98 Bulletin Vanderbilt Marine Museum, Vol. VI 



strong, the peduncle and outer blade together being four-fifths as 

 long as the telson ; the peduncle, dorsally flat, is divided distally 

 into a rounded outer lobe above the base of the outer blade and a 

 narrower pointed lobe above the base of the inner blade. The 

 outer blade is one and one-fourth times as long as the telson and 

 is thickened on the outer side but has no subdistal spine ; the outer 

 lateral margin is nearly straight, while the inner lateral margin 

 is more rounded in the median region and narrowed toward the 

 rounded apex. The inner blade is only three-fourths as long as 

 the outer, of the same width, but more obliquely truncated distally 

 on the inner distal margin. 



The eye is large, the stalk dorsally flattish, with a blunt node 

 at the outer proximal lateral angle ; the cornea is large, renif orm, 

 set obliquely terminal, with excellent peripheral visual range. The 

 distal margin of the cornea extends slightly beyond the fifth dorsal 

 rostral tooth. 



The antennular peduncle extends about 0.5 to 1.0 millimeter 

 beyond the tip of the rostrum in large specimens ; the first joint is 

 greatly modified for the protection of the eye, being produced into 

 a double laminate process curved over on the outer and upper 

 proximal border, the inner pointed portion of this process form- 

 ing a support beneath the eyestalk, while the more curved outer 

 portion protects the cornea ; setae fringe both portions ; the distal 

 half of the lateral border of this article is thickened, tapered to a 

 point and setae-fringed on both upper and lower lateral margins ; 

 the article is laminate-concave beneath the cornea and setae- 

 fringed across the distal border, which is just beyond the cornea; 

 the proximal inner lateral angle is upcurved and supports a nar- 

 rowed, elongate, scaphocerite-like process that extends in a verti- 

 cal plane along the inner marginal line beyond the cornea to 

 about midway the second peduncular article ; this process is nar- 

 rowed proximally, widening distally, the outer lateral margin 

 sinuate, corresponding to the adjacent orbital lateral margin, and 

 is oar-blade-like distally, being also setae-fringed on the outer and 

 distal margins ; the second article is strong, three-fourths as wide 

 as long, quite thick in the median region, sloping towards the 

 lateral margins ; the third article is shorter and narrower, rounded 

 at the outer distal angle which supports the smaller branch of the 

 flagellum, the thicker, superior branch arising from the outer 

 angle of the peduncle and extending for a distance equal to four- 



