VENUS. 67 
paper, on which this name is written, in the Linnean collection. 
This locality was the original and sole one mentioned in the 
tenth edition of the ‘Systema’; the allied Swedish form 
(striatula) and the implied Asiatic one having been annexed to 
the species at a subsequent period. Bonanni’s figure, which 
represents V. Chione (whose margin is not crenated) is rightly 
expunged from the synonymy in the copy of the younger 
Linné. 
Venus petulea. 
Any attempt to recognise this shell, whose remarkably short 
description was not further illustrated by a pictorial or indirect 
definition, must have proved conjectural. The original descrip- 
tion in the tenth edition appeared unaltered in the final one ; 
in the former our author has indicated his possession of it; in 
the latter he has omitted it from his list. No shell is marked 
for it in his collection, where too many equally approach its 
declared features to permit of a decided appropriation of the 
name to any individual. The specific epithet petulca (sportive, 
gamesome, butting like a goat) is not suggestive. It is for 
the advantage of science to omit the species from future 
catalogues. 
Pens flexuosa. 
I can find but a single shell in the whole Linnean collection 
that posesses the required characteristics of this species; and 
as our author has announced his possession of an example, and 
the specimen so exactly corresponds with the language of the 
‘Systema,’ that one can scarcely avoid believing that it was the 
original one described, no reasonable doubt can be entertained 
of its typical authority. The individual has been delineated 
(pl. 4, f. 1) in the present work, as I cannot readily discover an 
exact portraiture of it: perhaps the nearest approach to its 
features may be found in the drawing in the ‘ Encyclopédie 
Méthodique,’ Vers, pl. 267, f.1. Linneus, who laboured undgr 
a similar difficulty, has referred us to Rumphius (42, not 438 as 
