254 University of California Publications in Zoology [Vou. 28 
Characters.—Carapace smooth, glossy, membranaceous, subquadrate in out- 
line, with the angles broadly rounded; the space between the longitudinal sulci 
is longer than wide and slightly narrowed behind; anterolateral margin rounded 
and marked by round cluster of pits; front abruptly turned down, with a shallow 
transverse sulcus covered with pubescence. Antennules obliquely plicated in very 
wide fossettes. Last joint of outer maxilliped reaches the end of the preceding 
joint. Palm of chela widens a little distally and is furnished with two rows of 
hair below, the inner one of which is continued to the end of the immovable 
finger. 
Dimensions.—Type, female: length of carapace 12.2 mm., width 14.3 mm. 
Type Locality—Puget Sound. 
Distribution —Alaska to Laguna Beach, California (Rathbun). 
Remarks——Commensal in bivalve mollusks: Mya and Mytilus (Rathbun). 
Fabia lowei Rathbun 
Plate 39, figures 3 and 4 
Fabia subquadrata Holmes, Occas. Papers Calif. Acad. Sci., 7, 87, 1900 
(part). 
Raphonotus lowei Rathbun, H. A. E., 10, 186, text fig. 93, 1904. 
Fabia lowei Rathbun, Bull. U. S. Nat. Mus., 97, 104, text fig. 55, pl. 24, 
figs. 2, 4, 1918. 
Ds 
Fig. 151. Fabia lowei, chela, 9 X 4 (after Rathbun). 
Characters.—Very similar to F. subquadrata, with carapace a little wider; 
turned-down front naked, with no trace of a transverse groove. Last joint of 
outer maxilliped does not reach the end of the preceding joint. Palm of chela, 
not widening distally, its margins subparallel or a little convex; lower surface 
with but one line of hair, which is continued to the end of the immovable finger ; 
fingers less arched and less gaping than in F. subquadrata. 
Dimensions.—Type, female: length of carapace 10 mm., width 12.5 mm. 
Color.—In life whitish in color; carapace and abdomen largely orange color 
(Holmes, as F. subquadrata). 
Type LocalitySan Pedro Bay, California. 
Distribution—Santa Monica Bay to San Diego, California (Rathbun). 
Remarks.—Commensal in bivalve mollusks: Pholas, Pachydesma, Modiola and 
Paphia (Rathbun). 
Fabia canfieldi Rathbun 
Plate 39, figures 5 and 6 
Raphonotus subquadratus Rathbun, H. A. E., 10, 186, 1904 (part: specimen 
from Monterey). 
Fabia canfieldi Rathbun, Bull. U. S. Nat. Mus., 97, 106, text fig. 57, pl. 24, 
figs. 5 and 7, 1918. 
Original Description of Female—Carapace of unique specimen very soft and 
so crushed as to be for the most part beyond description. Front devoid of hair 
and with a short, longitudinal median depression. 
