176 BuUeiin Vanderhilt Marine Museum, Vol. V 



and one-half times as long as the merus, with the fingers comprising a 

 little over one-third of this length; the outer surface of the palm is 

 smooth, convex. The fingers of both claws are slender, both very 

 much deflected, forming a decided curve. The cutting edges meet 

 throughout their length and are furnished with a few shallow teeth, 

 the finger tips are pointed. 



The ambulatories are rather short, and very strong, successively 

 decreasing in length in the order 1, 2, 3, 4. Each has the merus short 

 and expanded, two-thirds as wide as long with the outer inferior distal 

 margin forming a rounded laminate process ; the carpus is short, pro- 

 duced to a curved, strong, acuminate process at its outer distal angle, 

 strengthening the joint with propodus ; the latter is about one and one- 

 half times as long as the carpus of the same width, compressed cylindri- 

 cal, with the lateral margins finely setose ; the dactyl is stocky, almost 

 as long as the related propodus, slightly tapered, with the lateral mar- 

 gins setose and a strong blunt horny tip, that is divided into four teeth 

 or claws of graduated lengths, and lying side by side across the end of 

 the dactyl ; in addition to these there are a series of five or six horny, 

 small spinules along both the lower and upper lateral margins of the 

 dactyl. 



The eye is set upon a short, stout stalk that has a rounded process 

 projecting on the dorsal surface of the cornea; the cornea is large, 

 black, hemiovoid, set obliquely, with an excellent visual range in all 

 directions. 



The antennulae are large and fold transversely within the rather 

 open f ossett which lies beneath the frontal margin and is divided by a 

 median septum. 



The antennae have the basal peduncular article small and bulbous 

 and situated outside the orbital sinus at the distal end of the anten- 

 nulary f ossett ; the second and third peduncular articles are small, the 

 flagellum is very slender and when extended is a little longer than the 

 long diameter of the orbit. 



The external maxilliped has the exognath narrow, rodlike, tapered 

 distally; the ischium of the endognath is nearly twice as long on the 

 outer margin as wide on the slightly bowed outer margin ; the proximal 

 margin is obliquely truncated with the inner angle rounded ; the inner 

 lateral margin is subparallel to the outer ; the distal margin is not quite 

 straight, slightly excavate ; the merus is scarcely wider than long, with 

 its inner and outer lateral margins convex and its distal margin also 

 rounded and slightly truncated at the base of the palp, which is com- 

 posed of three, stocky, tapered articles. 



