150 Transactions.— Zoology. 
Hab. Christchurch and Eyreton. In damp situations, under decaying 
leaves, etc. 
This species must, I suppose, have been introduced in some way from 
England, though there are difficulties in this belief, for I have found it 
abundantly at two places several miles apart, separated by rivers over 
which animals of this kind cannot easily cross, and, moreover, it does not 
appear to be widely distributed in England, for Bate and Westwood say 
(p. 461) :—“ We believe that this species has only hitherto been found in 
Mr. C. Spence Bate’s courtyard and cellar, and that of the neighbouring 
houses, at Plymouth, where it is tolerably abundant." 
I have, however, no doubt that my specimens cannot be distinguished 
specifically from Philongria rosea, and we must therefore await further in- 
formation before we can decide whether it has been introduced or not. 
EXPLANATION OF PLATE XVIII. 
Apseudes timaruvia. 
Fig. 1. Dorsal view x 14. 
2. Upper antenna x 34. p, the re TET process on the basal joint. a, sete and 
auditory cilium from one of the joints of flagellum, more highly magnified. 
3. Lower antenna x 60. 
4. Mandible 
5. Second us x 40. d 
6. Maxillipede x 60. a, last two joints seen full face. 
7. First gnathopod x 14. a, part of the same showing the shape of the fingers. 
8. Second gnathopod x 24 
9. Third thoracic leg x 19. a, end of the same x 40. 
10. Last (seventh) thoracic leg x 19. 
11. Pleopodum x 60 
Art. XI.—On some Points of Difference between the English Crayfish (Astacus 
fluviatilis) and a New Zealand one (Paranephrops setosus). By CHARLES 
Cumton, M.A. 
[Read before the Philosophical Institute of Canterbury, 6th July, 1882.) 
Plates XIX.-XXI. 
Tue following paper is an attempt to contrast the structure of the New 
Zealand crayfish, Paranephrops setosus, with that of the English one, Astacus 
fluviatilis, as it is deseribed by Professor Huxley in his recent book ** The 
Crayfish. 
In Miers’ “ Catalogue of the Stalk- and Sessile-eyed Crustacea of New 
Zealand ” three species of Paranephrops are described as belonging to New 
Zealand. These are P. planifrons, P. setosus, and P. zealandicus. Of these 
* International Scientific Series, vol. xxviii. 
