Boone, Crustacea, Cruise of "Alva," 1931 81 



of the palm, opposite the outer carpal spine ; the fingers are two-thirds 

 as long as the palm, curved, with rounded, dentate tips, the cutting 

 edges also dentate ; interfitting and closed on the outer side, but with 

 an elliptical gape when viewed from the inner side. 



The first, second and third pairs of ambulatories are similar, quite 

 long and slender, the first and second pairs nearly equal; the third 

 pair shorter, each with an acute distal spine at the posterior lateral 

 margin of each the meral and propodal joints, while there is a similar 

 subdistal spine on the anterior lateral margin of the carpus ; the dac- 

 tyli are each slightly longer than the related propodus, slender, 

 tapered, longitudinally fluted on the upper surface with a spiny 

 curved tip and beset with a series of fine horn-color spines along the 

 inner lateral margin and also the distal portion of the outer lateral 

 margins. There are long solitary hairs arising from the lateral mar- 

 gin of the meral, carpal and propodal joints of these three pairs of 

 legs. 



The fourth pair of legs is natatory. 



The eyes are large, the cornea terminal, nearly spherical, with ex- 

 cellent visual range in all directions. 



The antennulae have the basal article enlarged; the second and 

 third articles long, slenderer, subequal, the flagellum is short, two- 

 branched, the smaller whip composed of about six articles ; the thicker 

 fleshy whip is about of the same length and has a dense tuft of setae. 

 The antennulae lie within a small fossett beneath the frontal margin 

 and this is divided by a thick septum. 



The antennae have the characteristic basal article ; the second and 

 third articles small, cylindrical ; the flagellum is quite long, consisting 

 of about twenty rings and extending to the outer orbital angle. 



References: Thalamita Thalaniitoides tridens A. Milne Edwards, 

 Nouv. Archiv. Mus. Hist. Nat. Paris, p. 149, pi. 6, figs. 1-7, 1869. 

 — Alcock, Journ. Asiatic Soc. Bengal, vol. 68, pt, 2, p. 9, 1899. — ^de 

 Man, Notes Leyden Mus. vol. Ill, p. 9, 1881. 



Subfamily : Podophthalminae. 



Genus: PODOPHTHALMUS Lamarck. 

 Podophthalmus vigil (Fabricius). 



Plates 37 and 38. 



Type: Fabricius' specimen came from the Indian Ocean and was 

 deposited in the collection of "Dom. Daldorff." 



