702 PROF. c. CHILTON ON CRUSTACEA [June 19,. 



5. Note on some Crustacea from the Freshwater Lakes of 

 New Zealand. By Chaeles Chilton, M.A., D.Sc.^ 

 F.L.S., Professor of Biology, Canterbury College, New 



Zealand. 



[Received May 18, 1906.J 



Dr. G. S. Brady has been good enough to submit to me the 

 few Amphipoda and other higher Crustacea collected by Messrs. 

 Lucas and Hodgkin during their recent investigation of the 

 principal lakes of New Zealand*. The first specimens reached 

 me in November 1905 and were at once reported upon; a few 

 additional specimens were received in March 1906, and an examina- 

 tion of these has necessitated some alteration of the general 

 remarks at first made. It will be seen from the following list that 

 the collections of the higher Crustacea were rather meagre and 

 that all the specimens secured belong to species already known. 



For many years I have looked forward to making collections 

 from the freshwater lakes of New Zealand in the hope of finding 

 there Crustacea allied to the blind forms inhabiting the under- 

 ground waters of the Canterbury Plains, just as forms closely allied 

 to European subterranean species are found in the deep waters 

 of the Swiss Lakes. The Crustacea first sent me by Dr. Brady 

 were, however, disappointing from this point of view, but among 

 those lately received there are two specimens of the blind species 

 Parcde]ytampliopus subterraneiis (Chilton), one specimen from 

 Lake Wakatipu (depth not stated) in the South Island, and the 

 other from Lake Taupo in the North Island, taken at a depth of 

 700 feet. This species is widely distributed in the underground 

 waters of the Canterbuiy Plains, and has also been found in 

 surface streams at Castle Hill in Canterbury and in the Longwood 

 Range in Southland, and its occurrence in the two lakes named 

 still further widens its area of distribution. It is closely allied to 

 Paraleptamjjhopus cceruleus (G. M. Thomson), first described from 

 a small stream at the top of the Old Man Range in Otago, at a 

 height of about 3000 feet, but since found to be, like its under- 

 ground representative, more widely distributed. 



The next most interesting species is the little Isopod that I 

 have identified as Paranthura oiigro-jmnctatcc (Lucas). Though 

 a surface form it is of particular interest, since it is the only 

 known freshwater species of the Anthuridte, and thus helps to 

 throw some light on the origin of the subterranean species 

 Cruregens fo7itam(,s, which belongs to the same family. Taken in 

 connection with the recent discovery of a Caprellid in the Lake 

 of Geneva, the occurrence of this Anthurid in freshwater leads us 

 to hope that other unexpected finds may be looked for on a 

 further examination of the lakes. 



Two other species, Tenagomysis novce-zealandice and Para- 



* " A Batliymetrical Survey of the Lalves of New Zealand," by Keith Lucas. 

 Geographical Journal, May & June 1904. 



