62 University of California Publications in Zoology [Vol. 23 



Spirontocaris carinata (Holmes) 



Hcptacarpus carinatus Holmes, Oceas. Papers Calif. Acad. Sei., 7, 202, 



pi. 3, fig. 60, 1900. 

 Spirontocaris carinata Eathbun, H. A. E., 10, 84, 1904. 



Fig. 39. Spirontocaris carinata, lateral view of carapace and abdomen (after 

 Holmes). 



Characters. — Eostrum deep, one-fourth as deep as long; armed above with 

 four to six small teeth, the posterior one on the carapace, the anterior one a little 

 behind the middle of the rostrum, below with four to six teeth, the anterior 

 of which is commonly near the tip. Basal spine of the antennules reaches about 

 to the tip of the first segment of the peduncle. Third segment of abdomen 

 is posteriorly produced and crested; sixth less than twice as long as wide, and 

 shorter than the telson. 



Dimensions. — Single specimen in the IT. S. National Museum : length from 

 tip of rostrum to end of telson 48 mm., of rostrum 9 mm., of carapace 9 mm., 

 of telson 6 mm. 



Color. — Varies with surroundings. Specimens among bright green seaweeds 

 are of a uniform bright green color, while the specimens living only a few yards 

 away among the red seaweeds imitate almost exactly the color of the algae that 

 surround them (Holmes). 



Type Locality. — Monterey Bay, California. 



Distribution. — From Monterey Bay, shallow water (Holmes), to Point Loma, 

 California ("Albatross" one specimen) (Eathbun). I have also seen a specimen 

 dredged at Laguna Beach by Prof. W. A. Hilton in 10 to 15 fathoms. 



Bemarlcs. — The eyes of this species are very slender. The antennular peduncles 

 extend about one-third the length of acicle (Eathbun). 



