442 MR. W. A. FORBES ON THE [May 16, 
Fig. 13. Wixia abdominalis, sp. n. 
a, Spider in profile, enlarged ; 4, cephalothorax of ditto in profile ; 
¢, caput and eyes, from in front ; d, abdomen, from behind ; ¢, maxilla 
and labium ; f, natural length of abdomen to extremity of protuber- 
ance; g, natural length of Spider (from base of falces to just above 
the spinners). 
14. Mago intenta, sp. n. 
a, Spider enlarged; 4, ditto in profile; ¢, left palpus; d, ditto, from 
outer side; ¢, natural length of Spider. 
2. Note on an Abnormal Specimen of Pithecia satanas. 
By W. A. Forsus, B.A., Prosector to the Society. 
[Received April 18, 1882.] 
A young male specimen of Pithecia satanas, which was lately for- 
warded to the Society’s Gardens, and died shortly after its arrival, pre- 
sented an abnormal condition that is perhaps worth recording in 
the Society’s ‘ Proceedings.’ 
The peculiarity consists in the completely ‘‘ webbed”’ condition of 
the third and fourth digits of the manus on each side, these two 
fingers being completely connected together down to their tips by a 
fold of nude skin, and with their nails closely apposed, though not 
connected, along their contiguous margins. The other digits of the 
hands, as well as all of those of the feet, are quite normal, the 
webbing of them not extending beyond the middle of the first 
phalanx. 
The case is interesting, partly as affording an excellent instance of 
an abnormal condition affecting homologous parts of opposite sides 
in an exactly similar way, and partly as showing that the lower 
Primates are subject, occasionally, to a condition of things which, as 
is well known, also occurs not at all rarely in Man. 
3. On some Points in the Anatomy of the Todies (Todide), 
and on the Affinities of that Group. By W.A. Forzzs, 
B.A., Prosector to the Society. 
[Received May 15, 1882.] 
One of the few important forms of birds that the late Prof. 
Garrod had not an opportunity, at some time or other, of dissecting 
was the genus Todus, the sole representative of the family Todide. 
I was therefore much gratified at being able to examine, some months 
ago, a spirit-specimen of Todus viridis, which was placed at my dis- 
posal for dissection by Prof. Newton with his accustomed liberality ; 
but I hesitated to publish my notes without having further material 
to confirm my observations. An opportunity of doing this has 
lately been afforded to me by the kindness of Prof. Baird and the 
authorities of the Smithsonian Inst:tution in Washington, who for- 
