220 University of California Publications in Zoology [Vol. 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 Bandall, Jour. Acad. Nat. Sci. Phila., 8, 116, 1839 ; 

 Dana, Crust. IT. S. Expl. Exped., 1, 156, 1852; pi. 7, fig. 3, 1855; Lock- 

 ington, Proe. Calif. Acad. Sci., 7, 94, 1877; Bathbun, B., The Fisheries 

 and Fishery Industries of the U. S., sec. 1, 771, pi. 262, 1884; Holmes, 

 Occas. Papers Calif. Acad. Sci., 7, 47, 1900; Bathbun, H. A. E., 10, 175, 

 1904; Weymouth, Stanford Univ. Publ., Univ. Ser., no. 4, 40, pi. 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 



