SPECIES OF THE MANTISSA. 
Very few of the shells mentioned in this work appear to have 
been described from specimens that belonged to our author. 
Probably the original types were to be found in the cabinets 
of Ziergovell and De Geer, which (as Murray, the pupil of 
Linneus, has informed us) ranked with our author’s and the 
Queen of Sweden’s as the four principal collections in the 
kingdom. It is not my intention, then, to devote the same 
labour to these species as to those described in the ‘ Systema,’ 
for I have not access to like materials for their elucidation. 
Lepas p1apEMA has been spoken of in my previous notes. 
LEPAS PALMIPES may possibly have been identical with the 
Balanus Patelliformis, for our author has recorded his posses- 
sion of an example, and no other Cirripede in his collection so 
well accords with the definition of palmipes as a specimen of it 
(Chemn. Conch. pl. 98, f. 839). 
Lrepas GALEATA. ‘This name has been attached by our 
author to Ellis’s drawing of the Conopeéa galeata in the 
‘Philosophical Transactions’ (vol. x. pl. 34, f. 19). 
SoLEN DIPHOS was once thought by Lamarck to be his 
Solen violaceus, which corresponds fairly enough with the 
description, if we may translate “ovali-recta” as “ elongated- 
oval.” There is a young example of the latter in the Linnean 
collection, but no record of the presence of diphos. 
CARDIUM LITHOCARDIUM, judging from the Linnean collec- 
tion, was apparently the fossil T’rigonia costata, var. elongata 
(Ene. Méth. Vers. pl. 238, f. 2). The Cardita avicularis (Ann. 
du Mus. ix. pl. 19, f. 6, a, b) has, also, been suggested as the 
representative. 
Venus Puerpera follows reticulata in the revised ‘ Systema.’ 
Neither of the very dissimilar figures referred to bears the least 
resemblance to the shell which has been universally accepted 
