CLASS GASTROPODA 
261 
Shell oval, rather low, the dorsal ridge obtusely rounded; dull olive- 
green, generally having a pair of lighter stripes on the ridge of each valve 
with a black blotch outside of the light dashes. Girdle rather narrow, 
dense, microscopically closely granulated. The tail valve is convex as a 
whole, but the subcentral umbo is not conspicuous. The entire surface is 
very closely microscopically granulated and bears larger wart-like granules 
irregularly scattered over the minute sculpture, these warts being much 
more numerous upon the lateral areas (which are otherwise rather ill- 
defined) and the terminal valves. The interior is of an intense blue-green 
color. Sutural plates rounded, leaving a wide, angular sinus. Insertion 
plates shorter than the eaves, blunt, the anterior valve having the teeth 
bi- or tri-lobed, the posterior valve having them crenulated. Slits of an¬ 
terior valve 10-11; median valves 1; posterior valves 9-12. Eaves spongy. 
Gills extending forward to the front end of the foot. Length, 30; breadth, 
17 mm. Length, 27; breadth, 18 mm. (Tryon and Pilsbry, Manual of 
Conchotogy .) 
Type in Museum Cuming. Type locality, Monterey, California. 
Range. Forrester Island, Alaska, to Gulf of California. 
Described as Chiton hartwegii Carpenter. 
Lepidochitona hartwegii nuttalli Carpenter, 1855 
Proceedings, Zoological Society of London, 231. Tryon and Pilsbry, Manual of Con- 
chology, 14:46. 
C. t. Chitoni hartivegii simili, sed latiore, depressa (ad angulum 
130°), superficie granulis majoribus, maxime marginem versus; margini- 
bus quadratis, suturis nullis; intus valvarum marginibus valde arcuatis, 
sinu lato, alto. Long., 1.05; lat., .8; alt., .24 poll. (Carpenter.) 
Umbo flatter; valves broad, non-swelling, squared at the sides, and not 
beaked or waved. Posterior valve having 11, central 1, anterior 8 slits. 
(Tryon and Pilsbry, Manual of Conchology.) 
Type in Museum Nuttall. Type locality, Monterey, California. 
Range. Straits of Juan de Fuca to Turtle Bay, Lower California. 
Described as Chiton nuttalli Carpenter. 
Lepidochitona lowei Pilsbry, 1918 
Nautilus, 31:127. 
Oval, rather depressed, dirty buff, a little darker toward the beaks, 
which project somewhat. Surface of the valves finely, closely and evenly 
granose throughout, the granules oblong. The anterior valve and posterior 
areas of the posterior valve have a few very weak, low, radial impressions. 
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