2 Mr. G. M. Thomson on new Species of 



tail entire, toothed on each side, and with two strong teeth at 

 the apex. Lateral lamina? exceeding the central one ; the 

 inner narrow-lanceolate, acute, and furnished with long hairs 

 on each side ; the outer obtuse, with the apical half narrowing, 

 ciliated only at the extremity and on the inside, and with a 

 few stout teeth about the middle of its outer margin. Length 

 05 inch. 



Dunedin Harbour, in 4 fathoms. 



ISOPODA VAGANTIA. 



Fam. Tanaidae. 



Genus Paeatanais, Dana. 



Paratanais tenuis, n. sp. (PI. I. fig. 1.) 



Body slender. Head, when seen from above, narrowing 

 anteriorly, front margin nearly straight. Eyes triangular ; 

 peduncles so short as to be hardly visible. Superior antennas 

 stout ; inferior pair about two thirds as long as superior, 

 slender. First gnathopoda stout ; mobile finger smooth on 

 the inner margin ; immobile finger with a slightly convex 

 inner margin furnished with a few strong hairs, and termi- 

 nated by two or three stout denticles. Second gnathopoda 

 long and very slender. Two anterior pairs of pcreiopoda 

 comparatively slender, succeeding pairs stouter. Last seg- 

 ment of abdomen somewhat triangular, with a truncate apex, 

 terminated by two minute setce. Terminal uropoda with the 

 inner branch four-jointed, and more than half as long as abdo- 

 men ; outer branch one-jointed, as long as first joint of inner. 

 Length 0*1 inch. 



Dunedin Harbour, in 4-5 fathoms, and rock -pools on the 

 coast. 



Amphipoda Noemalia. 



Fam. Gammaridae. 



Subfam. Steqocephaliles. 



Genus Panoplcea, n. gen. 



Coxos of the four anterior segments well developed, those 

 of the second pair of pereiopoda excavated on the upper part 

 of the posterior margin. Antenna? subequal, without a secon- 

 dary appendage. Mandibles with an appendage. Maxillipeds 

 with a squamiform process on the ischium. Gnathopoda 

 feeble, almost chelate. Three posterior pairs of pleopoda 

 double-branched. Telson simple, squamiform. 



