PACKARD.] PHYLLOPODS OF NORTH AMERICA. ond 
Mr. Thompson, in his Zoological Researches, remarks: “I received 
this species of Apus together with the Artemia Guildingii from the West 
Indies, and having as yet no details must leave its history in the hands 
of its distinguished discoverer. Itis ofa light blackish color, the clypeus 
translucent, almost membranous, and shorter in proportion than in any 
of the known species, with the extreme branch of the anterior member 
extremely long.” Unfortunately we have no further history of this 
species from its discoverer, the Rev. Lansdowne Guilding, but the short 
square-shaped carapace and the extreme length of the external branch 
of the first pair of feet sufficiently distinguish it. 
We add the following description of an Asiatic species, briefly de- 
seribed by us in 1871. 
APUS HIMALAYANUS Packard. 
Plate XVI, figs. 5, 5a. 
Apus himalayanus Pack. Amer. Journ. Sc. 1871. 
Several females.—Carapace two-thirds as long as the body, with from 
14 to 16 teeth on each side of the sinus on the hind edge, the last tooth 
on the extreme end of the shield being more prominent than usual. 
Byes and post-ocular tubercle small, as in A. cancriformis ; mandibular 
muscular eminence behind also as in A. canecriformis ; frontal doublure, 
hypostoma, and appendages as in A. cancriformis. The Ist pair of feet 
closely resemble those of A. newberryi in the form of the long knife-like 
scale, as well as in the form of the gill and accessory gill (flabellum) ; 
the length of the 5th endite of the first pair of feet is 19"™™., and it is 
composed of from 72 to 80 subjoints, while A. cancriformis has about 50, and 
A. wqualis 42. Diameter of the ovisac is nearly 4™™ (.15 inch). There 
are the same number of spines on the abdominal segments as in A. can- 
criformis, and the spines on the telson have the same arrangement, 
there being on the upper side four spines at the insertion of the stylets, 
the 4th being minute; a single spine on the hind edge projecting over 
the sinus in the middle of the hind edge, which is deeper and narrower 
than in A. cancriformis; there is also a minute spine on each side of the 
sinus as in A. cancriformis, and two minute spines at the bottom of the 
sinus. Near the base of the telson, on each side, is an oval depression, 
with the posterior side raised and bearing three teeth, just as in A. can- 
criformis. The telson, however, is considerably longer than in A. can- 
criformis, being two-thirds as long as wide, while in the latter it is only 
one-half as long. On the under side of the telson the hind edge is 
rather more deeply incised than in A. cancriformis, and the edge is much 
more spiny, there being about 7 spines on each side. 
The cercopoda or caudal spines are finely spinulated, almost hairy, as 
in A. cancriformis, in this respect differing from all the American species. 
Total length of body, 25™". 
Greatest length of carapace, 16™. 
Of the keel, 117". 
Distance from anterior end of the keel to the front edge of the head, 
5g™". 
Length of abdomen beyond the hind edge of carapace, 9™”. 
Length of caudal appendages, 28". 
Number of segments beyond the hind edge of the carapace, 19 (in A. 
cancriformis, 14). 
Number of segments behind the last pair of limbs, 7 (in A. canert- 
formis, 6). 
