468 Dr. J. E. Gray on the Antilocapride. 
each side of the medial line there is a red band having a bright 
golden lustre; in the space between these bands another band 
extends, that projects from each side three short streaks directed 
obliquely backwards, and has a small spot on each side, near its 
posterior extremity; the band, streaks, and spots, with the two 
anterior protuberances, have a black hue; the under part has a 
silvery lustre, with a slight golden tinge, and is bounded on 
each side by two longitudinal dark-brown bands, comprising 
between them another of a dull-red hue: the sexual organs 
form a transverse oval; a small process is ccnnected with their 
posterior margin, and their colour is pale reddish-brown; the 
branchial opercula have a yellow hue, and that of the spmners 
is brown. 
The collection contained an adult female of this brilliant 
Tetragnatha. 
Tribe Senoculina. 
Family Scyropipz. 
Genus Scyropzs, Latr. 
Scytodes thoracica. 
Scytodes thoracica, Walck. Hist. Nat. des Insect. Apt. tom. i. p. 270; 
Latr. Gen. Crust. et Insect. tom. i. p. 99; Blackw. Spiders of Great 
Britain and Ireland, part 2. p. 380, pl. 29. fig. 272. 
—— tigrina, Koch, Die Arachn. Band y. p. 87, tab. 167. fig. 398. 
One adult female of this species was included in the collection. 
LVIII.— Additional Note on the Antilocapride. 
By Dr. J. EH. Gray, F.B.S. &c. 
ArrER my notes on this family were written and the manuscript 
sent to the printer, I heard that Dr. Sclater had made some 
observations on the genus at the British-Association Meeting at 
Nottingham. The paper is published in the last Number of 
the Annals. I am very glad to find that Dr. Sclater agrees 
with me in the necessity of forming the genus into a peculiar 
family. 
Dr. Sclater has adopted Dr. Sundevall’s division of the Rumi- 
nants into two groups, according to the form of the foot; but 
I think his change of Sundevall’s term Digitigrada into Pha- 
langigrada is to be regretted, as adding a useless synonym. 
There is no doubt that the form of the placenta is an interest- 
ing physiological fact ; but I doubt its applicability to zoological 
classification. It is only to be observed at one period of the 
animal’s life, and is only known in a very few species: for ex- 
ample, I am not aware that it is known in Antilocapra, the 
