2 MESSRS. MURIE AND MIVART ON THE 
Burmeister's very complete monograph on Zursius'; Kingma’s? Graduation Thesis on 
Otolicnus (Galago) peli; Professors Owen? and Peters’s* excellent memoirs on Chei- 
romys, and Professor Huxley’s able paper on Arctocebus se 
Notwithstanding, a careful comparison and view of the general internal anatomy of 
the whole of the Lemuroidea is still a desideratum. But this, unfortunately, is as yet 
impossible, if only for the reason that information regarding the internal organs of the 
Indrisine®, Hapalemur, Lepilemur and others has been heretofore inaccessible to 
anatomists. 
Besides the rare Jndrisinw, even the more common genera Lemur and Galago have 
received less attention from comparative anatomists than might have been anticipated, 
considering the peculiar structure of the latter and the fact that the former is the 
typical genus of the whole suborder. 
Under these circumstances, and because specimens of both these genera have come 
into our possession, we think it advisable to attempt as general a review as the material 
at our disposal will permit. 
For this purpose we have taken the two last mentioned as our basis, and availed our- 
selves of the several memoirs above referred to for comparison. 
We have recently dissected eight species of those two genera, namely, Lemur catta, 
L. varius, L. niger, L. xanthomystax, L. nigrifrons, Galago crassicaudatus, G. garnetti, 
and G. allenii’. 
From this number we propose to select and describe the Ring-tailed Lemur, L. catta, 
in our text, as a type and standard of comparison for the entire suborder of Lemuroidea. 
We choose this genus not only because we have been able to give the details of five 
specimens of it, but also on account of its being, as before said, the type of the sub- 
order, because specimens of Lemur are pretty readily procurable, and, finally, on 
account of their large size enabling anatomical detail to be worked out with greater 
ease and more certainty. 
When we commenced this paper we intended to take L. catta as our type, both for 
description and figures; but finding that the muscles of that animal have been delineated 
by Cuvier and Laurillard in their magnificent ‘ Planches de Myologie,’ we have judged 
1 Beitrige zur niheren Kenntniss der Gattung Tarsius. Berlin, 1846. 
> Eenige Vergelijkend-Ontleedkundige Aanteekeningen over den Otolicnus peli. Eene Academische Proeve 
door P. Hoekema Kingma. Leyden, 1855. 
5 Trans. Zool. Soc. vol. y. p. 33. 
‘“ «Ueber die Siiugethiergattung Chiromys,” Abhandlungen der Kénigl. Akad. der Wissenschaften zu 
Berlin, 1865, 5 Proe, Zool. Soe, 1864, p. 314. 
° Since this paper was read, M. Alfred Grandidier has brought to Paris from Madagascar a new species of 
the Indrisine preserved in spirits of wine. M. Alphonse Milne-Edwards is, we are glad to say, about to 
describe fully the anatomy of this animal; and thus a most important gap in our knowledge of the Lemuroidea 
will be filled up. 
7 For the opportunity of examining this specimen we are indebted to the kindness of Mr. W. H. Flower, F.R.S. 
