54 University of California Publications in Zoology [Vol. 23 



Spirontocaris bispinosa Holmes 



Spirontocaris bispinosa Holmes, Occas. Papers Calif. Acad. Sci., 7, 207, 

 1900; Eathbun, H. A. E., 10, 68, fig. 23, 1904/ 



Fig. 30. Spirontocaris bispinosa, J, lateral view of carapace, X 2 (from Eath- 

 bun, U. S. N. M.). 



Characters. — Eostrum a little longer than remainder of carapace. Distal half 

 of rostrum a slender, styliform process, with a strong upward trend, devoid of 

 teeth above and with a single tooth below. Basal half of rostrum high and 

 laminate, continued backward over the anterior two-thirds of the carapace as a 

 carina, armed above with ten to twelve teeth which decrease in size and become 

 more closely set anteriorly, there being several small teeth crowded together where 

 the rostrum is abruptly narrowed ; the two posterior dorsal teeth are the two 

 median spines of the carapace proper ; below . the basal half of the rostrum is 

 armed with three or four low teeth. First three abdominal segments laterally 

 rounded. Dactyls of ambulatory legs about one-half as long as their propodi. 



Dimensions. — Of an ovigerous female, approximate length 59.5 mm., length. of 

 carapace and rostrum 25.2 mm., of rostrum 14.8 mm. (Eathbun). 



Type Locality. — Puget Sound. 



Distribution. — From Yes Bay, Alaska, to off San Diego, California, 13 to 211 

 fathoms. 



Spirontocaris snyderi Eathbun 



Spirontocaris snyderi Eathbun, Proc. IT. S. Nat. Mus., 24, 894, 1902; 

 H. A. E., 10, 69, fig. 24, 1904. 



Fig. 31. Spirontocaris snyderi, J, lateral view of carapace, X 2% (from Eath- 

 bun, U. S. KM.). 



Characters. — Median spines of the carapace proper three or four; between 

 these spines and the small ones on the rostrum there is a considerable space ; 

 rostral teeth five or six above and three or four below. Eostrum a little shorter 

 than remainder of the carapace, much the shape of that of S. bispinosa except 

 that the mid-rib is more rapidly ascending and ends in a short point and that the 

 upper lamina is more shallow and of rather even depth. First three abdominal 

 segments laterally rounded. Dactyls of ambulatory legs one-third as long as their 

 propodi or less than one-third. 



