Boone, Mollusca, Cruises of "Ara" and "Alva" 297 



Class: GASTROPODA 



Order: PROSOBRANCHIATA 



Superfamily: ZYGOBRANCHIA 



Family: HALIOTIDAE 



Genus: HALIOTIS Linne, s. s. Lamarck 



Haliotis naevosa Martyn 



■f 



Plate 113 



Type : Martyn's exquisite figures of this species were made 

 from a shell collected, New South Wales, between 1765 and 1780. 



Distribution : This species is known from New Holland or 

 Australia, also listed in the early records from Van Dieman's 

 Land; New Zealand and more recently from Bali (Boone), this 

 "Alva" record apparently being the first from Bali. 



Material examined: One young specimen, taken on coral, 

 Temukus Roads, Bali, Dutch East Indies, October 25, 1931. 



The Bali specimen is quite young, having a long diameter of 

 only 20 millimeters, as compared with one of 98 millimeters re- 

 corded by Martini and Chemnitz. Dorsally the present shell is 

 scarlet to a clay-red marbled with a conspicuous design of radi- 

 ating irregular zigzag lines of a deep chestnut brown mingled with 

 tones of olivaceous red. The interior surface is a silvery pearl 

 exquisitely iridescent with green and rose. 



The shell is moderately elevated, with about two- and three- 

 quarter whorls, apex small, prominent, the apertures about 

 twenty-nine, of which seven remain open; the dorsal margin of 

 these being elevated, thin. Outside of the apertures the usual 

 sulcus is present. The dorsal surface is spirally lirate, the lira- 

 tions being four major ridges inside of the outer row of holes 

 and of three major ridges outside of this outer row of holes. These 

 ridges have the appearance of rope-coil, being formed of granules 

 close-set but interrupted by the radiating transverse, fine incre- 

 mental lines. At intervals the granules composing the ridges are 

 enlarged, forming coarser nodules. The spire is situated well for- 

 ward with subvertical lines. The interior of the shell is silvery- 

 pearly iridescent with green-rose-lavender. 



