Boone, Crustacea, Cruise of "Alva," 1931 147 



of the flagellum is quite fine and reaches to the tip of the fingers 

 of the smaller great cheliped. The peduncle is as long as the tip 

 of the rounded or inner convex distal margin of the scaphocerite. 

 The carpocerite is conspicuous, consisting of a lobate proximal 

 portion of about three-fifths with convex margins, tapering dis- 

 tally two-fifths to a very acuminate point which extends to half- 

 way, or beyond, of the second articles of the antennulae. 



The antennae have the basal article strong, the scaphocerite 

 shortish, with the inner convex portion no longer than the an- 

 tennular peduncle, the outer lateral portion somewhat thicker 

 than the inner, this flat carina tapering to an acuminate point or 

 spine slightly outward curved and extending quite a millimeter 

 beyond the inner portion and not very wide at any point; the 

 margins are fringed with long web-like setae; the second and 

 third peduncular articles are cylindrical, together extending to 

 the distal margin of the scaphocerite ; the flagellum is simple, fine, 

 extending for 5 to 10 millimeters beyond the longer inner branch 

 of the antennulae. 



The great cheliped is most unfortunately missing. 



The smaller first cheliped has the merus slender, elongate, 

 triquetral, armed with an acute tooth at both the upper and lower 

 inner and distal outer angles and a rounded protuberance at the 

 outer distal angle. The carpus is short, cup-like, distally concave 

 for reception of the propodus and with a sinuous indentation of 

 this margin ; the propodus, including the fingers, is 7 mm. long, 

 the palm being 3 mm. long and the fingers 4 mm. long, with the 

 upper proximal area of the palm channelled by a sulcus that de- 

 fines an obconic area ; the palm terminates distally in a tooth on 

 either side of the base of the upper finger, the tooth on the inner 

 side of the palm being more acute than that at the outer angle, 

 which is rounded; the fingers are slender, the lower one deeply 

 channelled throughout its entire length, the apex a small upcurved 

 tooth. The upper finger is produced along its inner lateral margin 

 into a definite carina but closes immediately inside the edge of 

 the inner lateral margin of the lower finger, and beyond this carina 

 the upper finger is concavely excavate, thus exposing the inner 

 channel of the lower finger and giving these two fingers, when 

 closed, the aspect of a concave, elliptical sulcus between them 

 when examined from the outer side. There are a few solitary long 

 setae on the upper and outer margins of both the palm and 



