64 CERNOHORSKY 
Genus Mitromorpha Carpenter, 1865 
Mitromorpha Carpenter, 1865, Ann. Mag.Nat.Hist. (3) 15:182. Type species of M M.filosa 
Carpenter = Daphnella filosa Carpenter, 1864 (non Columbella filosa Dujardin, 1837 = 
Mitromorpha) = Mitromorpha carpenter Glibért, 1954. Recent, Eastern Pacific. 
Shell small, biconic, usually with a short spire and longer, narrow aperture, 
columella edentulous in adult specimens, anal sinus weak to moderately prominent, 
siphonal canal unnotched, protoconch paucispiral and with 14-2 dome-shaped 
embryonic whorls. Operculum lacking. Radula with a simple barbless shaft with a 
constriction a short distance behind the tip, base expanded. 
I‘follow Emerson & Radwin (1969) and Keen (1971) in considering the presence 
or absence of columellar folds in this turrid group to be of diagnostic importance. 
Species without folds on the columella are edentulous in the juvenile as well as adult 
stage, but in the Mitrolumna group, species which always have a biplicate columella 
in the adult stage, will have an edentulous columella only in the juvenile or immature 
stage. 
Subgenus Lovellona Iredale, 1917 
Lovellona Iredale, 1917, Proc.Malac.Soc,Lond. 12(6):329. Type species by OD Conus 
atramentosus Reeve, 1849, Recent, Indo-Pacific. 
Shell small, coniform, with a short spire and long aperture, columella edentulous, 
anal sinus absent, protoconch conical and with 2/4-2% smooth whorls. Operculum 
absent, radula as in Mitromorpha. 
This weak subgenus which appears to be monotypic, differs only slightly in shape 
from Mitromorpha and the protoconch is conical multispiral rather than domed 
paucispiral as in Mitromorpha. Kay ( 1979) described the protoconch of M. (L) 
atramentosa as “paucispiral, consisting of 114 smooth, white whorls”. Kilburn (1986) 
gave an SEM photograph of the protoconch of M. (L.) atramentosa and described the 
protoconch as consisting of 2'/ embryonic whorls. Specimens which I examined had 
a conical protoconch of 2'4-2% smooth embryonic whorls. 
The Hawaiian Lovellona peaseana Finlay, 1927 (Fig. 1), belongs to 
Mitromorphas.str. | have not seen the type specimen of Conus micarius Hedley, 1912, 
but specimens seen in collections with this name were worn M. (L.) atramentosa 
(Reeve). 
Subgenus Mitrolumna Bucquoy, Dautzenberg and Dollfus, 1883 
Mitrolumna Bucquoy, Dautzenberg & Dollfus, 1883, Moll.mar,Roussilon 1(3):115, 121. Type 
specimens by OD Mitra olivoidea Cantraine, 1835. Recent, Mediterranean. 
Similar to Mitromorpha in shell and radular features but the columella of adult 
specimens of Mitrolumna has 2 folds and the protoconch is either paucispiral or 
multispiral and contains from 14-34 embryonic whorls. 
