Mr. RayV AnfwertoDr. Robinfbn. i6$ 



as they are in Bifulc Animals ; and the Authority of 

 Columns as to the Hippopotamus who (had the hind 

 Ungate been like to, and fituate in like manner, as in 

 other Bifulc Animals ) would never have made fuch 

 a Remark upon it, viz. that its Feet were Quadri- 

 fulc. 



As to the fecond concerning the Viper , I believe 

 that the Eggs have no Cohefion with the Uterus^ 

 neither the Young * I have eafily turn'd the Eggs 

 out. And in the Young, when ready for exclufion, 

 I have indeed obferv'd a Navel String* but it feem'd 

 to be nothing but one fingle Membrane, which fer- 

 ved only as an Infundibulum for the Yolk of the Egg 

 into the Inteftine of the young Viper $ juft as I have 

 feen in young Dog-Fijh , in the Belly of the old one, 

 , half, or a good part of the Yolk hanging out of the 

 Body at the Infundibulum. It feems to me not at all 

 likely that Creatures of the fame Genus fhould have 

 a different manner of Generation 5 and we fee this 

 hatching of Eggs, properly fo call'd, in the Belly, 

 exemplify'd in Cartilagineous Fifh. 



I have fome reafon to doubt of what you and Dr, 

 Tyfon write concerning Adders having no Veficula Se- 

 minales. A Male that I difie&ed had a long Veficula, 

 replete with Sperm, (as I took it to be) like the Milt 

 of a Fifh, extending the whole length of the Belly ; 

 .but I did not carefully examine it, and therefore might 

 be miftaken, and it might be nothing but fat. 



B. N. June l. — 92. 



Mr. Ray to Dr. Robinfori. 



/^\UR principal Fhyfician ztBraintree^ Mr. Mlen^ 

 \J my Acquaintance and Friend, hath difcoverd 

 hereabouts flying Glowworms; and I doubt not but 



they 



