36 SPECIES OF THE SYSTEMA. 
Gellina albtva. 
Our author has neither signified his possession of this doubt- 
ful species, nor added anything to his published account. Duill- 
wyn, who derived his information from the MSS. of Solander 
(whose synonyms correspond to those in the copy of the 
‘Systema’ that belonged to the younger Linneus), surmises 
that the Psammobia vespertina was the species intended. The 
“sutura ante et post cardinem notata lineis transversis rufis ”’ 
forbids this determination; neither, indeed, can I find that pe- 
culiarity present in any of the shells devoid of lateral teeth, 
yet furnished with prominent nymphe (as this is expressly 
stated to be), save in Psam. Tellinella, a close ally of vespertina, 
of which at that period there was no figure in existence, and in 
Sanguinolaria occidens. The former, although it so exactly 
corresponds to the description and locality in the ‘Systema’ 
that I scarcely doubt its identity, is most assuredly not the large 
species of the ‘Museum Ulrice’ said to be “ magnitudine 
ovi:” the true locality of the latter is not merely contrary to 
that stated, but the ‘‘ cardo utrinque ex dentibus tribus” (M. U.) 
forbids even the generic allocation. 
No author appears to have yet succeeded in recognising, even 
to his own satisfaction, the species in question (one might have 
believed there had been two, had not the tenth edition of the 
‘Systema’ referred to the unpublished ‘ Museum’); neither, 
indeed, have I, but the type still preserved in Sweden may 
solve the problem hereafter. 
Gellina foltacea. 
Our author did not possess this species, which has long been 
identified (Tellina foliacea, Hanley in Sow. Thesaur. Conch. 
vol. i. pl. 64, f. 253) through the cited figures and the ample 
details of the ‘Museum Ulrice. 
