5 
r 
be readily identified by the delicate marbling of the carapace and chelipeds, 
and the downward bend of the movable fingers. Abdomen of wale, five 
jointed. 
A single male specimen from San Diego. Length, 0.73; breadth, 0.88. 
Xanthodes Hemphillii. 
Front almost entire, slightly waved and somewhat produced; carapace, 
transverse, medial region prominently outlined; 1st antero-lateral tooth (D), 
almost obsolete; 2d, (E), long and low; 3d, (N), 4th, (T) and 5th, (S), 
pyramidal and pointed; cardiac region faintly outlined. Ist pair of feet, sub- 
equal, smooth; hands without crests or tubercles; fingers, black. The mov- 
able finger of the right hand with a large tubercle at base; 3d, 4th and 5th 
joints of four posterior pairs of feet compressed, fingers villous. 
A single male specimen found at Monterey. Length, 0.82; width, 1.10. 
Xanthodes leucomanus. 
This species appears to be very nearly allied to X. Hemphillii, having the 
front antero-lateral teeth, and areolation of that species. If there is any value 
in the subdivision Nanthodes, both should be included in it, as both have the 
first antennal joint connected with the front by a process. The principal 
difference between the two forms, size excepted, will be found in the net- 
work of raised lines upon the upper portions of the hand and carpus of the 
chelipeds in the present form; and the almost entire absence of the tomen- 
tosity upon the four hinder pair, which characterizes X. Hemphillii. The 
dactyli of the chelipeds are of a shining, leucous tint when recent. Several 
specimens, from Santa Rosa Island (W. G. W. Harford); Monterey (J. 
G. Cooper); and San Diego (Mr. Henry Hemphill). The carapax of the 
largest specimen measures half an inch in width, and 0.34 in length. 
Xanthodes ? novem-dentatus. 
Front rather narrow, prominent in centre, and produced forwards; teeth 
of antero-lateral margin, nine in number; carapace transverse; chelipeds 
long, the right considerably the larger; manus long and rather narrow, with 
a slight double crest on the superior margin; corpus with several blunt 
spines; posterior feet somewhat compressed, with a few scattered hairs on 
the margins. 
Asingle male specimen, from San Diego. Total length, 0.94; breadth, 1.25, 
Acanthus. Nov. gen. 
This genus is proposed for the reception of a singular species found at San 
Diego by Mr. Henry Hemphill. Its characters are: front, two-lobed, with a 
deep central emargination; antero-lateral margin, front, and whole circum- 
ference of orbit surrounded by long spines; carapax, narrow; antero-lateral 
and postero-lateral margins about equal in length; body, thick; abdomen of 
male, seven jointed. This genus appears to be near Pilumnus, but I can 
detect no trace of a praelabial ridge. 
