]82 Zoological Society, 



lateral : in Echidna the prenasal is replaced by scales, and the post- 

 nasal is much developed above the. nostril, v?hich is usually vertical ; 

 in E. Atropos the nostril is vertico-lateral. 



One specimen of this Fipera belongs to the Academy of Natural 

 Sciences of Philadelphia, and another is in the British Museum. 

 For an opportunity of examining and figuring the latter, my acknow- 

 ledgments are due to the distinguished officers of the institution, 

 Drs. Gray and Giinther. 



Record of the Period of Gestation of certain Rumi- 

 nants WHICH breed in the Society's Gardens. By P. 

 L. ScLATER, M.A., Ph.D., F.R.S., etc., Secretary to the 

 Society. 



The period of gestation of certain animals of the class of Rumi- 

 nants which habitually breed in the Society's Menagerie has been 

 ascertained with tolerable exactness. Of course the period is slightly 

 variable ; but the times given in the following list are, on the average, 

 very faithfully adhered to. 



Fam. Cervid^. 



Wapiti Deer {Cervus canadensis). 



Persian Deer (C. Wallichii) 



Barasingha Deer (C Duvaucelii). 



Japanese Deer (C. sika) 



Sambur Deer (C. Aristotelis) ... 



Rusa Deer (C. rusa) , 



Hog Deer (C porcinus) 



Axis Deer (C axis) 



>8 months. 



Fam. Camelid^. 



Lama (Auchenia glama) \\\ months 



Alpaca {A. paces) J 



Fam. Camelopardid^. 

 Giraffe (Camelopardalis giraj^a) .. 15 months. 



Fam. BoviD^. 

 Punjab Wild Sheep (OwcycZocero*) 1 ^ j^onths. 

 Moufflon Sheep (O. musimon) .... J 

 Leucoryx Antelope {Oryx leucoryx) 8 months. 

 Eland Antelope {Oreas canna) . . 9 months. 

 Nylghai Antelope {Portax picta) . Between 8 and 9 months. 



The Hippopotamus has never bred with us ; but I may state that 

 the period of gestation in this animal is knovra to be short. The 

 female in the Amsterdam Gardens, which has twice produced young 

 in that estabUshment, went only 7 months and 16 days on the first 

 of these occasions, and 7 months 20 days on the second. 



