334 GEOLOGICAL SURVEY OF THE TERRITORIES. 
Some males were attached to females much larger than themselves. I 
was told that the Artemia appears in the spring, from the middle of 
Apuil to May.1, and disappears during very cold weather in autumn. 
ARTEMIA GUILDINGII Thompson. 
Artemia Guildingiti Thompson. Species haec, reperta in India Occidentali, delineata 
est a Domino Thompson in ‘Zoological researches’ sed non descripta, necnon 
satis accurata delineata est. 
Ariemi Guildingi, Thompson Zool. Research, Fasc, 5, t. p. 11. 
Hab.—In insula “St. Vincents,” in India Occidentali; Rev. L. Guild- 
ing. 
“This species is figured by Mr. Thompson, but not sufficiently 
described to enable me to give a good diagnosis of it. It was found at St. 
Vincents, in the West Indies, by t the Rev. Lansdowne Guildin g, by whom 
its natural history was intended to have been more fully detailed. The 
body seems to be thick and the abdomen shorter than the body and 
stout; the caudal segment does not appear to be lobed nor setigerous. 
The cephalic segment is conical in shape, and the superior antenne, 
according to Mr. Thompson’s figure, consist each of four joints. The 
ovarian sac consists, according to the same authority, of two articula- 
tions.” (Baird’s Monograph of the Family Branchipodide. Annals and 
Mag. Nat. Hist. 2d ser. xiv, 1854, p. 226). 
Genus BRANCHINECTA veri 
Plates IX, X. 
Branchipus Milne-Edwards, ete. (in part). 
Branchinecta Verrill, Amer. Journ. Sci. 2d ser. xlvili, 250. Sept. 1869. 
Proc. Amer. Assoc. Ady. Se. July, 1870. 
Body rather long and slender, but stouter than in Artemia; head 
rather small, but larger than in Artemia; 2d antennz of male (claspers) 
with a knob on the basal joint as in Artemia; the claspers simple, quite 
persistent in form in the different species, not elbowed, 2-jointed, with 
joints cylindrical: Ist joint slightly bent; the 2d joint not bent on the 
first, round, and about one-half as thick as the basal joint. The 2d an- 
tenne of the female are rather long and slender. Labrum large and 
long, extended beyond the closed mandibles; the end is square, with a 
nipple-like projection in the middle. Eleven pairs of legs, which are 
shorter and broader than in Artemia. The gills are usually larger, the 
flabella moderately large, and quite regularly oval externally; the 1st 
endite and the three following are much as in Artemia, but the first 
is not so distinctly divided distally into a secondary lobe. The 5th 
is decidedly rectangular in outline, the distal edge being straight, some- 
times hollowed out, with rather shorter sete than in Artemia; the 6th 
endite in all the legs is much shorter than in Artemia, being short and 
broad and well rounded at the end, with rather short sete. 
The abdomen has nine segments, and is as long or a little longer 
than the head and thorax together; the cercopoda are much longer than 
in Artemia, and equal in length to the terminal segment, which is much 
shorter than in Artemia; compared with Branchipus and succeed- 
ing genera they are small, short, and conical. The penis is deeply 
_ divided into two long slender curved branches. The ovisac is cylin- 
drical and remarkably long and slender; in B. coloradensis nearly half 
as long as the abdomen, and deeply cleft at the end. 
