102 HALIOTIS. 



Var. NEBULATA Reeve. PL 46, fig. 1. 



Shell oblong-ovate, convex, spire rather elevated, spirally grooved, 

 grooves small, waved, perforations rather approximated, 7 open ; 

 clouded throughout with brown and red. (Reeve.) 



H. nebulata REEVE, Conch. Icon., f. 49. 



This variety forms a transition to If. revelata Desh. 



H. REVELATA Deshayes. PI. 15, figs. 81, 82. 



Shell ovate-oblong, depressed, a little convex above, broadly open 

 beneath ; whorls 3, the last large, obsoletely longitudinally sulcated, 

 having 7 narrow perforations ; brown marbled with white and green, 

 vividly pearly inside, columella flat, subtruncated below. (Desh.) 



Length 61, breadth 37, convexity 15 mill. 



Island of Bourbon (Reunion) ; Mauritius. 



H. revelata DESH, Moll, de Tile de la Reunion, p. 70, t. 9, f. 1, 2. 

 MARTENS in Mobius Reise n. Mauritius, p. 298. 



This is an extreme form of the series of pustulata and nebulata. 

 It is smoother than the other forms, and the apex is more terminal. 



H. ZEALANDICA Reeve. PI. 3, fig. 5. 



Shell oblong, rather depressed, spirally irregularly grooved, inter- 

 mediate ridges obtuse, now broad, now narrow ; 6 holes open ; ex- 

 terior peculiarly marbled with reddish-chestnut and red-tinged 

 white. (Reeve.) 



New Zealand (f) 



H. zealandica REEVE, Conch. Icon., f. 64, 1846. HUTTON, 

 Manual of New Zealand Mollusca, 1880, p. 105. N. novce zeelandice 

 Reeve, MARTENS, Critical List. Moll. N. Z. 1873. p. 34. 



This is a form very similar to certain varieties of H. pustulata or 

 nebulata, but is narrower with more terminal apex. 



It may also be compared with stomaticeformis. 



H. RUGOSA Reeve. PI. 12, fig. 64. 



Shell ovate, convex, slightly depressed in the middle, radiately 

 plicately wrinkled, spirally ridged, ridges obtuse, here and there 

 larger ; perforations rather large, 4 open ; exterior marbled with 

 olive-brown and green. The ridges of this species are somewhat ir- 

 regular near the apex, but in the middle they are arranged alter- 

 nately one broad and three narrow. (Reeve.) 



Habitat unknown. 



