166 Bulletin Vanderbilt Marine Museum, Vol. VI 



at Pulo Edam, Bay of Batavia ; Amboina and Ternate, and is de- 

 posited in the Leyden Museum. 



Distribution : This species, as restricted by Mr. Borradaile, 

 has in addition to the above cited localities, been reported from 

 several localities in the Red Sea by Dr. Nobili, i. e., Massaouah, 

 Djibouti, Perim and Tamatave Reef, Madagascar (Lenz) ; also 

 from the Indian Ocean (Borradaile) ; Ternate (de Man) and 

 Samoa (Kemp). The "Alva" specimen from Pago Pago, Samoan 

 Islands, appears to be the second record of this species from this 

 archipelago. 



Material examined: One specimen from Pago Pago, Samoa, 

 September 2, 1931. 



Discussion : Although the "Alva" specimen is unfortunately 

 mutilated, having the tip of the rostrum broken, the second pair 

 of legs missing and also the last two abdominal segments some- 

 what broken, sufficient evidence remains to permit the reliable 

 identification of the specimen. The specimen conforms in all 

 essentials to Mr. Borradaile's excellent figures of the species 

 (Percy Sladen Trust Expedition Report, Plate 52, fig. la) . 



The carapace is slender, compact, semitranslucent, produced 

 in the median dorsal line to a dentate rostral crest, continued dis- 

 tally as a slender, dorsally concave, distally upward-directed 

 rostral blade, the apical portion of which is broken ; the remainder 

 of the upper margin bears six spines, one epigastric in position, 

 the second above the eye, followed by three more in subequal series ; 

 somewhat more separated from these is a sixth weaker tooth, 

 near the broken tip. The inferior rostral margin is set with three 

 teeth on the distal portion. The preorbital spine is strong, acute. 

 The hepatic spine is well developed. The eye is large, bulbous. The 

 antennulae are identical with those of Mr. Borradaile's figure. The 

 basal peduncular article is half of the length of the scaphocerite 

 and is moderately incised. The antennae have the scaphocerite 

 almost as long as the rostrum, slender, the outer margin concave, 

 terminating in an acute tooth, the inner distal portion rounded. 

 The carpocerite is slender, cylindrical ; the flagellum is between 

 two and three times as long as the entire body. 



The mouthparts are like those figured by Mr. Borradaile. 



The first left leg is present and has the chela slender, with the 

 fingers longer than the palm and beset with fine, comb-like teeth 

 along the cutting edges. 



