SOWERBY : MARINE SHELLS OF SOUTH AFRICA. 153 



sulcis spiralibus mimerosis sculptus. Apertura subcircularis, 

 obliqua ; peristoma simplex ; columella crassiuscida, plan- 

 iilata. Operciuum calcarium, extits album, complanatum. 

 Diam. i}^ mill, alt. 1}^ mill. 



A minute species of a pale yellowish colour, of which 

 the spiral grooves are twice as numerous as in T. sanguineus. 

 Trochus (Gibbula) cicer Menke ( ^ Trochus musizms 

 Gould ; =Turbo cicer Sow.). I find that this species is not a 

 Turbo (Collonia). It was erroneously included in my 

 monograph of that genus in 1886, when I had not seen the 

 operculum, which proves it to be a Trochus coming under 

 the section Gibbula. 

 Trochus (Gibbula) roseus Gmel. There is some uncertainty 

 as to the correct identification of this species. A small live 

 shell submitted to me by Mr. Ponsonby seems to agree 

 better with the description than that figured in Philippi's 

 monograph. It is not at all like T. cicer, of which Krauss 

 thought it might be a variety. 

 Trochus (Gibbula) bifurcatus A. Adams. A very character- 

 istic species, not often met with. 

 Trochus (Galliostoma) Fultoni Sow. n. sp. (PL iii, fig. 7,). 

 T. testa acute conica, elata, anguste umbilicata, pallide fulva, 

 fusco strigata, strigis plenwique dtiplicatis ; anfractus 7 — 8, 

 planato declives, carina angusta vix elevata marginati, sutura 

 incisa sejuncti, striis irregularibus plus minusve conspicuis 

 aut obsoletis obliquis et spiralibus cancellati ; anfractus ulti- 

 mus infra angulatus ; basis convexa, spiraliter sulcata; 

 timbilicus angustus sed profundus ; apertura obliqua, sub- 

 angulata, fauce Icevi ; peristoma acutum ; columella vix 

 callosa. 

 Long. I J mill.; maj. diam. 10 mill. 



The form of this species is similar to that of T. 

 suarezensis (Fischer). The umbilicus, although narrow, is 

 sharply defined, so as to bring the species near to the 

 section Eutrochus. 



