48 DR.K. CRISP ON THE OS PENIS OF THE CHIMPANZEE. [Jan. 10, 
tundatis, remige primo brevissimo, secundo abrupte longiore et 
nono equali, tertio quarto et quinto subequalibus longissimis 
externe emarginatis ; cauda rectricibus decem, elongata, gra- 
data ; acrotarsis longiusculis. Supra cinereo-olivacea, flexura 
flavescente, remigibus rectricibusque olivaceo-fuscis, illis externe 
griseo limbatis ; subtus pallide flavescens, annulo periophthal- 
mico paroticisque albis, pallide flavido tinctis ; maxilla perfusca 
favo limbata; mandibula flava ; pedibus schistaceo-brunneis. 
Long. tota 5°75, alee 2°8, caudee 2:6, acrotarsi *9, dig. med. cum 
ungue ‘58, hallucis cum ungue ‘51, rostri a fronte 54, eyusdem a 
rictu ‘7 poll. Angl. 
Hab. in insula Mascarena “ Rodriguez’’ dicta. 
Mus. A. et E. Newton. 
Oés. It is with considerable doubt that I refer this bird to the 
genus Drymeca. It seems to me to be quite as nearly allied to 
Prinia, with certain leanings towards Orthotomus. In my deter- 
mination of it, I am chiefly influenced by the opinion of Mr. G. R. 
Gray, who has most obligingly examined the specimen, and informed 
me that he considers it belongs to the first-named genus, adding 
that it ‘“‘is somewhat allied to D. thoracica, which is the type of 
Swainson’s subdivision Apalis.” I would take this opportunity of 
remarking that no other species of the genus Drymecca, as restricted, 
is found in any island of the Mascarene group ; for the Drymeca 
madagascariensis of Dr. Hartlaub (Orn. Beitr. zur Fauna Madagas- 
cars, p. 35) seems to me more properly to belong to the genus Cistz- 
cola, having twelve, instead of ten, rectrices. 
5. On THE Os Penis OF THE CHIMPANZEE (TROGLODYTES NIGER) 
AND OF THE ORANG (Stm1A saTyRuS). By Epwarps Crisp, 
M.D., F.Z.8., &c. 
The communication I am about to make will, I think, be received 
with some amount of gratification by the members present, as there 
are none of us, I presume, that wish to claim relationship with the 
ape, and any discovery that makes the line of demarcation between 
man and the brute more definite and positive will be hailed with 
satisfaction. All, as far as 1 know, who have dissected the two apes 
above named—animals among the anthropoid Quadrumana that have 
most frequently come under the knife of the anatomist—have either 
if qr" 
a. The penis-bone of a young Orang. 
b. The penis-bone of a young Chimpanzee*. 
denied the existence of a bone in the penis, or have inferred that it 
was not present. During my first examinations of the Orang and 
* These bones are represented with the periosteal covering. 
7 
