Distribution of Teinnocepluila cliilensi.s. 337 



which is always found living cctoparasitically on tlic bodies 

 of" f'rcslnvatcr crustaceans) ; but none of" them being still ad- 

 iierent to the intcgunient ot" their "chum," and it consequently 

 ai)j)earing to me just possible that they might have been 

 detached from some other animal previously received from 

 Chili in the same jar, I deemed it the wiser course to wait 

 for more conclusive evidence of so interesting a distributional 

 fact. 



I have since received from my friend ^\x. W. Guyes Brittan, 

 of Christchurch, Ncav Zealand, an abundant supply of each of 

 two species of crayfish, from tlie rivers Avon and Waimakiriri 

 respectively, two or three individuals of each of which have 

 great numbers of this Trematode still affixed to the smooth 

 intervals between the spines, both of the carapace and of the 

 chelipeds. The occurrence of Tcmnocepliala in New Zealand 

 is thus established. 



In their present shninken condition, the little creatures 

 closely resemble a split pea, with the tentacles projecting, 

 fringe-like, from a portion of the circumference, and range 

 from 1 to 4 or 5 millims. in diameter. 



Dr. E,. A. Phili])pi, wdio gives (in 'Archiv fiir Naturgesch.' 

 1870, vol. xxxvi. pp. 35—40, pi. i. figs. 1-6) some details of its 

 structure, states that he himself found it in Chili on a species 

 of JEglea^ and on no other river-prawn. Dr. C. Semper, who 

 met w4th it in the Philippines on various species of fresliwater 

 crabs, in an interesting and full account (in ' Zeitschr. fiir wiss. 

 Zool.' 1872, vol. xxi. pp. 307-310, pi. xxiii.) of its anatomical 

 structure, shows conclusively that its true position is amongst 

 the Trematodes, and not amongst the Leeches, as was supposed 

 by Blanchard and Moquin-Tandon. 



Calcutta, Marcli 5, 1875. 



P.S. — Since the above was wa-itten, I have received the 

 zoological collections made by Major Godwin-Austen during 

 the expedition against the Daflas (as certain of tlie w'ild 

 I^Iongoloid inhabitants of the north-east frontier of India are 

 called), and found a single specimen of Temnocephala chihnsis 

 in a bottle containing, besides numerous land animals of various 

 groups, two fishes, to one of which it had in all probability 

 been attached. 



Indian Museum, Calcutta, 

 March 19, 1875. 



