NO. 2238. NOMENCLATURE OF THE FAMILY TURNITIDAE—DALL. 319 



Genus BATHYTOMA Harris and Burrows, 1891. 



Dolichotoma Bellardi, 1875 {Doligotoma Weinkaiiflf, 1876), is pre- 

 occupied by Dolichotoma Hope, 1839. The type is Pleurotoma catd- 

 phracta Brocchi, which automatically becomes the type of Bathy- 

 iorrm. This species is more or less sculptured. Casey proposed in 

 1904 the name of Megasurcula for the smoother West American 

 species. But von Koenen in 1867^ proposed for the Pleurotortia 

 flosa of Lamarck the name Gryptoconus; and a comparison of it 

 with the smaller Californian species {steamsiana Raymond) shows 

 only specific differences between them. Cryptoconus thus supersedes 

 Bathytoma for the West American forms, whether it be accepted for 

 the more emphatically sculptured European and West Indian species 

 or not, and I can see no important characters to separate them. 



Genus AFORIA Dall, 1889. 



This name was applied by me to Pleurotoma circinata Dall, on 

 the mistaken statement of Jeffreys that it possessed no operculum. 

 Better material enabled the diagnosis to be corrected and the species 

 would have been referred to Leucosyrinx were it not for the fact 

 that a portion of the shells (males?) show in the adult a deep notch 

 or sinus in the anterior part of the outer lip between the canal and 

 the periphery, somewhat analogous to the sinus for the eye pedicels 

 in Strombus. Whether this is a sexual character remains to be 

 determined, but it occurs in so many specimens that it can not be 

 regarded as abnormal. 



Genus BORSONELLA Dall, 1908. 



It seems entirely probable that true Borsonia and Gordieria do 

 not exist on the Pacific coast, and that the relations between Anti- 

 planes and Borsonella are more intimate than those with any of the 

 European forms, notwithstanding the plait on the pillar in Bor- 

 sonella. With Casey I think tliat this is a feature which may occur 

 sporadically in a portion of any large group of Turritidae. 



Genus CYTHARA Schumacher, 1817. 



Cossmann states (Essais, vol. 2, p. 121) that this name was used 

 l^efore Schumacher, but he gives no reference and a careful search 

 has not revealed any binomial use of it, so I am obliged to regard 

 the statement as a mistake. Eucythara Fischer is a synonym. Schu- 

 macher's type, G. striata Schumacher, is said by several authors to 

 ])e identical with GanceJlana cithareUa Lamarck, 1822. Both 

 authors refer to the same figure of Chemnitz (1330), which repre- 

 sents a shell corresponding to the generally accepted type of Gythara. 



^Zittel, Traits, de Pal., vol. 2, p. 284 (Barrois translation), gives 1840 the date of 

 von Koenen's name, but I have not been able to verify this. 



