1921] Schmitt: The Marine Decapod Crustacea of California 151 
Oedignathus inermis (Stimpson) 
Plate 19, figure 1 
Hapalogaster inermis Stimpson, Ann. Lye. Nat. Hist. N. Y., 7, 243, 1860 
(1862). 
Hapalogaster brandti Schalfeew, Mélang. Biol., 13, 330, figs. 1, 5b, Bull. 
Acad. Imp. Sci. St. Petersb., 35, 336, 1892. 
Oedignathus inermis Holmes, Oceas. Papers Calif. Acad. Sci., 7, 119, 1900. 
Oedignathus brandti Holmes, ibid., 7, 118, pl. 1, figs. 17-20, 1900. 
Oedignathus inermis Rathbun, H. A. E., 10, 163, 1904. 
Dermaturus inermis Balss, Abh. der k. Bayer. Akad. Wiss., II, Math.-phys. 
Klasse, Suppl., 9 Abh., p. 71, 1913. 
Fig. 97. Oedignathus inermis, outline of carapace (after Holmes). 
Characters.—Carapace more or less completely covered with flat scale-like plates 
or minute squamae, which are setose along the anterior margin. Chelipeds very 
unequal and covered with low, granulated, wart-like tubercles; hand of larger 
cheliped large and swollen, fingers somewhat gaping at the base, the tips excavated 
within. Calcareous plates on the two terminal abdominal segments inconspicuous ; 
the margin of the left side of the abdomen in the female only is somewhat hard- 
ened and segmentally incised. 
Dimensions—Type: length of carapace 10 mm., width posteriorly 9.7 mm. 
Of a specimen examined by Holmes, length of carapace from tip of the rostrum 
to posterior emargination 15.5 mm., width 15.5 mm., length of large cheliped 
40 mm., length of small cheliped 28 mm. 
Type Locality—Puget Sound. 
Distribution—Unalaska to Pacific Grove, California (Rathbun). Japan 
(Balss). 
Remarks.—Miss Rathbun has very little doubt concerning the identity of 
Schalfeew’s species with that of Stimpson. She remarks that Stimpson’s type 
was smaller than any examples in the National Museum. 
Biological Survey of San Francisco Bay.—There are two specimens 
of Oedignathus inermis in the survey collection: a very small one 
with a carapace about 3 mm. long, taken from between the tide levels 
at Point Bonita, and a larger one with a carapace 25 mm. in length, 
which unfortunately bears no label but which was probably obtained 
at or near the same locality. 
