THE NAUTILUS. 87 



subspecifically. The name available for the West Atlan- 

 tic will be Lacuna vincta pertusa Conrad, Journ. Acad. 

 Nat. Sci. Phila., vol 6, p. 266, 1829. 



Figure 20, MENESTHO ALBULA Moller. The specimens re- 

 ferred to under this name are not that species, but 

 Couthouyella striatula Couthouy. 



Figure 21, VELUTINA LAEVIGATA Linnaeus, and Figure 23 

 LAMELLABIA PEBSPICUA Linnaeus I do not know. 



Figure 34, BUCCINUM UNDATUM Linnaeus. This species was 

 described from Europe. As at present conceived it is a 

 most variable form and will require intensive anatomic' 

 study and breeding to decide whether we are dealing 

 with a fluxed hybrid element, or whether this name is 

 made to cover a host of species. With the present state 

 of our knowledge it would be folly to attempt a differen- 

 tiation of the American from the European forms. 



Figure 39, TROPHON CLATHRATUS Linnaeus. The size, shape 

 and sculpture differentiate the American from the Euro- 

 pean form. The West Atlantic members will have to be 

 called Trophon scalariformis Gould, Invert. Mass., p. 

 378, 1870. 



Figure 44, ALEXIA MYOSOTIS Draparnaud. More detailed 

 anatomic study will have to be made before we can be 

 sure that the European species is really the same as the 

 American. 



A bit of rectification, where needed, of the rest of the) 

 nomenclature may not be out of place, and I am surd 

 that Professor Morse will be only too glad to have some- 

 one relieve him of this task, so we give the following : 



Figure 1, ENTALIS STRIOLATA Stimpson is now Dentalium 

 (Antalis) entale stimpsoni Henderson. 



Figure 11, TROCHUS OCCIDENTALIS Mighels & Adams. This 

 is Calliostoma occidentale Mighels & Adams. 



Figure 13, RISSOA MINUTA Totten is Paludestrina minuta 

 Totten. 



Figure 24, NATICA HEROS Say. 



Figure 25, NATICA TRISERIATA Say. 



