Annales des Sciences Naturelles, 



253 



subjects io the scale of animated nature. Commencing therefore 

 with the Vertebrata, the first article which falls under our obser- 

 vation is " On the Vespertiliones of Brazil ; by Isidore Geoffroy 

 St. Hilaire ;" and, singular to relate, the four species described in 

 it appear all to be entirely distinct from any of the new Bats col- 

 lected in the same country by the zealous traveller Spix, whose 

 excellent work on this subject we have recently referred to.* 

 Of these four species, three appertain to the genus VespertiliOy 

 and the remaining one is referable to that of Plecotus. To the 

 former are assigned the following characters. 



V. Hilarii. Ears small, triangular, almost as broad as long, 

 slightly notched at their external margin : body rather longer 

 than the arm and fore-arm ; tail as long only as the fore-arm ; 

 interfemoral membrane naked ; sides of the face naked. 



V. Polythrix. Ears rather small, longer than broad, notched 

 at their external margin ; body about as long as the arm and fore- 

 arm ; tail as long only as the fore-arm ; interfemoral membrane 

 covered in its upper part with scattered hairs ; face almost entirely 

 hairy. 



V. levis. Ears long ; body not so long as the arm and fore- 

 arm ; tail as long as the body ; a few hairs on the interfemoral 

 membrane ; face partly naked. 



Length of the Length of Length of the 



head and body. the tail. fore-arm. 



Eng. Inches. Eng. Inch. Eng. Inches. 



V. Hilarii 2.633 1-925 1-729 



V, Poli/thrix .. ^'200 1-572 1-493 



r. levis 1-572 1-572 1-493 



Distance 

 between the 

 extremities 

 of the wings. 

 Eng. Inches. 



12-733 

 9-982 

 9-982 



The first of these closely resembles the V. Brasiliensis of Des- 

 marest, and is probably identical with that species ; and the se- 

 cond appears to be that which has been termed the Brasilian 

 Pipistrelle. The new species of Plecotus, P. velatus, is brown or 

 chesnut coloured above, and brown with more or less of a greyish 

 cast beneath; the length of its head and body is 2-986 English 

 Inches, of the tail 1-925, of the fore-arm 1.729, and the distance 



* i?ee our last Number, p. 121. 



