280 MR. R. ASSHETON ON THE F@TUS AND [June 6, 
yellow, there is no difference in these examples and those from 
Natal. 
ENDOMYCHIDA. 
CEDIARTHRUS Gerst. 
“Hdiarthrus Gerst. Mon. Endom. p. 344. 
CHDIARTHRUS ALGOENSIS, Sp. i. 
CH. natalensi similis et affinis. Lerrugineus, antennis, palpis 
pedibusque nigris, tibtis rectis. Long. 4:5 millim. 6. 
Mas, antennarum articulo nono ampliato. 
Hab. Algoa Bay (Brawns). 1 example. 
Rather ise ger than @. natalensis, and diftering from it in having 
the antennze “wholly black, with all the joints rather longer and 
more stoutly built; the ninth joint is triangularly enlarged, as in 
other species of this genus, in the males; the two terminal joints 
are formed quite as in @. natalensis, but are larger. 
The legs are black and have their tibie straight, which alone is 
sufficient to distinguish this species from (@. natalensis. For 
some general remarks on the genus I must refer to Ann. & Mag. 
N. H. ser. 7, vii. p. 402 (1901). 
LycoPERDINA SERICEA Gerst. Mon. Endom. p. 218 ¢ 
Hab. Algoa Bay, Cape Colony (Lrauns). 
There is a single specimen of a very small Lycoperdina in 
Dr. Brauns’ collection which JT refer to this species with some 
little doubt. 
8. On the Foetus and Placenta of the Spiny Mouse (Acomys 
cahirinus). By RicHarp AssHeTon, M.A., F.ZS., 
Lecturer in Biology in the Medical Sahel a Gun 
Hospital, University of London. 
[Received May 28, 1905. ] 
(Text-figures 41-45.) 
I received from Mr. F. E. Beddard, F.R.S., Prosector to the 
Zoological Gardens, London, a bottle containing the foetus and 
uterus from an individual of the Spiny Mouse (Acomys cahirinus). 
The exact age of the feetus was not known, but the figure (text- 
fig. 41) given here shows that it was well advanced. 
In the bottle were three objects—namely, the fetus and 
placenta (as shown in text-fig. 41), the uterus with Fallopian 
tubes and ovaries, and a third object which was a_ partially 
absorbed feetus and placenta. 
The uterus is bicornuate; each horn measures about 18-20 mm., 
and passes gradually into the Fallopian tube, a short, coiled tube 
lying alongside the ovary (4 mm. x 2 mm.). 
