140 CRETACEOUS GASTROPODA 
XIII. Family,—BUCOCINIDZ. 
Bucciwip# and Cycrorsipm, Chenu; Buccinine® and nasstym# of Buccintipa#, H. and A. Adams; 
COMINELLINA, NASSINA, PHOSINA of Muricip# and Buccininz of Buccinipa, Gray). 
In the separation of the Buccryip# from the Purpuvrinm we intend to follow 
Chenu, but we do not think that there exists any necessity to distinguish the 
Cyrctopsip#, certainly not as an independent family, for there is actually not the 
slightest reason to be found in support of a separation of Cyclops, Montf., from the 
wassiv#, as I will mention subsequently. 
The animals of the Buccryip# have a distinct, truncate head, the tentacles of 
moderate length, with the eyes on their outer side sessile: the eye-peduncles being 
represented only by small bulgings, or somewhat produced and united with the 
tentacles; the proboscis usually long; the teeth in three series, the central being 
broad and fixed, the lateral versatile; mantle enclosed; siphon usually recurved ; 
foot simple, truncate in front, laterally waved and posteriorly always terminating in 
one or two points more or less produced. 
The operculum is annular, but varying in size, form, and the place of its 
nucleus, according to the different sub-families. 
The shells are mostly conically ovate, to a great extent smooth, and, if the 
whorls are ribbed transversally, the ribs are never unequal in strength; the canal is 
either very short or in most cases reduced to a deep notch, and the inner lip of 
the aperture is either smooth or dentate on the inner projecting margin only, but 
never folded. 
According to the different prevalent shapes of the shell and the form of the 
operculum, four sub-families were distinguished, especially by Gray. With regard to 
their relations to the Terzrronmzpm and Coxumueeritipa on the one side, and the 
Purpverrz on the other, they may be quoted as follows :— 
a. Sub-family—PHOSIN (Gray, Guide, 1857, p. 17). 
Genera; 1. Phos, Montfort., 1810. 
2. Northia, Gray, 1847. 
3. Cyllene, Gray, 1833. 
b. Subfamily—NASSIN (Gray, |. ce. p. 16). 
Genera; 1. Desmoulea, Gray, 1847. 
2. Cyclops, Montf., 1810 (Neritula apud Adams, 1. cit. p. 122). 
3. Nassa, Lamarck, 1799. 
4, Bullia, Gray, 1835, probably including Pseudostrombus, Adams, 
but excluding Leiodomus (in parte) and Adinus, forming separate genera, either 
here or in the Trrrowz1i #. Buccinanops, D’Orb., could be retained as a good genus. 
Chenu (Man. I, p. 164) formed for Cyclops, Montf. and Teinostoma, H. and A. 
Adams (Genera, I, p. 122), a separate family, Crczorsrp#, which certainly must be 
