1921] Schmitt: The Marine Decapod Crustacea of California 65 
Biological Survey of San Francisco Bay.—Spirontocaris paludicola 
was found in shallow water, in patches of eel grass along the Raccoon 
Strait’s shore of Angel Island, where one specimen was taken by 
means of a boat-dredge in 2 to 514 fathoms (D 5763), and among 
the algal growths in pools on the tidal flats north of the Standard Oil 
pier, Richmond, where also only a single specimen was obtained. 
IV. Group with no supraorbital spines—(Continued) 
Section b. Rostrum shorter than the carapace, not exceeding three-fourths its 
length. (In this subgroup the third maxillipeds exceed the antennal scale except 
in occasional specimens of S. picta, in which the maxillipeds attain but fail to 
reach beyond the tip of the antennal scale, and in S. macrophthalma, in which they 
fall short of the tip of the antennal scale. In S. taylori, palpator and brevirostris 
the third maxillipeds exceed the tip of the antennal scale by the whole, or the 
greater part of the terminal joint, and occasionally in some adults of the two 
latter species by the two last joints of the maxillipeds. In S. cristata and the 
greater number of specimens of S. picta the third maxillipeds only slightly exceed 
the antennal scale. In S. brachydactyla the third maxillipeds exceed the antennal 
scale by half the length of the last joint. The basal spine of the antennules in 
all the above species usually reaches to about the middle of the second segment 
of the peduncle, except in S. macrophthalma and 8. brachydactyla; in the former 
it does not quite reach the end of the first segment, while in the latter it varies 
from being slightly shorter to slightly longer than the first segment of the anten- 
nular peduncle.) (For section a, see p. 58.) 
Spirontocaris palpator (Owen) 
Hippolyte palpator Owen, in Zoology of Captain Beechey’s Voyage (in 
the ‘‘Blossom’’), Crustacea, p. 89, pl. 28, fig. 3, 1839. 
Heptacarpus palpator Holmes, Occas. Papers Calif. Acad. Sci., 7, 196, pl. 3, 
figs. 48, 49, 1900. 
Spirontocaris palpator Rathbun, H. A. E., 10, 98, 1904; Hilton, Jour. Ent. 
Zool., Pomona Coll., 8, 69, 1916; ibid., 10, 54, 1918. 
\ 
a b 
Fig. 43. Spirontocaris palpator; a, lateral view of carapace; b, acicle (after 
Holmes). 
Characters.—Antennal scale longer than the telson; antennal peduncle reaching 
about to the middle of the scale. Rostrum reaching cornea or beyond, but not 
exceeding first segment of antennular peduncle; armed above with four to seven 
teeth, the last two or three of which are on the carapace; below without teeth 
or a small one near the tip; tip of rostrum usually simple, sometimes bifid or trifid. 
