No. 403.] MORTH-AMERICAN INVERTEBRATES. 59I 
THE SPECIES OF PALICIDA. 
Genus Palicus Philippi. 
Key to Species. 
A. Crests on the second and third abdominal segments, and on the fifth 
sternal segment, not forming conspicuous laminiform expansions 
visible in a dorsal view. 
B. Anterior margin of meri of second and third ambulatory legs 
terminating in a nearly rectangular non-projecting tooth 
P. alternatus Rathbun, M(CH)G 
Æ. Anterior margin of meri of second and third ambulatory legs 
terminating in a spiniform, projecting tooth. 
C. Branchial regions much swollen 
P. obesus (A. Milne Edwards), G 
C. Branchial regions not swollen — P. faxoni Rathbun, M(CH) 
A’. Crests on the second and third abdominal segments, and on the fifth 
sternal segment be sie x ces laminiform expansions visible 
in a dorsal view. . i ica (A. Milne Edwards), G 
BIBLIOGRAPHY. 
The following citations are additional to those given in Synopses Nos. 
VH and X. 
'37 isis Epwarps, H. Histoire naturelle des crustacés. Vol. ii, 
pP. 1—95, and atlas. 
'52 e MW aee D. Crustacea of the United States Exploring Expedi- 
tion. Vol. i, pp. 306—389, and atlas. 
770 SMITH, SIDNEY I. Notes on American Crustacea. No. I. Ocypo- 
doidea. Trans. Conn. Acad. Sci. Vol. ii, pp. 113-176, Pls. II-V. 
77 Lockineton, W. N. Description of a New Genus and Species of 
Decapod Crustacean. Proc. Cal. Acad. Sci. Vol. vii, pp. 55-57. 
May 1, 1876. 
77 LockiNGTON, W. N. Remarks on the Crustacea of the West Coast 
of North America, with a Catalogue of the Species in the Museum 
of the California Academy of Sciences. Proc. Cal. Acad. Sct. Vol. 
vii, pp. 145-156. Dec. 1, 1876 
':80 SMITH, S. I. On the species of Pinnixa inhabiting the New England 
Coast, with remarks on their early stages. Trans. Conn. Acad. Sct. 
Vol. iv, pp. 248-253. 
! The species figured, though not entered in the list, is inserted to illustrate 
the genus. 
