102 SPECIES OF THE SYSTEMA. 
only, to distinguish his own remarks from those of the great 
naturalist, whose collections he had purchased. 
Ostrea marta. 
The Pecten maximus of authors (Donovan, Brit. Shells, 
vol. i. pl. 49) is marked, both with name and numerals, for 
this shell in the Linnean cabinet. The species was early 
recognised from its synonymy and description, and appears to 
be identical in the ‘Systema, ‘Museum Ulrice’ and the 
‘Fauna Suecica.’ In the revised copy of the first-named work, 
the reference to Lister is corrected from 161 (there is no such 
shell-plate in the ‘ Historia,’ but 163 follows 160) to 163. In 
his son’s copy of the ‘Systema,’ “ Pen. Zool. iv. t. 59, f. 61— 
Regenf. t. 2, f. 19—Bonan. Rec. 2, t. 8—Bonan. Kirch. 2, t. 7” 
are likewise referred to. 
Ostrea Pacobxa, 
This shell was early and easily recognised, thanks to the 
description in the ‘Museum Ulrice’ and to the general cor- 
rectness of the synonymy. The reference to Regenfuss, how- 
ever, must be excepted, since his beautiful painting represents 
the preceding species, whose features do not answer to the 
described characteristics of O. Jacobea. 
A specimen of Pecten Jacobeus (Sowerby, Thes. Conch. 
vol. i. Pect. f. 107, 108, 158) still remains in the Linnean 
collection, and alone answers to the combined description 
and purified synonymy. ‘The name was apparently taken from 
Bonanni, who says it is known as “ Cappa di St. Giacomo.” 
Ostrvea tesa. 
The ‘Museum Ulrice’ was expressly referred to (prior to 
the publication of that work) upon the first appearance of this 
species in the earlier edition of the ‘Systema.’ Its type, or 
