1921] Schmitt: The Marine Decapod Crustacea of California 251 
Kery TO THE CALIFORNIA SPECIES OF PINNOTHERES 
I. Palp of outer maxillipeds small, much less than half as large as merus. 
Carapace wider than long. Dactyls of ambulatory legs faleate, terminating 
in slender, curved, corneous tips; dactyls of second pair of ambulatory legs 
the longest. Male unknown. (Known only from the type locality, Pacific 
Grove. ) 
holmesi, p. 251. 
II. Palp of outer maxillipeds large, nearly half as large as merus. 
A. Carapace wider than long, though nearly square; with rounded corners; 
naked. Dactyls of ambulatory legs nearly straight, those of fourth 
pair of ambulatory legs longer and more slender than the others. 
Male unknown. (From Monterey and Santa Cruz, not found since 
these two records were made by Holmes. ) 
nudus, p. 252. 
B. Carapace as long as or longer than wide. Dactyls of ambulatory legs 
faleate, terminating in slender, curved, corneous tips; dactyls similar. 
concharum, p. 252. 
Pinnotheres holmesi Rathbun 
Plate 39, figures 7 and 8 
?Pinnotheres nudus Weymouth, Stanford Univ. Publ., Univ. Ser., no. 4, 53, 
fic. 1, 1910; not P. nudus Holmes, 1895. 
Pinnotheres holmesi Rathbun, Bull. U. 8. Nat. Mus., 97, 68, text fig. 31, 
plo; figs: 1-25, 1918: 
Original Description of Female—Carapace very soft and yielding, broader 
than long, the front and long antero-lateral margins forming a single arch; 
postero-lateral margins short, oblique, concave; posterior margin long, concave; 
greatest width in posterior half; carapace convex, thick, rounding gradually down- 
ward, except posteriorly; gastric region defined by a depression. ... Front between 
orbits truncate, medially faintly emarginate, orbits partly visible from above. 
Carpus of outer maxilliped suboblong; propodus no longer than carpus, and 
narrower, end obliquely rounded; dactylus linear, of nearly even width through- 
out, rounded at extremity, inserted near proximal end of propodus and not reach- 
ing its distal end. 
Chelipeds stouter than [ambulatory] legs, but not very large; lower margin of 
propodus nearly straight, palmar portion widening rapidly to a point behind 
base of, fingers; fingers stout, hooked at tips, prehensile edges uneven, an acute 
tooth near base of dactyl. 
Relative length of [ambulatory] legs represented by 2, 3, 1, 4, the second 
longest; 2, 8, and 4 very slender; dactyl 2 much longer than 3 or 4 and curved on 
both margins, dactyl 3 less curved on anterior and nearly straight on posterior 
margin, dactyl 4 a trifle longer than 3, margins nearly straight; horny tips of 
all four very slender and hooked. First leg stout, especially propodus, not reach- 
ing middle of propodus of second; propodus widest distal to the middle and 
narrowest at distal extremity; dactyl shortest of all, conical except for tip. 
Abdomen voluminous, much longer and wider than carapace (Rathbun). 
Dimensions.—Type, female: length of carapace 7.2 mm.; width 8.7 mm. 
Type Locality—Probably Pacific Grove; known only from a single ovigerous 
female specimen. 
