Goyen. — New Species of New Zealand Aranese. 133 



Some species of fish are very local in their habitat, as shown 

 by the fact that species are found in certain places round some 

 of the Mokohinou Islands, whilst, so far as I have been able 

 to discover, absent from others ; the nature of the bottom, 

 whether it affords suitable food and hiding-places, being no doubt 

 a great factor in the distribution of species. One species, for 

 instance, known to the Barrier Natives by the name of koro- 

 koro punamu, is only found in two of the islands, in places 

 where overlapping boulders abound, or rocky overhanging reefs 

 occur ; the depth, however, is of no importance, for though this 

 fish reaches a considerable size (upwards of 2 feet), I have in 

 such places seen as many as thirty or forty in a hole, cut off from 

 access to the sea at low water. It feeds upon the small green 

 Alg£e so common between tide-marks. It is a very shy fish, and 

 will very rarely bite in the open water— that is, where it can be 

 seen. As a food fish it ranks far before the maomao (Ditrema 

 violacea), a fact which is quite - recognised by the Natives, who 

 inform me that they have never seen it elsewhere, excepting on 

 one occasion when one was found at the Great Barrier Island. 

 Although not a fish, it may not be out of place if I mention 

 that crayfish (Palinurus edwardsii) are very abundant here. 

 During the spawning season (from middle of May to the end of 

 July) large numbers visit shallow water in rocky sheltered places, 

 and the males (which do not cast their shell at the same time as 

 the females) may be easily caught or speared. It is perhaps un- 

 necessary to say that the casting of the shell, in the case of the 

 females, immediately precedes the spawning. 



Aet. XX. — Descriptions of new Species of New Zealand Araneas. 



By P. Goyen. 



[Bead before the Otago Institute, 8th November, 1887.] 



§ CITIGEADJE. 



Fam. Lycosoid^;. 



Genus Dolomedes, Latr. 



Dolomedes aguaticus, sp. nov. 



Female. — Length, 18 mm.; length of cephalothorax, 8 mm. 

 Legs 4, 2, 1, 3 (1 and 2 being almost equal) = 26, 22, 22 (about), 

 21 mm. 



Cephalothorax chocolate brown, with a supra-marginal band 

 of yellow extending from the posterior slope to the anterior angle 

 of the pars cephalica : falces, maxillse, labium, and sternum, 



