G. M. Tuowsox.—New Zealand Crustacea. 281 
I would here desire to express my thanks to Professor Hutton for the 
great assistance he has given me, and particularly for handing over for my 
inspection the collection of Crustacea in the Otago Museum, poker with 
his own valuable notes and manuscript descriptions. 
Decapoda macroura. 
Sub-tribe Caridea. Fam. I. Crangonidae. 
Crangon, Fabricius. 
Internal antenne dilated at the base, the peduncle short, and terminated 
by two filaments. External maxillipeds pediform, the terminal joint obtuse 
and flattened. Anterior legs sub-didactyle, stronger and thicker than the 
others; the hand flattened, the moveable finger inflexed upon the hand, and 
meeting a rudimentary thumb; second and third pairs very slender, the 
second didactyle ; two last pairs shorter and thicker. Abdomen large and 
rounded, 
1. Crangon australis, Hutton, MS. Cat. Fig. A.1. 
Carapace with five longitudinal rows of spines, the outer with three from 
the base of the moveable plate, the next with five from the outer margin of 
the orbit, and the median with two. Moveable plate extending beyond the 
peduncle of the outer antenne. Inner antenne short, hardly passing the 
external maxillipeds. Anterior legs extending beyond the tip of the move- 
able plate; second pair about half the length of the first; the third much 
longer. Abdomen smooth, not keeled, suddenly contracted at the second 
and third segments from the end, posterior segment nearly cylindrical. 
Length 14 inches. Common. 
Cook Straits, Dunedin, and Stewart Island. (Allied to C. spinosus, of 
Britain). 
Palemon. 
Sub-genus Leander, Miers’ Cat., p. 85. 
2. Leander fluviatilis, nov. sp. Fig. A.2 
Palemon fluviatilis, Hutton, MS. Cat. 
Beak narrow, slender, nearly straight, with from nine to fifteen teeth 
on the upper margin, which are more or less separated into three groups, 
the posterior of which consists of two, or rarely three, situated behind the 
orbit ; the middle of four to six, in front of the orbit; and the anterior of 
three to six, much smaller and situated near the apex ; four to six teeth on 
the lower margin. Anterior margin of carapace with one spine, and another 
over the inner angle of the orbit. Anterior feet short, but rather stout, 
reaching to the end of the peduncle of the outer antenne# ; second pair very 
slender, longer, but not reaching to the tip of the EA plate. Length 
14 inch. 
Waikato River (Professor F, W. Hutton); Taieri River, and lagoons in 
Taieri plain, 
