84 



RATHBUN 



SPIRONTOCARIS CARINATA (Holmes). 



Heptacarpus carinatus Holmes, Occas. Papers Calif. Acad. Sci., vii, 202, 

 pi. Ill, fig. 60, 1900. 



Distribution. — ¥xom Monterey Bay, shallow water (Holmes), to Point 

 Loma, California {Albatross, one specimen). 



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

 extend about one third the length of acicle. 



SPIRONTOCARIS STYLUS (Stimpson). 



Hippolyte stylus Stimpson, Proc. Acad. Nat. Sci. Phila., xvi, 154, 1864 

 (June). 



Hippolyte esquimaltiana BATE, Proc. Zool. Soc. London, 1864 (read De- 

 cember 13), 666. 



Hyppolyte esquimaltianus BATE, in Lord's The Naturalist in Vancouver 

 Island and British Columbia, 11, 278, 1866, 



A rather slender species. Rostrum about one third longer than cara- 

 pace, exceeding acicle, slender, somewhat styliform, horizontal and 



straight, armed above with 

 4 or 5 teeth near its base 

 (one on the carapace in- 

 cluded) and 5 or 6 teeth 

 below. An antennal, but 

 no pterygostomian spine. 

 Eyes small, Antennu- 

 lar peduncle reaching 

 about two fifths the length 

 of the acicle ; second and 

 third segments very short ; 



Fig. 36. Spirontocaris stylus. ? . Barclay Sound, a. Side oUtCr flagcllum SCarCClv 

 of carapace and abdomen (X 2). ^. Dorsal view of anterior per- " ^ 



*^°"<X3)- reaching the terminal 



fourth of the acicle ; inner flagellum exceeding acicle ; basal scale not 

 reaching beyond first segment. Antennal peduncle extending to end of 

 second segment of antennular peduncle ; acicle (measured along outer 

 margin) shorter than carapace. 



Maxillipeds short, slightly exceeding antennal peduncle ; first pair of 

 feet stout, not exceeding eyes ; second pair reaching to middle of acicle ; 

 fifth pair scarcely to end of maxilliped. 



The abdomen is strongly geniculated, though the third segment is 

 gently rounded in profile ; fourth segment unarmed ; sixth segment not 

 quite twice as long as fifth ; telson with 3 pairs of side spinules. 



I think there is little doubt that Bate's H. esquimaltiana belongs here. 



