BY P. E. GRANT AND ALLAN E. McCULLOCH. 35 



have the left cheliped with its lower border carinate and serrate, 

 as is typical of C. latens; but these shade off by imperceptible 

 gradations to a form having the lower border simple and the 

 outer surface smooth, which characterise the form C terrce-regince. 



Calcinus gaimardii (M.Edw.). 



1848. Pagurus gaimardii H. M. Edwards, Ann. Sci. Nat. Zool. (3) 



x. p.63. 

 1905. Alcock, Cat. Ind. Decapod Crust. Pt, ii. p. 56, pi. v. fig. 3. 

 Mast Head Island; on the reef; two specimens. 



Diogenes avarus Heller. 



1865. Heller, " Novara " Crust, p.83, pi. vii. fig.2. 

 1905. Alcock, Cat. Indian Decapod Crust. Pt.ii. p. 68, pl.vi. fig. 6. 

 Port Curtis; two specimens dredged in 7 fathoms. 



Diogenes capricorneus, sp.nov. (Plate iii. fi.gs.3-3a). 



Carapace moderately elongated. Cephalothorax somewhat 

 flattened rugose, carrying numerous low tubercles beset with stiff 

 hairs, and two well defined spinules near the cervical groove. 

 Behind this the carapace is naked. 



Front not so prominent as the antennal angles of the carapace. 



Rostriform process narrow, simple, without spinules on its 

 margin, reaching slightly beyond the ophthalmic scales, somewhat 

 expanded posteriorly. 



Eyestalks narrow, elongated, reaching considerably beyond 

 the peduncles of the outer antennae. Ophthalmic scales with 

 three short spines near the distal end of their upper border. 

 The eyes do not quite reach to the end of the inner antennae. 



Antennal acicle with a well defined spine on its distal outer 

 angle. Flagellum not quite reaching the tips of the chelipeds, 

 sparingly setose. 



Left cheliped much more robust than the right, which reaches 

 to the middle of its palm. The merus has a series of minute 

 spines on its upper margin, and is minutely serrulate below. 

 The carpus has three strong forwardly directed spines on its 



