24 SPECIES OF THE SYSTEMA. 
might the younger Linné, after the synonymy in his own copy 
of the ‘Systema,’ write “ Forte in plures species dividende, 
saltem varietates forma et colore diversissime.” 
Hepas auvita, 
As Darwin has observed, there is no reason to doubt the 
identity of this Cirripede with his Conchoderma aurita, although 
the expression “ octovalvi” is most inaccurate. All the authors 
cited exhibit an Otion (Conchoderma), and apparently that 
species. Linneeus did not possess it, and has added nothing 
to his published account. 
PHO AS: 
In the generic description, our author had proposed to sub- 
stitute “ margo posticus recurvatus” for “ cardo recurvatus.” 
Pholas Dactylus. 
Pholas dactylus of authors (Wood, Gen. Conch. pl. 13, 
f. 1, 2, 3) confirms by its presence the established identifi- 
cation, and alone agrees with the mass of synonyms. Seba, 
as usual, is wrongly quoted: his figure represents crispata. 
In quoting Argenville, the letter M, not K, should have been 
referred to. 
Pholas costatus. 
The established identification of this fine looking Pholas 
(P. costatus, Sow. Thesaur. Conch. vol. ii. pl. 102, f. 8, 9) is 
corroborated by a manuscript reference to “ List. t. 434” in 
