252 A. E. Verrill on new American Phyllopod Crustacea. 
rather slender, curved outward and forward at base, having 
just beyond the tooth on the inside a distinct but very obtuse 
rounded angle, from which the outline slightly. curves inward 
to near the tip, which is a little dilated and recurved. 
basal portion, including the tooth, is retracted into the first 
joint in some specimens. On the front of the head between 
slender, tapering, reaching a little beyond the eyes. Caudal 
appendages long, rather narrow, slightly swollen at base, grad- 
ually tapering to the acute tips, and bearing along the sides, 
except at base, very numerous, long plumose seta. Hgg- 
pouches short, broad-oval, nearly as wide as long, slightly 
three-lobed posteriorly, the central lobe largest, sides extended 
and largely adherent to the sides of the abdomen, length 4"", 
width 3°5. Body flesh color or pale red, the intestine darker 
red or greenish, 
A large male gives the following measurements : length of 
first joint of claspers 4-62™"; diameter 2°40; length of second 
joint 4°14 ; breadth at base 1:90 ; at tooth °72 ; in middle ‘52 ; 
length of tooth -90; its diameter -33 ; length of caudal ap- 
pendages 4; breadth at base ‘33; in middle -20; length of 
sete 2; length of antenne 3. , 
New Haven, in stagnant pools,—J. D. Dana, D. C. Eaton, 
A. E. Verrill ; Salem, Mass., April 19, 1859, R. H. Wheatland, 
Ss geoke (from Essex Institute) ; Cambridge, Mass., A. 
errill, 
their appendages. B. stagnalis has a pair of long setiform 
organs between the claspers, and a tooth on the 0 
of Chirocephalus diaphanus, copied apparently from Des 
marets, pl. 56, which is itself a copy. 
* Invertebrata of Massachusetts, p. 39. 
ag Xavi! History of New York, Zodlogy, Part 1, Crustacea, p. 6% ae 
