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3. Aeanthoehites cornutus, «. sp. PI. 6, fig. 3. 



General Appearance. — Shell elongated, narrow, decidedly 

 carinatod, side slopes very slightly curved. Colour light-yellowish- 

 brown, mottled with white. Dorsal area whitish-brown. 



Anterior Valve. — Radially ribbed with five ribs, the whole area 

 being closely packed with bead-like granules. 



Posterior Valve. — Very diminutive. Macro post-median. Yalve 

 divided into dorsal and pleural area. Dorsal similar to same area 

 in median valves. Pleural area covered with concentric rows of 

 bead-like granules. The deep sulcatioiis of the dorsal area are 

 present on anterior margin to the outer edge of valve. 



Median Valves. — Lateral area much raised, and thickly 

 studded with imbricating granules. Pleural areas decorated with 

 eight to ten longitudinal rows of distinctly raised pustules, con- 

 siderably larger than the granules of the lateral area. 



Dorsal Area. — Triangular, microscopically pinnatifid, which 

 appearance is caused by three or more deep sulcatioiis, continued 

 into the pleural areas. 



Girdle. — Narrow, having on each side se\en sutural horny 

 protuberances, covered with microscopic glossy granules. Whole 

 girdle clothed with closely-packed microscopic imbricating semi- 

 transparent scales. General colour yellowish, with splashes of 

 brown. 



Measurement. — Dried specimen : Width, 3 mm.; length, 8 mm. 



Habitat. — Marino, South Australia ; low tide. Discovered by 

 E. Ashby. Only one specimen (not dissected). 



Remarks. — The horny protuberances, absence of spicules, and 

 transparent, closely-packed scales make this a very distinct 

 species. 



4. Aeanthoehites Vereonis, ??. *;?. Pi. 7, fig. 4. 



General Apj-earance. — Shell distinctly elongated carinated. 

 Exposed portion of valves one-third total width in live specimen. 

 Valves elevated. Posterior margin concave, prominently beaked. 



Colour of valves, pearly white, distinctly mottled with pink 

 deepening to rose-pink at posterior margin. 



Anterior Valve. — Clothed with somewhat flattened pustules, 

 separated, oval, very distinct, smaller towards the apex, and 

 arranged alternately. Teeth, five slits, with rays leading to 

 apex. 



Posterior Valve. — Mucro central, covered with flattened pustules 

 rather longer and flatter than anterior valve. Dorsal area 

 distinct, and smooth. Sinus wide. Eight slits at irregular 

 distances. 



Median Valve. — Pleural area covered with ten to eleven 

 diagonal rows of squamose pustules. Dorsal area raised, striated 



