CHITON.—Ptarte XI. 
Species 62. (Mus. Cuming.) 
Curron EmMErsonranus. Chit. testd ovati, valvis levibus, 
postice utringue rotundato-lobatis, utraque scutelld 
pared elevaté cordiformi, concentricé creberrimé gra- 
noso-striatd, medio notatd, valvd terminali antica super- 
ficialiter radiatim sulcatd, posticé parva, ad extremita- 
tem subeacavatd, retusd ; albd ; ligamento corneo, trans- 
lucido, marginem versus arenaceo, testum, nisi areas 
parvas centrales, obducto. 
Emerson’s Curton. Shell ovate, valves smooth, rotun- 
dately lobed posteriorly on each side, with a small 
raised heart-shaped shield in the centre, which is 
very closely concentrically granosely striated ; ante- 
rior terminal valve superficially radiately grooved, 
posterior small, slightly excavated at the extremity, 
blunt; white; ligament horny, transparent, arena- 
ceous towards the margin, spread over all the shell 
except the small central raised shields. 
Cournovy; Boston, Journ. Nat. Hist. vol. ii. p. 83. pl. 3. 
f. 10. 
Hab. Massachusetts Bay, United States (found in the 
stomachs of fishes) ; Gould. 
The ligament in this curious species is spread over the 
valves as far as the small heart-shaped shields in the centre, 
like a thin layer of parchment; it is closely allied to the 
C. amiculatus, of Northern Europe, but may be distin- 
guished by its broader growth, lighter colour, and absence 
of hair. 
