228 Zoological Society. 



This is evidently the species described and figured by Clusius 

 (Exot. Ill), for he observes, " Collum non adeo crassum ut pictura 

 refert, quia oblongioribus densisque pilis, quemadmodum et totum 

 corpus, tectum erat : pilorum color ex fusco quodammodo spadiceus, 

 sive potius qualis fere in crassiore ilia lanugine magnas et crassas 

 Indicas nuces tegente conspicetur ;" and better described and figured 

 at p. 373 as follows : " Universum corpus a summo capite ad ungues 

 usque, densissimis Usque prolixis villis erat obsitum, coloris partim 

 nigri, partim cineracei, pcene ut meles, quern vulgus tassum sive taxum 

 appellat, mollioribus tamen, atque a collo secundum dorsi longitudi- 

 nem, usque ad posterior a fere crura, nig rorum pilorum quadam serie 

 erat insignitum: totum collum a cervice ad anteriora usque crura 

 velutijuba quadam nigrorum crinium in utrumque latus propenden- 

 Hum tectum habebat." 



Marcgrave gives a copy of the second figure in Clusius (at p. 221), 

 but with a rather different description, viz. " Totum corpus prolixis 

 et duo digitos psene longis pilis est vestitum cinerei coloris. Tarsi 

 similis sed mollioribus et cum abbedine nucis in dorso pilis magis 

 albescunt et per medium dorsi tendit linea fusca a capite, per colli 

 longitudinem pilis jubse modo ad latera explicantur paulo longiores 

 quam in reliquo corpore." (p. 221.) 



The forehead (of the skull) flat over the orbit, rather concave be- 

 tween the front of the temple, wide and rather depressed over the 

 occiput. The pterygoid bones much-swollen, very thin, paper-like. 

 The lower jaw with a broad square truncated process in front between 

 the teeth, the sides converging, with the outer edge reflexed ; the angle 

 broad, acute, slightly produced beyond the back edge of the condyles. 

 Teeth large, broad, the lower front one oblong, transverse : the lower 

 process of the zygoma broad, flat, dilated. 



The skull is easily known from the next by being much wider in 

 all its parts compared with its length ; this is especially visible at the 

 occipital ridge and the palate, and on the under side of the lower jaw. 



The Sloth figured by Edwards (Gleanings, t. 310) is from a badly- 

 preserved specimen in the collection of Lord Peters, brought from 

 Honduras. It appears to belong to this species, being the only one 

 having long hair on the neck, but the black colour of this crest is not 

 mentioned in the description. 



Bradypus tridactylus, Linnaeus, was first described by that author 

 in the Amcenitates Acad. i. 487, but the description is so slight that it 

 is not possible to determine with certainty the specimen for which it 

 is intended, the only specific character being the following : " facie vero 

 pilis fiavis vestitum ; gulafava, totum corpus ursorum instar, pilis 

 longis et asperioribus vestitur colore ex fusco sive griseo et albo vari- 

 ante.*' In the Mus. Adolph. Fred. p. 4, Linnaeus refers to this de- 

 scription. The mixed colours of the first description and the habitat 

 Surinam best agree with this species. 



Gmelin merely described this species as " Corpus pilosissimum gri- 

 seum, fades nuda, gulaflava." 



Browne (Jamaica) mentions it as an animal which is sometimes 

 brought from the mainland to Jamaica (not as a native of the 

 island) ; his name at once shows that it must belong to this species. 



