SOME NEW-ZEALAND SCHIZOPODA. 483 



joints of the legs, (5) in having the last caudal segment as long 

 as the two preceding taken together, and (6) in the form of the 

 apex of the telson. 



The adult specimens attain a length of fully 10 mm. The 

 antennal scale (fig. 2) is about three times as long as broad, the 

 apex is obliquely truncate, and the outer margin is produced into 

 an acute spine or denticle. The legs (fig. 3) have the propodal 

 joint distinctly divided into two articulations, the proximal being 

 the shorter. The telson (fig. 4) is rather slender, and tapers con- 

 siderably towards the apex ; the latter is very narrow and 

 obtusely truncate, and bears three short spines between the 

 rather long terminal spines of the margin, in this respect 

 somewhat resembling 8. gracilis. The uropods (fig, 5) project 

 considerably beyond the telson. The inner plate is narrow- 

 lanceolate, with the auditory apparatus very fully developed and 

 the inner edge spinose. The outer plate is somewhat longer 

 than the inner, and has the outer edge of the basal joint armed 

 with spines, which in large specimens are from ten to twelve in 

 number, and which increase in size posteriorly. 



Sal. I have only met with this species in Otago Harbour, 

 though it is probably common; but Mr. Suter has sent me one 

 (mutilated) specimen from Lyttelton Harbour. In tbe Eeport 

 on the Schizopoda of the ' Challenger ' Expedition, Prof. Gr. 0. 

 Sars states that both species of Siriella (8. TJiompsoni and S. 

 gracilis) were taken at the surface of the sea. The former has a 

 very wide range, having been taken in the Atlantic and Pacific 

 Oceans, and in the Tasman Sea ; the latter occurs in the seas of 

 the Indian Archipelago and in the Pacific Ocean. My specimens 

 were taken in the dredge in 6 fathoms of water. I have only 

 met with the species once. 



Genus Tenagomtsis, dov. gen. 



Generic characters. — Body slender, as in Mysis. Dorsal shield 

 short, not covering more than half of the cephalothorax ; front 

 obtusely pointed. Antennary scale narrow-lanceolate, setose on 

 both margins. Mandibles with well defined molar tubercle 

 palp with a much dilated second joint (PL 34. figSo 9 & 10) 

 Maxillae and maxillipedes as in Mysis. Eeet rather slender and 

 weak. 



Marsupial pouch in the female formed of three pairs of laminae 



