164 WORMS. TESTACEA. 53. Chiton. 



Marmora* Shell 8-valved, fmooth, elegantly varied with white and 

 tUi% blackilh, the middle valves greeniih within, 



Chemn % conch. 8, tab. 95, fig. 803 — 805,, 

 Chemn, chiton, tab. 1 , fig. 5 . 

 Knar. Virgn. 4. tab, 17, fig. 3, 4, 



2. 7-valved, Schrcrt. Lit't.% tab. \, fig, 3. 



Inhabits America ; variously marked with alternate blackifli and 

 white bands, (Ireaks, veins and fpots ; the border tumid, fca, 

 ly, with alternate whitifli Heel-blue and blackilh patches. 



Granuhtus*. Piceous ; above flat with numerous raifed dots difpofed iji 

 rows ; border broad, coriaceous^ fpinous, with Hternate 

 black and white patches. r 



Chemn. conch. 8, tab. 96, fg^qefy? %()\> 



Inhabits Ametica. Valves 8, rarely- 7. 



Piceu.o Shell 8-valved ; above fmooth, piceous, and varied with 

 white and black. 

 Chemn. conch. 8. tab. 96. fg, 807 — 810. 

 Chemn. chiton, tab. 2, fg. 6. and 6. a, b, 

 Inhabits American and Red Seas jj^refembles the laft. 

 Shell black in the middle within \ the fides greenifh ; back with 

 alternate black fpots, and whitifli fpots, bands and veins: 

 calves tarcly 7 or 6. 



Induii Shell 8-valved, whitifh-am, with a fcaly border: middle^ 



valves very finely punctured. 

 Inhabits America, Chemn, conch, 8, tab,g6, fig. 81 1* 



Minimis, Shell 8-valved, fmooth, black, and covered here and there? 

 with meal. 

 Chemn. conch. 8. tab. 96, fg. Si 4. 

 Inhabits the Norway Seas; very laiall, 



Cimfx, Shell 8-valved, carinate, diaphanous, banded: each of the 

 extreme valves very finely punctured. 

 Chemn. conch. 8. tab, 96. fig 815. 



Inhabits Acrvuay ; fmall : within whitjfh-afii ; with alternate 

 biackiih and paler bands, 



AUllus, Shell 8-valved, deep black, above convex with a yellowilh 

 fpot on each of the valvesl 

 Chemn. conch. 8. tab. 96, fg. 816. 

 Inhabits North Seas ; affixed to the Mytilus modiolus. 



