228 MR. O. A. L. MORCH ON GENERA OF MOLLUSCA. [NoV. 11, 



Vertagus, Link (not Klein), is Terehra, Brug. 



Aluco, Link, 'is Tympanotonos and Cerithium. 

 A.fuscus, Link, Chemn. iv. f. 1475. 

 A. auritus, L. 

 A. aculeatus, L. 

 A. nodula, L. 



Tivela, Link, p. 152; T. vulgaris, Link (Femes coi'hicula, Born. 

 Gm.), and T. trlpla, L. This name, therefore, has priority over 

 Trigona, Megerle. 



Musculium, Link, p. 152. " Sumpferschale. Die Schalen gleicli, 

 rund, schliessen iiberall. Das Schloss mit zwei kleinen Zahnen, 

 obne Seitenziihne ; Vorder- und Hiuterspalte ziemUch gleich ; das 

 Band auswendig." 



M. laciistre {Tellind), Gra. p. 3242; Ch. vi. f. 13. f. 135. 

 Herrmannsen erroneously refers this genus to Pisidiiim, Pfr. From 

 the figure of Chemnitz quoted, there cannot be any doubt that 

 Cyelas calyculata is the type. The expression, " nearly equila- 

 teral," excludes the genus Pisidium. "No lateral teeth" does not 

 agree with any European freshwater shell, and is very likely a 

 misprint. 



Musculium must be retained as a subgenus of SphcBrium, Scopoli. 



Niceulana, Link, p. 155. " Meernuss. Die Schalen gleich, schlies- 

 sen iiberall. Eine Reihe von kleinen spitzigen Zahnen an der 

 Vorderseite der Schalen neben den Spitzen. Nucula, Lam." 



Nuculana rostrata, Gm. p. 3308; Ch. vii. f. 550, 551. The 

 author only seems to have noticed the teeth on one side of the 

 iimbones. Notwithstanding this, the genus must be regarded as 

 established, and take priority over Leda, Schum. 



XInionium, Link, p. 155, is Avicula, as Deshayes has restored it. 

 Anodonta, Link, p. 156, is Loripes, Poll, founded on Venus edentula, 

 Gm. p. 3286 ; Ch. vii. f. 410, 411 =^. alha, Link. 



Peetinium, Link, p. 156, corresponds to Pecten of authors. 



Limaria, Link, p. 157, is Badula, Klein. 



L. vulgaris, lAnk=Osirea lima, Chemn. vii. f. 651. 



Sellana, Link, p. 158, is the bent form of Placiina, and is synony- 

 mous with Ephippium, Bolt. 



Atractilites, Link, p. 9. " Eine spindelforraige inwendigstrahlig 

 krystallinische Schale, ohne Alveole." 



A. belemniticus appears to be Belemnites listeri. 



Siphonium, Link. "Eine gerade Schale mit Scheidewiinden welche 

 ausserhalb Binge bilden. Hierher gehciren die geraden Nautili." 

 S. fascia. Very similar to Nautilus fascia, but larger. 



