128 CAEINAT^. 



the frontal region flat, with but little cancellous tissue. Coracoid 

 stout. Manus armed with an ossified tubcrosit)'. Neck and feet 

 long. Delto-pectoral crest of humerus aborted. 



This genus connects Didiis with the Columhidce. The male is 

 much larger than the female. 



Pezophaps solitaria (Gmelin '). 



Syn. Dklus soh'farius, Gmelin". 

 Didus nazarenus, Bartlett '. 



The type and only described species. For full description see 

 A. and E. Newton, ' Phil. Trans.' 1869, p. 327 et seq. 

 Hub. Kodriguez. 



Thefolloiving specimens were obUtined from Cavern-deposits, 

 Rodriguez (^Transit of Venus Expedition). 



A. 133. The left humerus, with the two extremities imperfect. 



A. 133 a. The proximal half of the right humerus. 



A. 133 a'. The right tibio-tarsus of a male. 



A. 133 a". The distal extremity of the right tarso-metatarsus of a 

 female. 



A. 133 a'". The left tarso-metatarsus of a male. 



A. 133 b. The third cervical vertebra. 



A. 133 C. A middle cervical vertebra. 



A. 133 d. An imperfect later cervical vertebrae. 



A. 133 e. The right coracoid. • 



Genus DIDUS, Linn.* 



The type genus. SkuU with a very large and deeply hooked 

 rostrum, and the nasal and maxillary processes of the premaxillas 

 converging anteriorly ; the front region inflated into a sub-conical 

 prominence of cancellous tissue. Neck and feet shorter than in 

 the preceding genus. Delto-pectoral crest of humerus distinct. 



' Syst. Nat. vol. i. p. 728 (1788).— i)i*«s. 



2 Loc. cit. 



3 Proc. Zool. Soc. 1865, p. 199. 



* Syst. Nat. ed. 12, vol. i. p. 267 (1766). 



