1921] Schmitt: The Marine Decapod Crustacea of California 219 
II. Anterolateral and posterolateral margins not meeting at a distinct angle; 
carapace widest at seventh or eighth tooth; twelve or thirteen teeth. 
Dark color on dactyls of chelipeds reaching more than half the length 
of the outer margins, movable finger almost entirely dark colored. Merus 
of outer maxillipeds with antero-external angle produced. 
oregonensis, p. 234. 
KEY TO THE CALIFORNIA SPECIMENS OF CANCER, 20 MM. AND LESS IN WIDTH 
I. Front markedly produced, formed of five subequal teeth, of which the median 
is the most advanced; anterolateral teeth never spiny-pointed; carapace 
never pubescent. Fingers of chelipeds with dark color. Color pattern of 
carapace extremely variable, from more or less uniform color to promi- 
nent longitudinal lines. 
productus, p. 220. 
II. Front not markedly produced, formed of five unequal teeth, the outer teeth 
larger and more widely separated from the three median teeth than these 
from each other. 
A. Carapace widest at ninth or tenth anterolateral tooth. 
1. Carapace widest at tenth anterolateral tooth, which is always the 
last; posterolateral margin unbroken, entire. Carpus of cheliped 
with a single spine above, at distal angle; hand light colored, 
fingers without dark color. 
magister, p. 229. 
2. Carapace widest at ninth anterolateral tooth. 
a. Tenth anterolateral tooth (counting that next to the eye as one) 
prominent. 
i. Tenth anterolateral tooth usually spiny-pointed, never broadly 
rounded; rarely an eleventh tooth. 
a. Carpus of cheliped with two prominent spines (not count- 
ing that at hinge), one above, at distal end, and the 
second below it, at inner angle. 
i. Tenth anterolateral tooth projecting laterally beyond 
carapace as seen from above; carapace compara- 
tively smooth, without pubescence. Hand of cheli- 
ped light colored; fingers without dark color. 
gracilis, p. 232. 
ii. Tenth anterolateral tooth projecting dorsally, not 
reaching beyond outline of carapace as seen from 
above; carapace hairy, markedly areolated, granu- 
lated, granules in seattered groups. Hand of cheli- 
ped light colored; fingers with blotch of dark color, 
extreme tips ight colored. 
gibbosulus, p. 226. 
b. Carpus of cheliped with a prominent spine above, at distal 
end; below this, at inner angle, an inconspicuous spine 
sometimes present. Carapace granulated, granules 
crowded. Hand of cheliped light colored, fingers with 
blotch of dark color, extreme tips light colored. 
antennarius, p. 224. 
