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Transactions. 



Form 2 is similar to form I except in the propocl and dactyl. The propod 

 is quite devoid of long slender setae, and has only a few small tufts of setae 

 of the usual kind on the posterior margin ; the palm bears three prominent 

 teeth, between which are some smaller denticles, with a few scattered setae ; 

 dactvl broad with bluntly rounded apex, its inner margin slightly uneven 

 but without denticles or processes. 



Colour whitish. 



Length, up to 15mm. 



Distribution. — Shores of New Zealand, Australia, Ceylon, South Africa, 

 and Indian Ocean. Usually found at or below low-water mark. 



In New Zealand this species occurs at moderate depths in all suitable 

 localities from the Three Kings to Stewart Island. I recently obtained it 

 with the dredge at a depth of 60 fathoms at the Three Kings and at another 

 station about half-way between the Three Kings and Cape Maria van Diemen. 



Remarks. — Immature males are more like the females, the characters of 

 the gnathopoda and the broadened setose peraepoda being fully acquired 

 only in adult males. In immature specimens of form 1 the propod of the 

 second gnathopod may be densely haired, but the teeth and processes on 

 the palm much less developed or even absent, and the dactyl without the 

 denticles and process. 



In addition to New Zealand specimens. I have been able to examine 

 others from Sydney Harbour (collected by myself in 1884) ; from St. Vincent 

 Gulf, South Australia (S. W. Fulton) ; and from Tasmania and Bass Strait 

 (F.I.S. '" Endeavour ""). In all of these the males are of form 1. The 

 '' Endeavour " specimens are a little more slender than some of the others, 

 and rather more setose, bearing a few long scattered setae on the dorsal 

 surface of the peraeon and pleon. In the Sydney and New Zealand speci- 

 mens the setae on the dorsal are scanty and small. 



Elasmopus neglectus sp. now Figs. 7-l<>. 

 Male. — Third pleon segment with postero-lateral corner acutely pro- 

 duced ; fourth segment with a single dorsal carina, ending posteriorly in 



Fig. 7. — -Elasmopus neglectus, male. Terminal portion of pleon, with nropoda and telson. 



an acute point. Mandible with third joint of palp slender, its hind margin 

 slightly convex, front margin pectinate. First gnathopod with side-plate 

 produced anteriorly into a rounded lobe, the terminal joints densely setose 



