468 MR. P. L. SCLATER ON A COLLECTION [June 13, 
read before this Society on the 27th of January, 1863*. The spe- 
cies represented in the series are two Mammals, five Reptiles, and a 
Crayfish. 
The Mammals, which have been kindly determined for me by my 
friend Dr. W. Peters, are of the following species :— 
1. Nycrinomus (MorMopTeRvst) JUGULARIS, Peters, n. sp. 
N. supra fuscus, pilis basi albis, subtus fusco-canus, alis nigris ; 
capite depresso, rostro lato ; auriculis triangularibus, sejunctis ; 
fovea jugulart magna. 
The only specimen of this very interesting species is a male, dis- 
tinguished from all other species by a deep transverse fossa imme- 
diately before the manubrium sterni. 
The head appears more flattened than in any other species, and 
terminates with a broad flattened snout. The triangular large ears 
are, compared with those of other species, rather thin, not united, 
but separated by an interspace of 4 millim. 
The fur is soft, of moderate length. The hair of the upper parts 
is dark brown, at the base white; that of the underside greyish. 
The skull is more flattened than in other species, and remarkable 
for a strongly developed ante-orbital crista. 
millim. 
Total legsth ie. .9.. Sess Bes. coitus 0089 
Length of the head ...... Saroee Spite 0°021 
of the ear in front .... ..... 0°014 
‘Breadthrofithe ear lo26cs's ae sen fetus 0-012 
Length of humerus”... 0. oss secs 0°024 
OMOLeAriMn Ow cls. 2 Se Se ae 0°037 
— Of-thumb sa. 6 ose ts Cee a 0:0085 
of second finger ...........- 0°0335 
— of third finger .............. 0°067 
of fourth finger ...... é eee 0°0565 
of fifth finger +...5%. wane calm ae 
al Ghighise se louie tres ok en ie 
Of tibinien meee cars ae 0°0105 
of foot with claws .......... 0°008 
ot taille tere oes AG Ar as LS) 
of free end of the tail........ O O11 
2. Mus, sp.? 
A very young, indeterminable specimen, with only two molars de- 
* See P. Z. S. 1863, p. 48, 
3.1 1.1—)/1 1.8 
+ Mormopterus, nov. subg. In the formula of the teeth (>> > —- 7 3-3? 
Sy lel SIS \ ees ; ven fs 
when younger =~ > 3-7 =) it differs from Nyctinomus with — molars, and 
approaches more to Molossus. The lips also are not so much plicated as in Nye- 
tinomus. It is a species intermediate between Nyctinomus and Molossus, thus 
showing another instance of the relationship of the fauna of Madagascar to the 
American fauna. 
