io6 



RATHBUN 



length; upper margin armed with 10 to 14 teeth, including 2 or 3 on the 

 carapace ; lower margin with i to 3 spines ; tip acute. A strong antennal 



FlG. 48. Spironiocaris maercphthalma. Station 3076. a. Side view, $ (X 2). 

 b. Dorsal view of anterior portion, ? (X zj). 



spine on the anterior margin, no supraorbital nor pterygostomian spine ; 

 antero-lateral angle sharp. 



Eyes large, pyriform ; corneas extending on the inner side almost to 

 the base of the peduncle. Eyes reaching two thirds the length of the 

 first antennular segment ; this segment is twice as long as the second, 

 and the second three times as long as the third ; the second and third 

 are each provided with a terminal spine ; the peduncle does not reach 

 the end of the rostrum ; the thickened part of the outer flagellum exceeds 

 by half its length the antennal scale ; inner flagellum half again as long 

 as outer ; the basal scale does not quite reach the end of the first seg- 

 ment ; it has a strong lobe on its proximal outer margin. The peduncle 

 of the antennas extends to the end of the second segment of the anten- 

 nulae and the middle of the scale ; the flagellum is one and a third times 

 the length of the body. The blade of the scale exceeds the spine con- 

 siderably, and is most advanced toward its inner margin. 



The outer maxillipeds are slender and reach midway between the end 

 of the antennal peduncle and the end of the scale. The first pair of feet 

 reach just beyond the base of the scale ; the second pair just beyond the 

 end of the scale ; of the carpal joints, the second is greater than the first, 

 the first plus the second equals the third, the fourth equals the seventh, 

 the fifth is greater than the sixth, the fifth plus the sixth exceeds a little 

 the seventh. The last three pairs of feet are long, fragile, and unarmed ; 



