286 COLE 
show up very plainly as dark brown lines. Wilson says of “Ph. maxillare” 
that the color is “‘ blackish or sepia to nearly pure white.” 
In the armature of the tarsal joints I find some variation from the 
description and figures of Sars. On the first I do not find one spine 
noticeably longer than the others, but a regular gradation up to the long- 
est. In the majority of cases the second agrees with the description, but 
in various specimens the number of spines on the heel varies from 5 to 
7, and the distal two are not always opposed to one another. The num- 
ber and arrangement may vary on the different legs of the same specimen. 
Genus Halosoma! gen. nov. 
Trunk rather stout; lateral processes broad, first 3 pairs closely 
crowded; fourth pair separated from third by a space. Neck short but 
projecting somewhat beyond base of proboscis, which issues ventro-an- 
teriorly from the first segment. Chelifori strong, chelate. Ovigera ? 
Legs rather stout; second tarsal joint with expanded heel and a thin, 
chitinous, knife-like ridge along the sole. Claw well developed; auxil- 
iary claws minute. 
Remarks.—It was only after considerable hesitation that the present 
genus was instituted, as it is based upon a single specimen, and that evi- 
dently a female, though no ova could be made out in the ovaries. It 
seems, however, especially in the greater concentration, producing a 
stouter trunk and closely approximated lateral processes, to be generically 
distinct from both Phoxichilidium and Anoplodactylus; in the moderate 
development of the ‘neck,’ on the other hand, it is intermediate between 
those genera. It is ‘unfortunate that the specimen does not possess 
ovigera, as the structure of those organs would help much in showing 
the position of this genus and its relation to the other genera. Should 
it prove to be an immature specimen which has not yet developed the 
ovigera, it is possible that it may be found to be related to the Pallenidz 
rather than to the Phoxichilidiidz. In either case the only thing to be 
done with it now seemed to be to describe it as a separate genus under 
the Phoxichilidiide, treating it as an adult female, until its true position 
can be determined by future collections. 
HALOSOMA VIRIDINTESTINALIS sp. nov. 
Plate xiv, fig. 11; plate xx1v, figs. 6-8; plate xxv, figs. 1-4. 
Type.—University of California, No. 19,513, Dillon’s Beach, Sonoma 
County, California. 
Trunk stout, compressed; sutures deep and well marked; first segment 
1From dws, disc, and odua, body. 
