male. The 

 first antero-lateral tooth, however, is different on the two 

 sides ; on the right side it is united with the so-called second 

 tooth in a broad, truncate lobe ; 011 the left side it is conical, 

 subacute, and the second tooth is obsolete. 



The young female resembles the male in most respects; 

 it has, however, a subacute tooth, instead of a lobe, on the 

 supraorbital margin; the epistome is more prominent and 

 the tooth at either end is acute instead of tuberculiform. 

 The sternal sulci are as described by Ihle, op. cit., pp. 28-29. 



The species does not quite agree with Borradaile 's defini- 

 tion of the genus (op. cit., p. 298) ; the carapace is broader 

 than long, the efferent branchial ridges though distinct are 

 broken, the fifth leg though longer than the fourth is not 

 nearly so long as the third, overlapping only slightly its 

 propodal segment. 



