220 University of California Publications in Zoology (Vou. 23 
ii. Tenth anterolateral tooth broadly rounded, never spiniform, 
an eleventh tooth invariably present; carapace promi- 
nently areolated, tending to become tuberculated, not 
hairy; teeth blunt, lamellate. Palm of cheliped with double 
row of tubercles on upper edge, and fingers almost wholly 
dark colored, much as in C. oregonensis. (Not known 
north of San Diego.) amphioetus, p. 223. 
b. Tenth anterolateral tooth absent or represented by a rudiment. 
i. Carapace finely pubescent; anterolateral teeth alternately 
large and small, more or less narrowly triangular, spiny- 
pointed. Carpus of cheliped with two spines, one above 
at distal end, and a second less conspicuous spine below 
this, at inner angle; hand dark colored, fingers darker than 
palm, extreme tips light colored. (Not known north of 
Half Moon Bay.) ; : 
jordani, p. 228. 
ii. Carapace smooth or sparsely and coarsely pubescent; antero- 
lateral teeth alternately large and small only in very 
young specimens (5 mm. or less); teeth broadly triangular 
becoming quite blunt anteriorly. Carpus of cheliped with 
a spine above at distal end and only in very young’a second 
minute spine below this. at inner angle. (Not known north 
of Long Beach.) : 
anthonyi, p. 227. 
B. Carapace widest at seventh or eighth anterolateral tooth; anterolateral 
and posterolateral margins not meeting at a distinct angle; marginal 
teeth tending to become blunt, lamellate with age. Carapace well 
areolated and more or less tuberculated, usually strongly so. In 
larger specimens the carpus is armed much as in C. antennarius 
above; in smaller specimens tubercles supplant the spines; upper edge 
of palm with a double row of blunt tubercles, fingers almost wholly 
dark colored. : 
oregonensis, p. 234. 
Cancer productus Randall 
Cancer productus Randall, Jour. Acad. Nat. Sci. Phila., 8, 116, 1839; 
Dana, Crust. U. 8. Expl. Exped., 1, 156, 1852; pl. 7, fig. 3, 1855; Lock- 
ington, Proc. Calif. Acad. Sci., 7, 94, 1877; Rathbun, R., The Fisheries 
and Fishery Industries of the U. S., see. 1, 771, pl. 262, 1884; Holmes, 
Occas. Papers Calif. Acad. Sci., 7, 47, 1900; Rathbun, H. A. E., 10, 175, 
1904; Weymouth, Stanford Univ. Publ., Univ. Ser., no. 4, 40, pl. 8, 
figs. 20-24, 1910. 
Characters.—Front markedly produced beyond outer orbital angles, forming 
five subequal, generally obtuse teeth which lie in the same horizontal plane, outer- 
most pair not more widely separated from inner pair than these are from median 
tooth; fronto-orbital width about one-fifth width of carapace. External orbital 
tooth small, next behind it rounded, succeeding teeth becoming larger and more 
acute posteriorly, the last tooth in adult specimens being the largest; between 
the teeth margin of carapace is marked with short, closed fissures. Carpus of 
chelipeds with a large tooth at the antero-internal angle and a smaller one behind 
