334 



growth, and coincident tine stria?. Septum flat or slightly 

 concave, its niai-gin nearly straight ; umbilicus moderately wide 

 profund. 



Dimensions. — Diameters, 17 and 13 ; height, 5. 



Locality. — Table Cape (B. M. Johnston .' ). 



Gexus Capulus. 

 Syn. — Pileopsis, Lamk. 



SPECIES EXCLUDED. 



Pileopsis naricelloicles, Johnston, is transferred to Calyptraea, 



1. Capulus eireinatus, -^ptr. nor. pi. vii., fig. 8. 



Shell cornucopia-shaped with a spiral recurved slightly 

 excentric apex, base roundly oval, sides slightly compressed; 

 whorls tw(3 and a-half, the anterior one detached ; surface with 

 fine radial threads crossed by slender folds and fine tlireads which 

 are arched medially. 



Dimensions. — Diameters, 2 '5 and 2 ; height, 3 '25. 



Locality. — Eocene : Adelaide-bore (one ex.). 



2. Capulus Danieli, C/ovst;. 



Syn. — C suhi'ufus, Sowerby, non Lamk. 



The fossils, which T refer to the living species (jf this name, 

 liave been compared with specimens of a species usually known 

 in Southern Australian waters as Capulus suhrufus^ Sowb., the 

 larger forms of which have received Crosse's name, as the result 

 of comparison of authenticated examples from New Caledonia. 



Tyron places the species in the genus Hipponyx, but as no 

 shelly base is formed, I retain it in Capulus. 



The shell has somewhat compressed sides, an irregular orbic- 

 ular base, but it is variable in these particulars, as largely 

 dependent on the outline of the surface of attachment ; the apex 

 is posterior usually turned to the left, and either prolonged or 

 subspirally hooked. 



The fossil specimens exhibit equal variation of shape and form 

 of apex, as do the recent ones, l^ut seem to be devoid of fine 

 radial ridges, and thus present the usual aspect of beach-shells. 



Localities. — Eocene : Muddy Creek !. Miocene : Aldinga 

 Cliffs and Muddy Creek \. 



FAMILY TURRITELLID.E. 



Genus Turritella. 



From the great variability in form and sculpture of the 

 majority of our fossil-species of this genus, one is tempted to 

 conclude that no satisfactory position can be taken up anywhere 



