264 THE SCHIZOPODA. 



Fig. 3a represents the left maxillula, seen from behind; the palp is long, 

 somewhat slender, increasing a little in breadth from the base to the obliquely 

 truncate end, and the terminal margin has several slender setae and two stiff, 

 nearly spiniform ones, the most distal (fig. 3b) serrate beyond the middle. — 

 The maxillae (fig. 3c) have the palp still longer than in A'', gracilis, as long as 

 the inner margin of the lobe of third joint and nearly twice as long as broad. 



A large female is 19.9 mm., a large male 17.8 mm. long. 



Distribution. — The list of Stations shows that N. tenella was found in nearly 

 the whole part South of the Hne of the area explored, excepting in a broad longi- 

 tudinal belt along South America. As already stated, the specimens from Lat. 

 12° 34' N. referred in 1894 by Ortmann to N. tenella belong to A^. gracilis H. J. H. ; 

 on the other hand, one of the specimens from Hyd. Sta. 2627 (Lat. 0° 36' N., 

 long. 82° 45' W.) and one of the specimens from Sta. 3414 (Lat. 10° 14' N., long. 

 96° 28' W.) referred by him to N. mtcrops belong to N. tenella. Furthermore 

 the species was taken in the Indian Archipelago by the "Siboga" at a number 

 of Stations; Sars's type was captured South of the Cape of Good Hope, and 

 finally it is known from the Eastern Atlantic between the Canary Islands and 

 Lat. 36° 46' N. 



NEMATOBRACHION Calman. (1905). 

 (Nematodactylus Calm., 1896). 



Description. — Carapace with a cervical suture and without any denticle 

 on its lateral margins. — Eyes divided into two sections, the upper broader than 

 the lower and with its upper surface somewhat flatly vaulted. — Antennulae 

 similar in both sexes; peduncles at least somewhat robust; flagella long, slender, 

 and multi articulate. — Antennae with the spiniform process from the outer 

 end of the subbasal joint short, about as long as the breadth of the squama; 

 last joint of the peduncle of the endopod as long as or longer than the penultimate 

 and not reaching the end of the squama. — Mandibles with a three-jointed 

 palp. — Maxillulae with or without pseudexopod; the palp slender and at least 

 rather long. — Maxillae with their main part, viz. second and third joints with 

 their lobes, very broad in proportion to the fourth joint, the palp, which is well- 

 marked off, and both lobes with the margin a little bifid. 



First pair of thoracic legs only a little longer than the maxillipeds and of 

 the usual structure, slender, with the short last joint a little widened below 

 and furnished with peculiar, short setae. Second pair extremely elongate, 

 without setae or hairs; its third joint thick; fourth joint at most as long as the 



