734 DR. J. E. GRAY ON NEW SPECIES OF HAPALE. [Dec. 12, 
of the lately received specimens in the Museum ; and this has induced 
me to re-examine several that have been in the collection for years. 
The species of Hapale may be separated into four groups :— 
I. Ears naked, external, exposed, with a band of elongated hairs 
across the inner surface of the conch, forming a tuft. Tail annu- 
lated. WHapale. 
Hapare avurita, Geoff. 
Blackish, minutely punctulated with yellow or red; sides of the 
head, limbs, and hinder part black-brown; face more or less white ; 
ear-tuft grey, varies; back blackish, without any indication of 
cross bands. 
Var. Back punctulated with red and with faint pale cross bands, 
especially on the loins. 
Hab. Brazil. 
A large and strong species, much larger than H. iacchus. Lesson 
united it to that species, and Isidore Geoffroy in his Catalogue places 
it with them, not having observed the peculiarity in the position of 
the tuft. 
I do not know H. humeralifer, Geoff. 
Il. The ears naked, with a tuft of elongated hairs on the front edge 
of the ear-opening. Hair of sides of head elongated. Tail 
annulated. Iacchus. 
HaPALeE IACCHUS. 
The back cross-banded ; face with a white spot ; the ear-tuft black, 
white, or grey. 
I am inclined, from the examination of a large series of specimens, 
to believe that this species varies in the colour of the ear-tuft and 
also in the extent of the white on the face. From these characters M. 
Geoffroy divides it into four species, viz. I. vulgaris, I. albicollis, 
I. penicillatus, I. leucocephalus ; but these appear to me to be only 
slight local or accidental varieties. They are all of the same size, 
and they gradually pass into each other. 
Ill. Lars small, with scattered short hairs, without any ear-tuft ; 
sunk in the long fur of the head. Tail annulated. Cebuella. 
HapaLte pyGm#a, Spix, Bras. t. 24. f. 2; Castelnau, ie 
Amér. Sud, t. 
IV. Ears naked, exposed, without any ear-pencil. Tail uniform 
black. Mico. 
HAPALE MELANURA, Geoff. 
Pale brown ; head, limbs, and front of body pale; front edge of 
thigh and band across loins white ; tail black. 
