PLATE XxXV. 
Pic. tI 
MYTILUS DISCORS. 
DIVIDED MUSCLE. 
GENERIC CHARACTER, 
The hinge toothlefs, and consits of a longitudinal furrow. 
SPECIFIC CHARACTER. 
AND 
SYNONYMS. 
Shell oval, somewhat diaphanous and horny. Outside divided into 
three compartments ; the two exterior striated longitudinally ; the 
middle transversely, with extremely fine striz. 
MytTILtus Discors: testa ovali cornea subdiaphana, antice lon- 
gitudinaliter posterius transversaliter striata.— 
Gmel. Linn. Syst. Nat. Conch. p. 3356. 
sp. 21. 
Mytillus minor tenuis areis tribus distinctus. Discors. Da Costa, 
Br. Conch. p. 221. sp. 51. 
The discovery of this rare species on our coast, is ascribed by 
Da Costa to Dr. Richard Pultney, F.R.S. of Blandford in Dorfet- 
shire ; he found it on an ascidta at Weymouth in that county. It 
