64 University of California Publications in Zoology [Vol. 23 



Characters. — Eostrum 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. 



Di?nensioris. — Type: length, 63.5 mm. 



Color. — Eed (Owen). 



Type Locality. — Monterey, California. 



Distribution. — Monterey, California (Owen), Esquimalt Harbor, Vancouver 

 Island (Bate). 



Spirontocaris paludicola (Holmes) 



Eeptacarpus paludicola Holmes, Occas. Papers Calif. Acad. Sci., 7, 201, 



pi. 3, figs. 56, 57, 1900. 

 Spirontocaris paludicola Eathbun, H. A. E., 10, 101, 1904. 



a b 



Fig. 42. Spirontocaris paludicola; a, lateral view of carapace; b, acicle (after 

 Holmes). 



Characters. — Third maxillipeds exceeding the antennal scale. Eostrum 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. 



Bemarlcs. — Occasional 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 S. picta. 



