Archet. — Occurrena in New Zealand of the '■'inns Scutigerella. 295 



number of the antennal segments alone would be a sufficient reason for 

 making a new species. Further, the secondary whorl of setae commences 

 at one-quarter of the length of the antennae in each case. 



Legs.— The last pair (fig. 6) with tarsus five times longer than deep. The 

 metatarsus with 5 or 6 and the tarsus with 7 spines on the outer dorsal row ; 

 the setae increase gradually a little in length from the base to the end of each 

 joint, but the longest setae are shorter than half the depth of the meta- 



Fig. 5.— 1st leg, left side ; 88. 

 Fig. 6. — Last leg, left side ; 75. 



tarsus. The first pair of legs (fig. 5) with the anterior claw (fig. 4) elongate, 

 moderately slender, and a little curved ; the other claw moderately slender 

 and a little more than half as long as the anterior one. 



Cerci with numerous short setae, of which the distal ones are not half 

 as long as the depth of the cerci. 



Hob. — South America, New Zealand, and Europe (? introduced). 



Locality of New Zealand specimen, Ben Lomond, Lake Wakatipu, Central 

 Otago. 



Length, 6 "25 mm. 



Art. XXXII. — The Fresh-water Crayfish of New Zealand. 



By Gilbert Archey, M.A., Assistant Curator, Canterbury Museum. 



[Read before the Canterbury Philosophical Institute, 2nd December, 1914.] 



Plate IV. 



In the following pages an account is given of the species and varieties of the 

 New Zealand fresh-water crayfish, and of their distribution. This subject 

 had previously been worked at, but had not been definitely settled, some 

 doubt existing as to whether the crayfish found in Canterbury and Otago 

 were to be considered as distinct species or only as varieties. 



This paper contains, first, a summary of the work hitherto published 

 on the subject ; this is followed by a description of the crayfish found in 

 the different parts of New Zealand, and an account of the distribution of 

 the species and varieties. Some notes on the habits and mode of life of the 

 crayfish are then given, diagnoses of the species, and a bibliography. 



