398 Transactions. 



I have examined specimens of Jasus hiigelii from Auckland, and also 

 one specimen from Sunday Island, in the Kermadec Group, this being the 

 one mentioned by Dr. Chilton (1911a, p. 549). I have concluded that 

 J. tumidus (Kirk) is the same as J. hiigelii (Heller), which is thus the 

 second species of New Zealand marine crayfish. 



Genus Jasus T. Jeffrey Parser, 1883, 



1883. Jasus Parker, Nature, vol. 29, p. 190. 1884. Jasus Parker, 

 Trans. N.Z. Inst., vol. 16, p. 304. 1888. Palinosytus Bate, 

 " Challenger " Reports, Crustacea Macrura, vol. 24, p. ix. 

 1888. Palinostus Bate, " Challenger " Reports, Crustacea Ma- 

 crura, vol. 24, pp. ix, 85. 1891. Jasus Ortmann, Zool. Jahrb., 

 vol. 6, pp. 14, 16. 1893. {Palinosytus) Stebbing, " A History of 

 the Crustacea," p. 196. 1893. Jasus Stebbing, ibid., p. 197. 

 1897. Jasus Ortmann, " American Journal of Science," vol. 4, 

 p. 291. 1900. Jasus Stebbing, "Marine Investigations in South 

 Africa : Crustacea," pt. i, p. 30. 1902. Jasus Stebbing, ibid., 

 pt. ii, p. 38. 



The following is the generic diagnosis as given by Parker : " Stridu- 

 lating organ absent ; rostrum well developed, clasped by paired pedate 

 processes of the epimeral plates ; procephalic processes present ; coxocerites 

 imperfectly fused ; antennulary flagella short." 



The New Zealand species may be distinguished by the following key :— 



1. Rostrum much smaller than the supra-orbital spines ; tubercles on cara- 



pace each surrounded by a ring of small hairs . . . . . . ./. lalandii. 



2. Rostrum at least as large as supra-orbital spines ; no hairs on carapace J. hiigelii. 



Jasus lalandii (Milne-Edwards), 1837. Plate XXIX, fig. 3. 



1837. Palinurus lalandii Milne-Edwards, Hist. Nat. Crust., vol. 2, 

 p. 293. 1843. P. lalandii Krauss, Siidafrik Crust., p. 53. 

 1868. P. lalandii Heller, Reise der " Novara," Crustacea, p. 96. 



1875. P. edwardsii Hutton, Trans. N.Z. Inst., vol. 7, p. 279. 



1876. P. edwardsii? Miers, Cat. Stalk- and Sessile-eyed Crust, of 

 New Zealand, p. 74. 1882. P. edwardsii Haswell, Cat. Austrahan 

 Stalk- and Sessile-eyed Crust., p. 171. 1884. Jasus edwardsii, 

 Parker, Trans. N.Z. Inst., vol. 16, p. 304. 1887. Palinurus la- 

 landii McCoy, " Prodromus of the Zoology of Victoria," vol. ii, 

 dec. XV, p. 193, pi. 149 and 150. 1887. P. edwardsii, Parker, 

 Trans. N.Z. Inst., vol. 19, p. 194, pi. x, figs. 1, 2, 5, 6, 7, 8, 12. 

 1888. Palinostus lalandii, Bate, "Challenger" Reports, Crustacea 

 Macrura, vol. xxiv, p. 86. 1888. Palinurus lalandii McCoy, 

 " Prodromus of the Zoology of Victoria," vol. ii, dec. xvi, p. 222, 

 note. 1891. Jasus lalandii Ortmann, Zool. Jahrb., vol. 6, p. 16. 

 1902. J. lalandii Stebbing, " Marine Investigations in South Africa, 

 Crustacea," pt. ii, p. 38. 1911. J. edwardsii Chilton, " Records 

 of the Canterbury Museum," vol. i, p. 303. 



Diagnosis. 



Rostrum much smaller than the supra-orbital spines, depressed, and 

 rapidly narrowing anteriorly to the apex, which curves upwards ; clasping 

 processes from the epimeral plates curving round the rostrum, and meeting 

 or nearly meeting above it. 



