678 Trench National Injlitute. 



India, where it denotes the common crocodile, and from 

 which it miift have been introduced into America by the 

 Spaniards or the Dutch. 



The author has not comprehended in his refcarches the 

 long beaked crocodile, or the gaviul, which forms, by gene- 

 ral acknowledgment, a peculiar fpecies. 



On two ncio Kinds of oviparous Quadrupeds. 



Thefc two fpecies, defcribcd bv Laccpede, are interefting 

 not only on account of their novelty i they are interefting alio 

 as they exhibit a number of toes not before obferved but in 

 the clal's of reptiles. 



The firft, which Lacepede calls monodaByhs, has indeed 

 only one toe on each foot. Thefe feet are fo (hort, and the 

 bodv and tail fo long, that the animal has a great rcfcm- 

 b.'ance to a hiake; it is covered with fcales difpofed in 

 iranfverral hands. 



The other fpecies, called tetradaSlylos, has feet as fliort, 

 aiid a budv as long, as the preceding; but each foot is tur- 

 niilied with four toes, and the body is marked on each fide 

 with a longitudinal furrow. 



Thefe two fpecies will form hereafter two new genera in 

 Laccpede's genera of lizards. 



On a new Kind of Infers called Atra6loceros. 



This infeft was brought from the kingdom Owara, in 

 Africa, bv Palifot-Beauvois. The name given to it by that 

 traveller ligiiifics \he fpindle horn, and indeed fuch is the 

 form of its antennae. It is diftinguiflied from other coleop- 

 tera by its wings being much longer than the cover, and not 

 folding under ihem, and by having five articulations in all 

 the tarfi. This laft charafter brings it near to the Jlaphilini, 

 while the preceding gives it an analogy to the necjuiales. 

 The form of its antennulae is very fingular. C. Beauvois 

 thinks that this infeft lives in the woods. 



ANIMAL PHYSIOLOGY. 



On the Quantity of Air ncceJJ'ary for the Htfpiration of a cer- 

 tain Number of Individuals in a Space where it is not 

 renewed. 



Experiments made with machines proper for navigating 

 under water, made laft year at Havre, and lately by the 

 Englifli engineer Kolkeftonc, made Guyton conceive the idea 

 of comparing, on that fubjecl, the confequenccs of the che- 

 mical theorv of refpiration, the refults of obfervalions made 

 under the diving-bell, and the attempts made for the fame 



purpofe 



