MAMMALIA. 
15 
ridge wliicli is not developed in the preniolar. By its appearance, the molars 
of Arctocebus acquire the pattern so obvious in Anthropoid Apes and in 
Man, but which is absent in all the Old World Apes and in most of those of 
the New World. 
The author then describes the abdominal viscera j he found the Stensonian 
ducts ; uvula and vermiform appendix of coecum are absent ; liver broken up 
into numerous lobules; kidney with but a single papilla; os penis well 
developed. The author leaves it undecided whether a pair of large sacs 
situated above the prostata and behind the neck of the bladder, and not 
communicating directly with the vasa deferentia, ought to be regarded as 
vesicula? seminales, or as a large uterus masculinus. 
A vote mirahile is present in the brachial as well as in the femoral artery ; 
although the author has omitted to look for another in the caudal artery, we 
may presume that it is absent, the tail being very short. These vascular 
plexus do not appear to differ essentially from the rete mirahile of Stenops 
tardigradus as described by Rapp ; and the statement of the author, that 
only a part of the ramuscules were injected, indicates that the rete mirahile 
of Arctocebus includes a venous system, as in Stenops. 
Finally, Prof. Huxley agrees with Dr. Gray that Arctocebus is generically 
distinct from Perodicticus (Benn.), but he distinguishes it by additional 
characters, viz. : Tail rudimentary. Pinna of the ear with two projecting 
shelf-like lamellae above the auditory meatus. The index finger rudimentary 
and nailless. Dental formula : i. c. ; premol. ^ ; mol. The an- 
terior upper molars have oblique ridges and are quadricuspid ; the last is 
tricuspid ; the last lower molar quinquecuspid. 
Lemur rufus. Prof. Ilyrtl describes the retia mirabilia, in Denkschr. 
Acad. Wiss. Wien 1864, xxii. p. 124. 
Stenops javanicus. Mr. Flower gives a very detailed description of the 
brain of this species, taken from a fresh example, and compares it, at the 
end of the memoir, with that of the higher Quadrumana and of some Carni- 
vores of a similar size. It departs considerably from the former by the 
shortness of the posterior lobes of the cerebrum, which do not completely 
cover the cerebellum, and by the large size of the olfactory lobes ; yet it 
retains the most distinctive characteri^ics of the Monkey-brain, viz. a 
complete Sylvian fissure, and a well-developed calcarine sulcus. On the other 
hand, a comparison of this brain with that of a Cat or of a Cercoleptes shows 
that it belongs to an entirely different type ; so that even the nomenclature of 
the superficial parts of the hemisphere of the one utterly fails us when we 
attempt to apply it to the other. Trans. Zool. Soc. v. 1864, p. l03 ; several 
views of the brain are given on pi. 27. 
4 OtoUcjius senegalensis. Prof. Hyrtl describes the arteries of the forearm, 
in Denkschr. Acad. Wiss, W’ien, 1864, xxii. p. 130. 
Otolicniis crassicaudatus. Dr. Gray describes a variety (Jdrkii) collected 
by Kirk at Quillimane ;'^Dr. Kirk adds some notes on its habits. Proc. Zool. 
Soc. 1864, p. 456, d On the same animal, see Kirk, ibid, p, 650. Dr. Sclater 
is inclined to consider Galago monteiri (Bartlett) as a pale variety of this 
species. Proc. Zool. Soc. 1864, p. 711. 
Galago garnettii. Dr. Sclater has figured this species from a living example. 
Proc. Zool. Soc. 1864, p. 711, pi. 40. 
