312 Transactions. 



Size.- — From 49 mm. to 125 mm. 



//«&.— Streams in North Island, and northern and western part of South 

 Island, D'Urville, and Kapiti Islands. 



Paranephrops zealandicus (White). 



Astacus zealandicus White, Proc. Zool. Soc. London, pt. 15, p. 123, 

 1847. Paranephrops zealandicus Filhol, Institut de France, iii, 

 2nd part. No. 1, p. 429, 1885. P. neo-zelanicus Chilton (in part). 

 Trans. N.Z. Inst., vol. 21, p. 249, 1889. P. zealandicus Faxon. 

 Proc. U.S. Nat. Mus., vol. 20. p. 680, 1898 (with references) ; 

 Chilton, Trans. N.Z. Inst., vol. 32. p. 15, 1900. 



Cephalothorax cylindrical ; carapace nearly smooth in small specimens, 

 but in larger forms with rounded tubercles on the branchiostegite, along 

 the cervical groove, and on the gastric area ; a median carina runs over 

 the gastric area, ceasing abreast of the anterior of the post-orbital spines ; 

 rostrum one-eighth as long as the body, and more than half as broad as 

 long, slightly depressed, the edge thickened, with usually 5 small denticula- 

 tions on each side ; under-surface either unarmed or with 2 small spines. 

 No median keel on the upper surface of the rostrum. Basal scale of antenna 

 short and broad, tapering from half-way and projecting not quite as far 

 as the peduncle. Chelae shorter and broader than in P. planifrons ; propod 

 two and a half times as long as broad, hand provided with spines on outer 

 and inner margins, with rounded tubercles on the upper and lower surfaces, 

 hidden by dense tufts of fine silky hair, arranged in longitudinal rows ; 

 inner margin of propod has only one row of spines. 



Size. — 54 mm. to 130 mm. 



Rah. —Streams in South Canterbury, Otago, and Stewart Island. 



Paranephrops setosus Hutton. 



Paranephrops setosus Hutton, Ann. Mag. Nat. Hist., 4th ser., xii. 

 p. 402, 1873. Astacoides tridentatus Wood-Mason, Proc. Asiatic 

 Soc. Bengal, 1876, p. 4. A. zealandicus Wood-Mason, Ann. Mag. 

 Nat. Hist., 4th ser., xviii, p. 306, 1876; Filhol. Institut cle France, 

 iii. 2nd part, No. 1, p. 429. 1885. Paranephrops neo-zelanicus 

 Chilton (in part), Trans. N.Z. Inst,, vol. 21, pp. 246-49, pi. x, 

 figs, la, 2a, 1889. P. setosus Faxon, Proc. U.S. Nat. Mus.. vol. 20, 

 ]». 681, 1898 (with references) : Chilton, Trans. N.Z. Inst..' vol. 32, 

 p. 16, 1900. 



Carapace oval, bulging behind the cervical groove, armed with distinct, 

 forwardly directed, sharp spines along tin c< rvical groove, and on the 

 branchiostegite and gastric area, A median carina runs over the gastric 

 area, and is continued less distinctly over the rostrum. Rostrum one- 

 sixth of the total length of the body and twice as long as broad, depressed, 

 edges raised and armed with usually 4 sharp, forwardly directed spines 

 on each side, lower surface with a downwardly projecting median keel, 

 armed with 1 or 2 spines. Basal scale of antenna longer than in 

 P. zealandicus, tapering from the posterior third, projecting as far as or 

 Ivvond peduncle. Chelae of the same proportions as in P. zealandicus, 

 but with hairs less dense, and armed with prominent spines projecting 

 above the hairs, but otherwise with the same arrangement as P. zealandicus. 



Size.- — 35 mm. to 103 mm. 



Flab.- — Streams in North and Central Canterbury. 



