140 



longitudinal, closely packed granulose riblets. The granules in- 

 crease in definition towards the marg^in of the pleural area, 

 where they will be more correctly described as longitudinal rows 

 of granules. 



Pleural Area. — In this area the rows of granules are radial, 

 the rows being separated, widely apart, and very regular. In this 

 area the granules become large, digitate, in some^cases pointed, 

 inclined very much forward, the apex of one just reaching to the 

 base of the one in front of it. Where the apex is broken off the 

 pustules are seen to be hollow. 



Lateral Area. — Raised or recurved, clearly defined, the pustules 

 being rounded and granulose, becoming crowded and irregularly 

 placed as they approach the posterior margin of valve. 



Inside. — The articulamentum was probably white. The inser- 

 tion plates are well produced, though in the specimens under 

 examination rather broken, and apparently unslit. The upper 

 surface of the sutural laminae is irregularly grooved, sinus broad. 



Measurement. — Width of valve, 7 mm.; length of valve, 7 mm.; 

 length of slope, 5 mm ; divergence, 100°. 



Locality. — Schnapper Point. 



7. Aeanthoehites rostratus, n. «/?. PI. iv., fig. 5. 



One median valve. 



General Appearance . — Carinated, side slope straight, strongly 

 beaked. Color porcelain white. 



Dorsal Area. — Wedge shape, much raised, convex, strongly 

 beaked, the beak bent downwards This area is smooth and 

 glossy under an ordinary pocket lense, but under a fairly high 

 power it is seen to be pitted with irregular shallow pitting, 

 highly polished. 



Lateral and Pleural Areas. — These areas are hardly separable. 

 The shell is a little thickened, and the sculpture a little coarser 

 in the lateral area. The ornamentation consists of a number of 

 somewhat irregular longitudinal rows of finger-shaped flattened 

 pustules. The pustules are set diagonally in the rows, and 

 increase to double the size as they reach the margin of the shell. 

 The posterior margin of valve is bent downwards. 



Measurement. — Longitudinally, 3 lura.; breadth, 5 mm.; diver- 

 gence, 105°. 



Innide, — White, insertion plates and sutural laminae not large, 

 sinus broad and shallow, only indicated by a slight sinuosity of 

 outline. 



Locality. — Schnapper Point. 



8. Chiton fossieius, n. sp. Pi. iv., fig. 4. 

 One example median valve. 



General Appearance. — Valve narrow, carinated, side slopes 

 nearly straight. Color pale olivacious buff. 



