114 HALIOTIS. 



altered outside by the ravages of a boring sponge that the surface- 

 sculpture cannot be made out. 



H. CAPENSIS Dunker. PI. 50, figs. 6, 7, 8. 



Shell when adult very large, thick and heavy, oval, depressed, 

 convex, strongly angled, the left margin very high and perpendicu- 

 larly descending ; back reddish-brown, lighter at the margins, more 

 of a yellowish-red, with whitish streaks showing the places of former 

 peristomes. Sculpture peculiar and irregular ; in the young with 

 longitudinal lamellae which branch or bifurcate ; later transverse, 

 becoming thick ribs, cut by the lines of growth, curled and having 

 the appearance of locks of hair, and having the peculiarity of 

 changing their direction with each segment of growth, beginning 

 as longitudinal lamellae running parallel with the lines of growth, 

 becoming more and more oblique, until next to the lip-edge they 

 stand at right angles to the growth-lines. The striae being undulat- 

 ing, and the ribs equally so, they assume the appearance of locks. 

 Spire rather high, margined, convex, the part next to the whorl 

 above impressed except on the last whorl where it remains level. 

 The number of holes is uncertain ; they are on nodes ; 7 to 9 

 remain open. Inside umbilicated. Impression not distinctly 

 bounded, marked by little pearly prominences arranged somewhat 

 in spiral rows ; the nacre is a mingling of silvery- white, rose red 

 and green'hues. Columellar margin arcuate, broad, flat, somewhat 

 concave. Length 145, width 114, convexity 40 mill. 



Cape of Good Hope. 



H. midce in part, of authors. H. capensis DUNKER, in PHILIPPI, 

 Abbild. u. Beschreib. etc., Haliotis, t. 1, f. 4. WEINKAUFF in 

 Conchylien Cabinet, p. 23, t. 9, f. 1 ; t. 10, f. 1, 2. 



Agrees with H. midce in size and general form, but differs in 

 sculpture. I have not seen this form. The above description is 

 taken from that of Weinkauff. The young are similar to H. midce 

 in sculpture. 



H. SANGUINEA Han ley. PI. 18, fig. 6. 



Shell oblong-ovate, narrowed toward the anterior end', depressed, 

 the distance of apex from margin contained 7 or 8 times in the 

 length of shell; spiral striae, when visible, very indistinct but with 

 radiating, coarse, oblique folds ; perforations 7 to 9. 



The left margin is regularly arcuate, the right one straightened, 

 a little concave along the middle part of the outer lip ; it is solid but 



