42 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
TARCUATOMITRELLA, F. Sacco, 1890: ‘Sezione [of Mitrella] (Arcuato- 
mitrella), Sacco, 18897’: in Bellardi, Mem. Accad. Torino, ser. 11, 
vol. xl, p. 329: Zyrx.—|[ Not specified ; first sp. C. precedens, 
Bell. 
astyris, H. & A. Adams, Oct. 1853: ‘‘Sub-gen. [of Amycla] Astyris, 
H. & A. Adams”: Genera Rec. Moll., vol. 1, p. 187: Trexz— 
[ Not specified ; ‘‘ C. clausiligforme, Kiener,” selected by Tryon, 
1883. ] 
The alphabetical list of species accompanying the original 
description of this group is a most miscellaneous assemblage and 
contains representatives of almost every section of Columbellide : 
such diverse types as C. avara, Say, clausiliformis, Kien., Marquesa, 
Gask., undfascvata, Lam., and sagitta, Gask., being included. The 
diagnosis, moreover, enumerates no characters of sectional value. 
As might be expected, this group-name has been used in very 
different senses by subsequent writers: Tryon gave C. clausili- 
formis as an example, Fischer selected C. rosacea, Gld., while the 
majority of authors apply the name to the group represented by 
C. avara, Say, which species is the first one in Adams’ list. 
atinta, H. & A, Adams, Oct. 1853: “ Sub-gen. [of Columbella| Atiha, 
H. & A. Adams”: Genera Rec. Moll., vol. i, p. 184: 7ypz.— 
[Not specified; C. suffusa, Sby., selected by Chenu, 1859. ] 
The first species mentioned in Adams’ (alphabetical) list of 
species is C. conspersa, Gask., and most authors use the name 
Atilia for the group of Columbellide of which this form is a repre- 
sentative. The list, however, also includes such diverse types as 
C. jaspidea, Sby., and C. suffusa, Sby.; and the latter species, 
having been first selected as an example of the section, must be 
regarded as the type. 
BIrurcINA [i.e., Bifurcium], Fischer. 
pirurcium, P. Fischer, June 30, 1884: ‘‘Section [of Strombina] 
Bifurcium, Fischer. 1884”: Man. Conchyl., p. 638: Zype.— 
« (. bicanalifera, Sowerby.” 
}BRACHELIXELLA, F. Sacco, 1890: ‘Sottogenere [of Columbella} 
Brachelivella, Sacco 1889”: in Bellardi, Mem. Accad. Torino, 
ser. 11, vol. xl, p. 326: Z'ypx—C. Klipsteini, Micht. 
CIONELLA [1.€., Conella |, Swainson. 
cirHAropsts, W. H. Pease, Nov. 3, 1868: ‘‘ Crtharopsis, nov. gen. 
Pease’?: Amer. Journ. Conch., vol. iv, p. 97: Zypz.—[Not 
specified; C. lachryma (Rve.). | 
This group appears to have been founded by Pease for the 
reception of the same miscellaneous assemblage of small Polynesian 
forms for which he. a few months previously, had established the 
ecnus Seminella; and, as in the case of the latter group, it is very 
difficult to say what species should be regarded as the type. Much 
confusion has arisen regarding these two group-names, and perhaps 
the most satisfactory course would be to discard both of them; 
but if they are to be retained it will be best, in my opinion, to 
restrict the name Citharopsis to the very distinct group of 
