Boone, Crustacea, Cruise of "Alva," 1931 115 



of the antennulae ; the flagellum is very fine, broken. The scapho- 

 cerite is half as long as the rostrum, elongate, widest on the proxi- 

 mal half, with the inner lateral margin convex, crenulate, ciliated, 

 narrowing distally toward the evenly convex distal margin ; the 

 outer lateral margin is straight, slightly thickened, terminating 

 in a small, acute tooth that extends not quite so far as the ciliated 

 convex, distal margin. 



The external maxillipeds are pediform, extend to midway the 

 length of the third pair of legs, are subcylindrical, as wide as, and 

 stouter than, thepe legs and are beset with spinose bristles in tufts 

 on the distal two joints ; several very strong bristles are present 

 on the apex. 



The first pair of legs are distinctly the shortest of the series, 

 being not quite so long as the external maxillipeds ; with the dactyl 

 much elongated, slightly more than half as long as the related 

 propodus, very tapered, acuminate, stylet-like, the tip being fur- 

 nished with a small series of curved, hook-like spines in graduated 

 series, the shortest ones being nearest the tip. 



The second pair of legs are unequal, with multiarticulate car- 

 pal joint and weakly chelate. (These legs are missing in the 

 present specimen.) 



The third, fourth and fifth pairs of legs are subequal, quite 

 long, and exceedingly slender, each with the inferior lateral mar- 

 gins of the meral, carpal, and propodal articles and proximal half 

 of the dactylar articles, beset with a series of articulate spines. 

 The various joints are reinforced ; the dactyli are each about one- 

 third as long as the related propodi and are very slender, curved, 

 acuminate. 



References: Nothocaris binoculis. Bate, C. S., Rept. H. M. S. 

 ''Challenger," ZooL, Macrura, vol. XXIV, 1888, p. 656, pi. 

 114, fig. 2. 



Plesionika binoculis, DE Man, J. G., "Siboga"-Expeditie Decapoda, 

 pt. 4, Monogr. 39a-3, 1920, p. 134, pi. 12, fig. 30. 



Genus: PARAPANDALUS Borradaile 

 Parapandalus serratifrons Borradaile 



Type: The type series of seven males was secured by Dr. 

 Willey, in 50 to 100 fathoms, Blanche Bay, New Britain, and is 

 deposited in the British Museum. 



