PSEUDOPEAS. 1 21 



gin dilated above. Length 9, diam. 2.75, aperture 2x1.25 

 mm. (P/V.). 



Sir Charles Hardy's Island, on the northeast coast of 

 Queensland (Tucker, type locality) ; also Fitzroy, Sunday 

 and Lizard Islands (Macgillivray), and other islands within 

 the Great Barrier reef and Torres Straits; mainland of 

 Queensland; Prony Bay, New Caledonia. 



Bulimus tuckeri PFR., P. Z. S., 1846, p. 30; Monogr., ii, p. 

 158 ; viii, 138. REEVE, Conch. Icon., v, pi. 68, f . 481. FORBES, 

 Voy. H. M. S. Rattlesnake, ii, p. 372 (N. E. coast Australia) . 

 -Cox, Monogr., Austr. Land Shells, p. 69, pi. 13, f. 9 (Bris- 

 bane to Cape York, Queensland ; Clarence Heads, N. S. Wales ; 

 introduced at Sydney) . PETTERD, Journ. de Conch., 1877, p. 

 361 (Emigrant Creek, sources of Tweed River and southern 

 Queensland). BRAZIER, Quart. Journ. of Conch., i, p. 272 

 (Is. of Torres Sts.). Stenogyra tuckeri TATE, Rep. Horn 

 Exped., Zool., p. 203 (Port Darwin). 



The shell tapers straightly to the obtuse summit. The 

 whorls are very convex just below the suture, and are sculp- 

 tured with very fine but distinct, almost thread-like striae, 

 which are almost vertical, but a little curved forward. The 

 first 1% whorls have only very faint spiral lines, less distinct 

 than in P. interioris, but of the same nature. The suture in 

 well-sculptured shells is irregularly crenate by reason of small 

 denticles formed by the coalescence of groups of striae; but 

 this appearance is often hardly noticeable, and some shells 

 seem to have an even suture. Instead of the usual round 

 white eggs, sexually mature shells contain minute, subglob- 

 ular young shells. Specimens measure as follows : 



Length 8.2, diam. 2.5, aperture 2.3 mm., whorls 71/2- 



Length 7.3, diam. 2.4 mm., whorls 6%. 



Length 7.6, diam. 2.2 mm., whorls 7%. 



While P. tuckeri is evidently related to P. interioris, yet it 

 certainly differs by the wider contour, larger mouth and 

 fewer whorls in specimens of the same length. The sculpture 

 of P. interioris is coarser. P. tuckeri has been confused by 

 all recent authors with the Polynesian Opeas junceum, a 

 species which I think differs generically. 



