DECAPODS 



131 



spine is larger and farther forward, advancing to a line in front of the 

 rear line of the orbits ; the antero-lateral spine is longer and slenderer and 

 bent more outward ; the rostrum is narrower, longer, and acute, and as- 

 cends at an angle equal to that of the spine directly behind it ; the spine 



Fig. 70. Crangon spinosissima. S (X 2). Station 3351. a. Dorsal view 

 of carapace, b. Side view. 



of the antennal scale is much shorter than the blade ; the hand is longer 

 and narrower, and its anterior margin more longitudinal ; the spines of the 

 ventral surface of thorax and abdomen are long and slender. This species 

 furthermore differs from those hitherto described in having the segments 

 of the pleon armed laterally with spines, the first three segments with two 

 spines each, the next three with one spine each at the postero-lateral angle ; 

 the sixth segment also with a slender spine at the postero-superior angle. 



Dimensions, — YtvcidXt^ length of body 36 mm., of carapace 10.5 mm. 

 Male, length of body 34.6 mm., of carapace 10 mm. Length of hand 

 loose in bottle 5 mm., width 1.4 mm. 



Type locality. — O^ Point Arena, California, 51 fathoms [Albatross sta- 

 tion 3351). 



Distribution. — O^ Oregon and California, 51-96 fathoms: 

 Off False Tillamook, Oregon, 62 fathoms, station 3090. 

 Off Point Conception, California, 96 fathoms, station 2906. 



CRANGON SPINIROSTRIS Rathbun. 



Crangon spinirostris Rathbun, Proc. U. S. Nat. Mus., xxiv, 891, 1902. 



Also allied to C. inunita and its associates, but differing from them all 

 in its long spiniform rostrum. 



The position of the spines of the carapace is 

 similar to that in C. mimita. The rostrum and the 

 spine behind are long, slender, and suberect, the 

 rostrum the longer. The orbital spine is slender 

 and ascending ; the antero-lateral spine is directed 

 upward and outward. The spines of the first two 

 antennular segments are slender ; that of the anten- 

 nal scale is longer than usual, exceeding the blade. 

 The hand is about three times as long as wide. Of 

 the projecting plates on the ventral surface of the thorax in the male, the 



Fig. 71. Crangon spini- 

 rostris. $ (X 2)- Station 

 332g. a. Dorsal view of 

 carapace, b. Side view. 



