21 
Macrotus. 
Ears large, lateral, slightly plaited, united over the head by a rather 
high transverse membrane. ‘Tragus elongate, acute ; lobule broad 
and divided from the conch by a slight nick. Nose-leaf lanceolate, 
erect; the front margin distinct. Lower lip with a narrow, tri- 
angular, smooth-edged wart, grooved in front. Wings broad; 
thumb rather elongated; the first joint webbed. Interfemoral 
membrane large, truncated; the heel-bones long ; feet free to the 
ankles; largest toes subequal. Tail elongate, tapering, enclosed 
in the membrane with the exception of the last joint, which is 
produced beyond the edge. 
Macrotus Warernovusi1. Macr. colore murino, abdomine palli- 
diore ; prosthemate lanceolato. 
unc. lin. 
Longitudo ab apice rostri ad caude basin .. 2 6 
CHULA) 5 Sais alae Ale Ste Be I 42 
—— QUMS/S%) . HHA svieuite mio ese WAND: Ly, 4B 
—. palliaiavis)...wassrenenss amnivinsels, on Onn Gy 
oo PrOSthEMAS ews vag = a ive tele 0 5 
Gnhibrachitt.. 125 OS oss RRA D2 
a FTDI OL oc Baie ss SoeWeiae se es wel ele ws 011 
qulontisss. se Phere Nak So POLS 0 6 
Hab. Hayti. 
The interfemoral membrane, in this Bat, has a muscular band on 
each side, situated about one-third of the distance between the base 
of the tail and the heel-bone. The ears are rounded at the apex, 
and slightly hairy. The tragus is of an ovate-lanceolate form, has 
an acute tip, and a very indistinct notch near the base on the outer 
side. 
Mr. Gray has since received specimens of this species from Jamaica, 
where it was discovered by Dr. Parnell ; this and the two following 
species are indicated under the name here used in the recently pub- 
lished list of the Mammalia in the British Museum. 
Mr. Gray next proceeds to make some observations upon a species 
of Porcupine in the collection of the British Museum. This animal 
is the Hystrix subspinosus of Lichtenstein, and has been described 
under that name by Kuhl. It however presents various important 
modifications in the structure of the skull and teeth, upon which 
Mr. Gray thinks it desirable to establish a new genus under the 
name of 
CHATOMYS. 
The body and limbs are covered with subequal, short, and rather 
flexible spines. ‘The tail is of an elongate conical form, and provided 
with rings of square scales and scattered bristles. 
The skull is short, and has broad, convex, swollen zygomatic 
arches, and the palate is contracted. The cutting teeth are rounded 
é - 4 7 
in front ; the grinders are -—7; each grinder of the upper jaw has 
