JS71.] DR. J. E. GRAY ON THE BRADYPODID.E. 437 



fjlainvillei or cuculliger ; but it is most probably the former, as he 

 says that the throat is brown. 



Cuvier, in the 'Animal Kingdom,' edit. 1, vol. i. p. 217, says, "Sa 

 couleur est grise, souvent tachetee sur le dos de brun et de blanc ; 

 plusieurs individus portent entre les epaules une tache d'un fauve vif 

 que traverse une ligne longitudinale noire. On ignore s'ils forment 

 espece." He adds, "On connait un A'i dit le dos briile, parce qu'il 

 a entre les e'paules une tache noire entouree de fauve ; ce n'est selon 

 M. Temminck, qu'uue varie'te resultant de ce que des longs poils 

 de ses epaules sont uses." (Cuvier, Reg. Animal, ed. 2. p. 225.) 



Dr. John Wagler, in the 'Isis' for 1831, p. 604, wrote an essay 

 on the genus Bradypus, of which he notices four species : — 1 . B. cu- 

 culliger, from Surinam, Cayenne, and Guiana ; 2. B. ai, from Brazil ; 

 3. B. torquatus, Brazil; 4. B. infuscatus. He considers the female 

 of B. cuculliger and B. infuscatus distinguished by an orange or 

 yellow spot on the middle of the back between the shoulders ; for 

 he says particularly in the description of B. cucidliger, " Macula 

 spinae dorsi (in fcemina) pone humerum subrotunda, lsete auran- 

 tiaca, medio longitudinaliter vitta aterrima dissecta" (p. 605), and 

 that, in B. ai, "Macula spinse dorsi (in foemina) pone humerum 

 subrotunda, pilis adjacentibus plus miuusve tecta, fuscescenti-flavida, 

 vitta per medium nigrescente longitudinaliter signata; pili hujus 

 maculae mollissimi sunt, quasi sericei ;" and he describes a new 

 species under the name of B. infuscatus with the following cha- 

 racter : — "Intense fuliginoso-fuscus, seriebus macularum in dorso 

 fuscescenti-albarum longitudinalibus quatuor ; fronte temporibusque 

 flavido-albis ; vitta utrinque pone oculum oblique ad mentum de- 

 ducta distinctissima fusco-atra inferius flavido-albo limbata ; collo 

 toto anteriore ac gastraeo notaei colore, immaculatis. Adult. 



" Pili appressiores quam in speciebus praecedentibus, multo bre- 

 viores, ungues ac extremitates longiores, multo graciliores ; hi fusce- 

 scenti-flavi ; pedes supra albido maculati. 



" Longitudo 1' 11", caudee 1" 11'", antibrachii, exclusis unguibus 

 15", scelidum 8" 2". 



" Habitat in Brasilia versus Peru." 



Dr. John Andreas Wagner, in the Supplement to Schreber's 

 ' Saugthiere,' iv. 1844, p. 132, describes four species of Bradypus 

 (including B. torquatus) ; but he evidently regards the orange mark 

 on the back as the character of the male, and not of the female as 

 Wagler had considered them. 



1. B. pallidus, Wagner, he says, is B. tridactylus of Cuvier, and 

 B. ai of Wagler; and at p. 143 he gives to it the following cha- 

 racters : — ■ 



" B. e rufescente pallide cano-lutescens; notaeo longitudinaliter albo- 

 maculato ; fronte alba ; vitta utrinque post oculum oblique ducta 

 fusea ; collo gastraeoque notaei colore, immaculatis ; macula dorsali 

 aurantio-fulva nulla." This cannot be the Bradypus ai of Wagler, 

 which he thus describes : — " Cinereo-fuscescens sive rufescens, notaeo 

 Iannis duabus longitudinalibus albido-maculosis notato ; fronte alba ; 

 vitta utrinque pone oculum oblique rctrorsum ducta obscure fusca, 



