264 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
spongy flat sinus which interrupts the sutural laminae. (Tryon, Structural 
and Systematic Conchology.) 
Type. C. scabra Reeve. 
Distribution. Mediterranean, Japanese seas, coast of California. 
Nuttallina californica Reeve, 1847 
Conchologia Iconica, Chiton; PI. 16, fig. 89. Tryon and Pilsbry, Manual of Con¬ 
chology, 14:279; PI. 54, figs. 23, 24, and PI. 56, figs. 12-18. 
Chit, testa oblongo-ovata, valvis medio subrostratis, undique subtilis- 
sime corrugato-crenulatis, terminalibus caeterarum areisque lateralibus 
laticostatis; fusco-viridi, ligamento corneo, pilis setisque dense obsito. 
Shell oblong, ovate, valves somewhat beaked in the middle, very finely 
corrugately granulated throughout, terminal valves and lateral areas of the 
rest broad-ribbed; brownish green, ligament horny, thickly beset with hairs 
and bristles. (Reeve.) 
Type in Museum Cuming. Type locality, California. 
Range. Straits of Juan de Fuca to San Diego, California. 
Described as Chiton californicus Reeve. 
Nuttallina fluxa Carpenter, 1864 
(New name for N. scabra Reeve) 
Supplementary Report, British Association for the Advancement of Science, 649. 
Tryon and Pilsbry, Manual of Conchology, 14:280; PI. 54, figs. 21, 22, and PI. 56, 
figs. 19, 20. 
Green, mottled with orange-red; not beaked; with only marginal and 
diagonal ribs. (Carpenter.) 
Shell similar to N. californica , but having the individual valves very 
much shorter in proportion to their width; the outer layer of the median 
valves produced at the sides anteriorly, curving broadly forward and 
laterally upon the sutural plates; the median ridge and sulci more or less 
obsolete. Tail valve shorter, with less posterior mucro. Color of valves 
lighter, more variegated. Girdle rusty brown or alternately blackish and 
white; bearing rather sparsely scattered, white, spike-like spines, some¬ 
times having one or two at each suture. Length, 29; breadth, 13 mm. 
(This is Pilsbry’s description of N. scabra Reeve, in Manual of Con- 
chology, 14.) 
This species has hitherto been confused with the preceding ( N . cali¬ 
fornica Reeve) by most collectors. Carpenter, however, distinguished it and 
gave the name fluxa. Although the individual valves are much shorter 
in this species than in N. californica s they overlap much less, so that the 
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