DECAPODS 69 
Southwest of San Nicholas Island, 158 fathoms, station 2898. 
Off San Diego, 124 fathoms, station 2935. 
SPIRONTOCARIS SNYDERI Rathbun. 
Spirontocaris snydert RATHBUN, Proc. U. S. Nat. Mus., XxIv, 894, 1902. 
This species bears a curious resemblance to 5S. dispinosa, in general 
terms it is a dispinosa with the slender spine of the rostrum broken off; 
but a closer examination shows other and more radical differences. The 
specimens, among which are several egg-bearing fe- 
males, are all smaller than S. dispinosa, but this is not ‘ 
absolute proof that the species is smaller, because the 
females of S. dispinosa are fertile when rather small. 
The median spines of the carapace proper are 3 OF gupnit idee? Caan 
4, instead of 2, as in S. dispinosa, and are larger; ° * (78) Station 2886. 
the last spine is at the posterior two fifths of the carapace. Between 
these spines and the small ones on the rostrum there is a considerable 
space. The rostral teeth are 5 or 6 above, 3 or 4 below. The rostrum 
is a little shorter than the carapace and is much the shape of that of 
S. bispinosa, excepting that the midrib is more rapidly ascending and 
ends in a short point in front of the laminz, and the upper lamina is 
shallower and of rather even depth throughout its length. 
The antennal peduncle reaches only about a third the length of the 
scale, in .S. dispinosa half the length of the scale. The first pair of 
chelipeds reach the end of the antennal peduncle; in S. dispinosa they 
are shorter. The dactyls of the third, fourth, and fifth pairs of feet, 
which are very long in SS. dispinosa (about half as long as the propodi), 
are in S. szyderi a third, or less than a third, as long as their propodi. 
Dimensions.—Ovigerous @, length (approximate) 28 mm., length of 
carapace and rostrum g.4 mm., of rostrum 4.4 mm. 
Distribution.—From Puget Sound to Lower California, as follows: 
Puget Sound (T. Kincaid). 
Heceta Bank, Oregon, 50 fathoms (A/batross station 2886). 
Monterey Bay, California, type locality (J. O. Snyder). 
Near Lobos Rocks, 77 fathoms (A/ébatross station 3184). 
Off Santa Catalina Island, 47 fathoms (A/éarross station 3663). 
Southern California (W. H. Dall). 
Off Cerros Island, Lower California, 44 fathoms (A/batross station 2838). 

SPIRONTOCARIS SICA Rathbun. 
Spirontocaris sica RATHBUN, Proc. U. S. Nat. Mus., XXIV, 894, 1902. 
Allied to S. dispinosa, but inhabiting deeper water on the coast of 
California. Differs as follows: The teeth of the dorsal carina begin 
