EAST COAST MARINE SHELLS 



23 



Family Ischnochltonldae 



GENUS ISCHNOCHITON Gray 1847 

 (SLENDER CHITONS) 



ISCHNOCHITON FLORIDANUS Pilsbry. Florida 

 slender Chiton. Shell elongated, narrow; 

 valves roughly arched, not keeled; whitish 

 or delicate green, mottled with olive or 

 gray; interior pink, blue, and white, or 

 rarely all white or rosy. Girdle delicate- 

 ly marbled with bluish and gray, clothed 

 with rounded scales. Length 41 mm. 



PI. 56, Fig. 5 



Southern Florida to Key West 



ISCHNOCHITON LIMACIFORMIS Sowerby. Shell 

 elongated and narrow elevated; buff, gray, 

 or greenish, occasionally blotched with 

 red; interior stained with bright pink and 

 blue-green; anterior valves with eleven 

 slits, central valves with one, posterior 

 valves nine silts; teeth sharp, eaves sol- 

 Id and grayish. Length 35 mm. 



Lives under stones at low water. 



PI. 56, Fig. 9 



Florida Keys; West Indies 



ISCHNOCHITON PAPILLOSUS C. B. Adams. 

 Pimpled Chiton. The smallest of the Flor- 

 ida or West Indian Ischnochitons. It is 

 uniformly granulated, the lateral areas 

 very indistinctly defined; shell wide, 

 greenish, closely spotted with whitish and 

 black; girdle finely scaly, alternately 

 greenish and white. Length 7 mm. 



Dredged by the writer off the 

 Florida west coast, clinging to shell frag- 

 ments, in about 2 fathoms and near Cape 

 Romano. 



PI. 56, Fig. 3 



Marco; No Name Key; Key West, 



Florida 



GENUS CHAETOPLEURA Shuttleworth 1853 



CHAETOPLEURA APICULATA Say. Bee Chiton. 

 Shell convex, subcarinated, grayish or 

 pale chestnut; three to four concentric 

 lines upon anterior valve and many ele- 

 vated distant dots arranged in regular 

 lines along edge; six following valves 

 with elevated point like beads which at- 

 tain greater height than the dorsal trian- 

 gles; posterior valve with dots similar to 

 dorsal triangles, a middle knob and the 



remainder with dots like those on anterior 

 valve. Length 1 inch. Range 3-12 fathoms. 



PI. 57, Fig. 6 



PI. 70, Fig. 10 



Vineyard Sound, Massachusetts to 



Florida 



GENUS CERATOZONA Dall 1882 



Valves strong, exposed; girdle 

 tough, bearing peculiar corneous spines 

 similar to itself and generally bimched at 

 sutures. 



CERATOZONA RUGOSA Sowerby. Wrinkled Chiton. 

 Shell oblong, back broadly arched; surface 

 green olive or slate on sides, central 

 areas whitish along middle; tail valve 

 with broad pink ray behind; interior blue- 

 green; girdle horny yellow, very tenacious, 

 wide, yellowish with long pointed spines, 

 most numerous around edge, slender flexible 

 beards scattered among spines. Length 40mm. 



PI. 57, Fig. 1 



PI. 56, Fig. 4 



Jupiter Inlet, East Florida to West 



Indies 



Family Chitonldae 



GENUS CHITON Linn€ 1758 

 (COAT OF MAIL SHELLS) 



CHITON TUBERCULATUS Linnfe. Swollen Chiton. 

 Color varying from light olive to dark 

 olive brown, sometimes unicolored but gen- 

 erally speckled on side areas and end 

 valves, often clouded on central areas; 

 some valves with dark stripe on the ridge. 

 Interior blue-green, very smooth; girdle 

 buff, white or light green, with patches of 

 blackish or dark green. Scales coarse, 

 convex, polished. Length 2.5-3.5 inches. 



PI. 56, Fig. 1 



Florida Keys to Texas; West Indies 



CHITON MARMORATUS Gmelin, Marbled Chiton. 

 Shell oval, rather high; surface smooth, 

 polished; color variable, usually greenish 

 or brown, with darker spots, streaks and 

 lines; interior blue-green, each valve of- 

 ten with darker posterior rays; anterior 

 valve with eleven to fourteen, central 

 valves one, posterior valve thirteen to 

 seventeen slits; eaves and slit-rays very 

 porous. Girdle touched with green and 



