64 University of California Publications in Zoology  [Vou. 28 
Characters.—Rostrum armed above with about ten unequally spaced teeth, the 
last three of which are on the carapace; below with four or five nearly equal 
teeth in front of the middle of the rostrum. 
Dimensions.—Type: length, 63.5 mm. 
Color.—Red (Owen). 
Type Locality—Monterey, California. 
Distribution.—Monterey, California (Owen), Esquimalt Harbor, Vancouver 
Island (Bate). 
Spirontocaris paludicola (Holmes) 
Heptacarpus paludicola Holmes, Oceas. Papers Calif. Acad. Sci., 7, 201, 
pl. 3, figs. 56, 57, 1900. 
Spirontocaris paludicola Rathbun, H. A. E., 10, 101, 1904. 
eS) 
b 
a b 
Fig. 42. Spirontocaris paludicola; a, lateral view of carapace; b, acicle (after 
Holmes). 
Characters.—Third maxillipeds exceeding the antennal scale. Rostrum slender, 
about as long as carapace, reaching nearly to or slightly beyond the end of the 
antennal scale, armed above with six to eight evenly spaced teeth, the last tooth on 
the anterior fourth of the carapace; armed below with two to four teeth on the 
distal third or two-fifths of the rostrum. Third segment of the abdomen smoothly 
rounded above, not carinate or with posterior margin produced; sixth segment 
about one and one-third or one-half times as long as wide and shorter than the 
telson, which is shorter than the antennal scale. 
Dimensions.—Length of the specimens taken in San Francisco Bay ranged 
from 22 to 32 mm., from tip of rostrum to end of telson. 
Color.—Uniform green (Holmes). 
Type Locality—Humboldt Bay, California. 
Distribution British Columbia to San Diego, California. 
Remarks.—Oceasional specimens of this species have been found with the 
rostrum shorter than the carapace and antennal scale as well, a rare and appar- 
ently abnormal condition. In such cases, in preserved material, it is quite difficult 
to distinguish the species from S. picta. However, the rostrum always reaches 
about to the middle of the thicker flagellum of the antennules or beyond, while © 
in S. picta the rostrum only slightly exceeds the antennular peduncle, if at all. 
On the whole, S. paludicola runs larger in size. In specimens of relatively the 
same size the rostrum and acicle are comparatively longer in S. paludicola; the 
teeth on the lower side of the rostrum are apparently not quite so bunched near 
the tip as in S. picta, but are more widely and evenly separated; the sixth abdom- 
inal segment is longer and comparatively not quite so stout; and the posterior 
ambulatory legs are much more slender than in 8S. picta. 
