PERRONA. 231 
by revolving lines; nodulous at the periphery, and less distinctly 
so inferiorly. Length, 27 mill. 
Japan. 
I include this species in Clavatula on account of the opercu- 
lum, which has a subcentral nucleus, rather near the inner 
margin. 
C. TexTiLis, Hinds. Straits of Macassar. 
Shortly diagnosed in Zool. Proc., 1843, but not included with 
the other species in the Moll. of Voy. Sulphur, nor figured in 
Reeve’s Iconica. The species must, therefore, have been either 
mislaid or discovered to have no claim to recognition. Clava- 
tula, according to Hinds, contained numerous species now 
excluded from that group. 
Subgenus PERRoNA, Schum., 1817. 
Dr. Fischer has separated Tomella, Swainson, as a subgenus, 
characterized by spire not carinated, sinus wide near the middle 
of the outer lip; type, C.lineata. The position of the sinus in 
that species depends upon the extent of the callosity upon the 
upper part of the inner lip, and the spire is so variable, some 
specimens of undoubted lineata being subcarinate, that J do not 
think the distinction can be maintained. 
C.tINEATA, Lam. PI. 8, figs. 10, 11. 
Shell smooth, body-whorl more or less constricted above, the 
spire sometimes very short, and sometimes long; whitish or 
yellowish brown, thickly flexuously longitudinaliy lineated with 
chestnut or chocolate. Length, 1—1°5 inches. 
W. Africa; Cape of Good Hope. 
C. raxus, Chemn. PI. 8, fig. 14; Pl. 32, fig. 15. 
Shell yellowish brown, flexuously lineated with chestnut, under 
a thick olivaceous brown epidermis; whorls constricted above, 
slightly nodulously longitudinally plicate below, and flexuously 
longitudinally striate ; aperture brownish. 
Length, 2°75—4 inches. 
Cape of Guod Hope. 
C. opesa, Reeve. PI. 8, figs. 9, 4. 
_ Whorls corded below the suture, with a constriction below the 
16 
