1921] Schmitt: The Marine Decapod Crustacea of California 59 
Dimensions.—Type, female: length 54 mm.; of carapace and rostrum 20 mm.; 
of rostrum 11.5 mm. , 
Type Locality.—North of Bird Island, Shumagins, Alaska, 21 fathoms (‘‘ Alba- 
tross’’ station 2850). 
Distribution.—From Bering Sea to Drake’s Bay, California, 20 to 93 fathoms 
(Rathbun). 
Remarks.—This species is very near S. gracilis, from which it differs in the 
longer basal scale of the antennules, in the lower position of the pterygostomian 
spine, in the presence of epipods on the maxilliped and first two pairs of feet 
(Rathbun). 
Spirontocaris gracilis (Stimpson) 
Hippolyte gracilis Stimpson, Proc. Acad. Nat. Sci. Phila., 16, 155, 1864. 
Heptacarpus tenuissimus Holmes, Occas. Papers Calif. Acad. Sci., 7, 203, 
1900. 
Heptacarpus? gracilis Holmes, ibid., 7, 205, 1900. 
Spirontocaris gracilis Rathbun, H. A. E., 10, 77, fig. 31, 1904. 
Fig. 37. Spirontocaris gracilis, 9, lateral view, X 2 (from Rathbun, U. 8S. 
N. M.). 
Characters.—Rostrum very slender, similar to that of S. flea, scarcely higher 
than wide; armed above with four spines, the posterior on the carapace, the 
anterior near middle of rostrum; armed below with four or five small distant 
teeth. The spine on the outer side of the base of the antennules does not reach 
beyond, or only slightly beyond the first segment of the peduncle. Third maxilliped 
without an epipodite (see Remarks). Abdomen strongly geniculated or bent at 
a right angle at the third segment, which is posteriorly produced and compressed 
forming a smooth, rounded earina; sixth segment more than twice but not three 
times as long as wide, and not longer than the telson. 
Dimensions.—Type: length 31.8 mm. 
Type Locality.—Puget Sound. 
Distribution —From the Shumagins, Alaska, to Santa Catalina Island, Califor- 
nia, 21 to 47 fathoms. 
Remarks.—This is, so far as known, the only Spirontocaris from the west 
coast of America in which the third maxilliped lacks an epipodite. 
Biological Survey of San Francisco Bay.—Spirontocaris gracilis 
was taken at three outside stations, D 5785, 5786, 5791, which were 
