538 



Mr. R. Shelford on some 



Petscheiiga Lake and District, July 3rd and I2t/i, 1899. 



XLV. — On some Hornbill Embryos and Nestlings. By R. 



Shelford, B.A. (Curator of the Sarawak Museum). With 



Field-notes by C. Hose. 



(Plates VIII.-X.) 

 The material forming the subject of this paper consists 

 of one 14-days-old embryo of Anthracoceros malayanus 

 (Stage 1) ; a nearly ripe embryo of Buceros rhinoceros, 

 another of Rhytidoceros unduJatus (Stage 2) ; one newly- 

 hatched nestling of B. rhinoceros, two (of approximately the 

 same age) of R. undulatus (Stage 3) ; a six-weeks-old nestling 

 of B. rhinoceros (Stage 4) ; and two young specimens of 

 A. malayanus, just capable of flight (Stage 5). 



I am indebted to Mr. G. J. Sands, Government Planter, 

 for presenting me with the embryo and nestlings of R. undu- 

 latus, and to Mr. C. Hose, Resident of Baram, for the loan 

 of all the rest of the material. To both these gentlemen I 

 herewith beg to tender my most grateful thanks. 



