PACKARD.] PHYLLOPODS OF NORTIT AMERICA. 349 
organs are very feebly armed with a few short spines and are nearly 
straight. The cephalic horns of the female are twisted upon themselves, 
slightly bent and flattened at their extremities, which are fringed with 
short hairs. The large lateral, ovoid, pedunculate, apparently gland- 
ular organs behind the eyes are the same in size and shape in both sexes. 
The ovigerous sacs are large, nearly half as long as the abdomen, con- 
ical in form, and contain a great number of ochraceous eggs, more nu- 
merous and much smaller than those of Chirocephalus holmanii from the 
same locality. The male is of a beautiful green, deeper about the head, 
as though saturated with acetate of copper; the female, on the other 
hand, is yellow, with a tinge of green, verging to brownish in parts, and 
is very nearly of the same size as the male, if not a little larger. This 
similarity in the size of the sexes, with a tendency in the females to be 
largest, is observed only in S. torvicornis, as far as I am aware. The 
two rather long, plumose, tapering branches of the tail are red in both 
sexes, but of a much brighter red in the female; more slender in the 
male. Length, 27™™” (Ryder). 
The main difference between S. sealit and texanus is that in the former 
the claspers are considerably shorter, the 2d joint being much shorter 
and the 3d joint at base much broader, while the 2d spine on the shorter 
fork is nearly three times as large as in S. texanus, and the longer fork 
is much slenderer. There are no differences in the feet, as I find after 
careful microscopic examination. C. seal also appears to be rather 
larger. 
Regarding the mode of occurrence of this species we quote from a 
letter of Mr. W. P. Seals, dated Woodbury, N. J., November 7, 1879: 
“T have delayed answering your letter until I could assure myself 
positively as to the present existence of Streptocephalus sealit. Unfor- 
tunately I did not save any specimens, and the swales in which I found 
them are now dry with one exception, and in that I cannot find a single 
specimen. Perhaps the following notes which I have made will interest 
you. I find them in two places separated by about amile. One of these 
is never dry. In this one they disappeared about the beginning of 
June, and have not yet reappeared. In the other swale they disappeared 
about June 6th by reason of its drying up. In about two weeks after 
the heavy rains in the latter part of August they had again made their 
appearance. By October 20th they had again disappeared by reason of 
the drying up of the swale. Chirocephalus holmanii also exists in this 
swale, but has not made its appearance since disappearing last June.” 
We have also received numerous specimens from Dr. C. IF. Gissler, 
who sends us the following notes: 
‘*T send you now a bottle with Chirocephalus of both sexes. A few 
specimens of Hubranchipus vernalis might have slipped in also, as they 
occur together in a very large and deep pond (no fishes seen so far) near 
Glendale, L. I. With one Eubranchipus about twenty Chirocephalus 
holmani occur. The males are in average about 14™" shorter than the 
females. Color yellowish or reddish or greenish, last 3 abdominal seg- 
ments with red pigment, the latter confluent, not granular. The 9 has 
the same second inner lobe as Ryder figures it. Ovary (observed in 
many 2) extends upward to the 4th pair of branchipods from the end; 
no anastomosis in the post-abdomen. The water of the pond is perfectly 
clear, colorless, numberous Entomostraca occurring in it. I have seen 
them in copulation many a time, and can assure you that the tentacles 
do not come into use as an auxilliary.” 
On March 23, 1831, Dr. Gissler visit d the same pond at Glendale 
and found C. holmani in great abundance, getting two or three dozen 
at every dip of the net. 
