CALIFORNIA STALK-EYED CRUSTACEA. 219 



Length from tip of rostrum to tip of telson, 182 mm.; rostrum, 24 mm.; 

 carapace including rostrum, 41 mm.; acicle, 27 mm.; external maxillipeds, 

 45 mm.; first chelipeds, 35 mm.; carpus and hand of same, each 8 mm.; 

 carpus of second chelipeds, 14 mm.; hand of same, 9 mm.; carpus of third 

 chelipeds, 23 mm.; hand of same, 10.5 mm.; sixth abdominal segment, 25 

 mm.; height of same, 19 mm. 



Specimens examined, one male from near Anaheim, 

 Calif., and two specimens, male and female, from San 

 Francisco Bay. 



Closely allied to P. braziliensis but having shorter 

 and stouter legs. This species is also closely allied to 

 canaliculatus, but, so far as I can obtain information 

 concerning the latter species, our California forms differ 

 from it in having a tooth at the posterior end of the 

 sixth abdominal segment, in having the longitudinal 

 ridges on the carapace spreading somewhat in the mid- 

 dle instead of running parallel; the anterior chelipeds 

 are a little shorter than Bate's figure represents them to 

 be in the typical form of canaliculatus. Possibly the 

 California forms will later be connected with braziliensis 

 or canaliculatus, but it is best, I believe, at present to 

 regard them as forming a distinct species. Collection 

 California Academy of Sciences. 



Suborder STOMATOPODA. 



Carapace small, leaving the last three or four segments of the thorax 

 uncovered. Eostrum separated from the carapace by a movable joint. 

 Eye-peduncles situated like the antennules on a movable segment. First 

 five pairs of thoracic appendages not biramous, the second pair large and 

 chelate, last three pairs biramous and gressorial. Abdomen large, gener- 

 ally depressed; the first five pairs of pleopods with external gills. Uro- 

 pods large and forming with the telson a strong tail-fin. 



Genus Pseudosquilla Dana. 



Abdomen smooth and strongly convex above, the sixth segment not 

 fused with the telson. Telson with well developed submedian spines 



