1921] Schmitt: The Marine Decapod Crustacea of California 223 
In the lower bay: six medium sized individuals were obtained in 
mid-channel off Mission Rock (D 5723) on a bottom of ‘‘black sticky 
mud streaked with brown,’’ covered ‘‘with many shells, clinkers, and 
abundant ophiurians.’’ Another specimen was taken at an adjacent 
station (D 5802) on a ‘‘sandy, shelly, mud’’ bottom; while still an- 
other was dredged on the edge of the ‘‘muddy sand’’ flats off Alameda 
(D 5767). 
The highest temperature at which any particular specimen was 
taken, was 17.0° C, off Alameda (D 5767), the lowest, 11.0° C, east of 
Fort Point (D 5779); the greatest salinity was 33.3, off Sausalito 
(D 5801), the least 21.7, off Point San Quentin (D 5708). 
One half of all the dredging records were in less than 9 fathoms; 
of the remainder only two exceeded 19 fathoms, the deeper of which 
was made in Golden Gate (D 5808) in 27 to 43 fathoms, at a time 
when the observed bottom temperature and salinity were 11.1° to 
13.4° C and 32.3 to 32.4 respectively. Two specimens were seined at 
Sausalito in March, 1912. 
A complete list of dredging stations at which this species was taken 
includes: D 5700, 5702, 5708, 5718, 5723, 5754, 5768, 5767, 5773, 5778, 
5779, 5795, 5801, 5802, 5808, 5826. 
Cancer amphioetus Rathbun 
Plate 36, figures 1 and 2 
Trichocarcinus dentatus Miers, Proc. Zool. Soe. London, 7, 34, 1879. 
Cancer amphioetus Rathbun, Proc. U. S. Nat. Mus., 21, 582, 1898; H. A. 
E., 10, 175, pl. 6, fig. 3, 1904. 
Characters.—Carapace smooth, not pubescent, but strongly areolated; antero- 
lateral margins with nine flat, broadly triangular, not strongly produced, subequal 
teeth; behind the ninth tooth is usually a small tooth on the posterolateral margin, 
which is defined by a line of granules; fronto-orbital width nearly one-half the 
width of the carapace; front five-toothed, the middle one very small, the two 
outer separated from the rest by a wide interval. Carpus with two spines, one 
above, at distal end, and a second below this, on inner angle; hand of cheliped with 
usually two spines on its upper margin and three longitudinal raised ridges on 
its outer surface; dark color on the fingers of the chelipeds reaching more than 
one-half the length of the outer margin, movable finger not more than two-thirds 
colored. 
Dimensions.—Type, male: length 22.2 mm., width 25.4 mm.; female: length 
27.5 mm., width 38.1 mm. 
Type Locality.—Off the Korean coast. 
Distribution—From San Diego Bay, California, to the Gulf of California; 
Japan; Korea, 11144 and 169 fathoms (Rathbun). 
