THE WHITE CHITON. 



107 



Chcstopleiira Hartzvigii, Cpr., Ke-to-plu'-ra Hart- 

 wig'-i-i, is about the same size as the last species, 

 but the exterior is not polished, and is of a dull drab 

 or an olive green. The inside of the valves is 

 smooth, and of a lively, pea-green color; southern. 

 Fig. 93 shows us the appearance of a lean Chiton, 

 for that is signified by the first part of its long name, 

 Ischnochiton regularise Cpr., Ish-no-ki'- 

 ton reg-u-la'-ris. The last name signi- 

 fies, moreover, that it is of a very regu- 

 lar form, and this is true. Its width, 

 which is constant, is half its length, and 

 the ends are semi-circles. 



The valves are sharply arched, and 

 are marked with very fine sculpturing. 

 By the aid of a lens the mantle-border is 



seen to resemble fine Fl s-93- 

 bead-work. The color is dark olive- 

 green, and the length is an inch 

 and a half or less. 



Stenoradsia Magdalensis, Rve., 

 Sten-o-rad'-si-a Mag - da - len'- sis, 

 Fig. 94. 



This large and very common 

 Chiton may be found under rocks 

 at low tide, and may at once be 

 recognized by its worn or roughly 

 sculptured, low-arched valves, 

 which are white internally, and 

 of a light ash-gray color on the 

 outside. The hairless mantle- 

 border is of a similar neutral tint, 

 but the foot is yellow. When 

 taken from the rock it has a habit of curling itself up 



Fig. 94. 



