2 MR. W. F. R. WELDON ON THE PLACENTATION [Jail. 15, 



Newton, which I have described and named Phelsuma newtoni in my 

 still unpublished Catalogue of Lizards. 



" It is distinguished from the other species by several important 

 characters. Comparing it with the typical species of the genus, 

 P. cepedianum, from Mauritius and Bourbon, we see that it differs 

 in the much larger size — the largest P. cepedianum measuring 

 hardly 60 millim. without the tail, whilst P. newtoni measures lO.i 

 millim. — the stouter habit, the shorter snout, the very small nearly 

 indistinct chin-shields, the much larger gular granules, the coloration, 

 &c. According to Leguat (as quoted by Dr. Giinther in his paper 

 on the Extinct Reptiles of Rodriguez) two kinds of Lizards lived in 

 Rodriguez in the beginning of the last century — one diurnal, the 

 other nocturnal. The former is no doubt a Phelsuma, as suggested 

 by Dr. Giinther ; and as it is said by Leguat to be a French foot 

 long, there is, it seems to me, little doubt that the two specimens 

 hitherto secured are the survivors of that probably nearlv extinct 

 species." 



Mr. Sclater exhibited, on the part of Mr. Henry Whitely, an 

 immature specimen of the Night Heron (Nycticorax griseus), which 

 had been shot in Plumstead marshes, Kent, on the 3rd December, 



1883. 



Sir Joseph Fayrer exhibited some additional specimens of the 

 horns of Deer gnawed by other Deer, in confirmation of previous 

 remarks on the subject. 



Canon Tristram, F.R.S., exhibited and made remarks upon some 

 specimens of species of the genus Pachycephala which appeared to 

 him to have been ignored or wrongly united to other species in a 

 recently published volume of the Catalogue of Birds of the British 

 Museum. 



The following papers were read : — 



1 . Note on the Placentation of Tetraceros quadricornis . By 

 W. F. R. Weldon, B.A., Scholar of St. John's College, 

 Cambridge, Assistant Demonstrator in the Morphological 

 Laboratory of the University. 



|Keceived December 12, 18S3.] 



In the course of last summer a gravid female specimen of the 

 Four-horned Antelope which died at the Society's Gardens came 

 into my hands for dissection. I take this opportunity of recording 

 a few notes on the structure of the uterus and placenta. 



The external organs of generation were destroyed by rats before 

 the animal was brought to me, so that I was unable to examine them. 

 The upper part of the vagina was lined by flat, stratified epithelium, 



