EEPOET ON THE GASTEEOrODA. 131 



is flat, brown, lineated, with one large and very many minute whorls. H. 0'82 in. B. TO, 

 least 0-81. Penultimate whorl, 0-22. Mouth, height 0'36, breadth 0-39. 



Perhaps Turbo (Calcar) armatum, Phil., most closely resembles this species, which is, however, very 

 distinct and much more beautiful. Strictly speaking, it belongs to none of the Calcar or Astralium 

 groups, but touches several of these. The operculum is unlike that of Stella, of Uvanilla, or of 

 Pomaulax. The form of the shell is unlike Pachypoma, and neither shell nor operculum suit Litho- 

 poma, Impcrator, Tubicanthvs, &c. 



8. Turbo (Uvanilla) tentoriiformis (Jonas). 



Trochus tentoriiformis, Jonas in Menke's Zeitschr. f. Malak., 1845, p. 66. 



„ fimbriatus, var. Quoy and Gaimard, "Astrolabe" (Zool.), vol. iii. p. 229, pi. lxi. fig. 9 (but 

 not the other figures). 



„ tentoriiformis, Philippi in Conch. Cab. (ed. Kiister), p. 116, sp. 132, pi. xx. fig. 1. 



,, Urvillei, Philippi in Conch. Cab. (ed. Kiister), p. 215, sp. 267, pi. xxxii. fig. 4. 



,, tentoriiformis, Eeeve, Conch. Icon., vol. xiii. pi. viii. fig. 43. 



„ Urvillei, Eeeve, Conch. Icon., vol. xiii. pi. viii. fig. 46. 

 Uvanilla tentoriiformis, Angas, Port Jackson Moll., Proc. Zool. Soc. Lond, 1867, p. 214, No. 173. 

 Calcar tentoriiforme, Fischer in Kiener's Iconog. Gen. Trochus, p. 41, sp. 29, pi. xxxi. fig. 2, and 

 pi. Ixxix. fig. 2. 



April 17-18, 1874. Port Jackson, Sydney. 2 to 10 fathoms. 



Habitat. — Port Jackson (Angas). 



The operculum in this species does not agree with Adams' figure and Gray's description not 

 having " distinct convex radiating ribs," but only two slight ridges nearly at right angles, the rest of 

 the surface being almost flat. Gray further describes his genus Uvanilla as having "marginal 

 spines," a feature which Adams softens into " whorls . . . fimbriated." They are neither in this case. 



9. Turbo {Bolina l ) la'piUus, Eeeve. 



Trochus lapillus, Eeeve, Conch. Icon., vol. xiii. p. xi. fig. 65. 

 July 29, 1874. — Levuka, Fiji. 12 fathoms. 



Habitat.—" ? "—Eeeve. 



There are two specimens of this species in the British Museum, which differ from one another in 

 the number of spirals on the base, and have only a faint tinge of purple at the pillar. In the two 

 Challenger specimens, the scaly spirals are much fewer, and a brilliant crimson streak to the left 



1 Eisso's name is here given as he spells it. Gray's reference to it would have been unrecognisable under the 

 form " Bolma " he adopted, had he not expressly referred to Eisso in the List of the Genera of Eecent Mollusca, 

 &c, Proc. Zool. Soc. Lond, 1S47, p. 144. See also Gray's Figs, of Moll., vol. iv. p. 144, No. 115. 



