105 



bilicus small, its volutions increasing rapidly, obliquely 

 striated. A very common Sicilian species, also found in 

 Provence. 



41. C. Melitense. (pi. xxiv. f. 53, 54.) nob. 



T. subcylindraceo-pyramidali, apice obtuso, spira aperturani 

 fere duplo superante ; anfractibus 5, ventricosis, spiral- 

 iter sulcatis, sulcis alternis obsoletiusculis ; apertura fere 

 circulari, superne subangulata, disjuncta ; sinistraliperitrematis 

 margine paululum expanse ; umbilico minimo ; operculo 

 spirali, anfractibus rapide majoribus, oblique striatis. 



Shell of a somewhat cylindrical pyramidal form, with an 

 obtuse, but not truncated apex, spire nearly double the 

 length of the aperture -, volutions five, ventricose, spirally 

 grooved, the alternate grooves nearly obsolete ; aperture 

 nearly circular, rather angular at the upper part, and separated 

 from the last volutions; peritreme white, its sinistral margin 

 somewhat spreading ; umbilicus very small ; operculum 

 spiral, its volutions rapidly increasing, obliquely striated. 



Malta. 



42. C. FERRUGiNEUM. (pi. xxiv. f. 55 to 57.) Lam. 



T. oblongo-pyramidali, apice obtuso, spira aperturani duplo 

 superante ; anfractibus 5 — 6, rotundatis, spiraliter sulcatis ; 

 apertura fere circulari, superne subangulata ; peritremate tenui, 

 acutiusculo ; umbilico minimo ; operculo spirali, anfractibus 

 rapide majoribus, oblique striatis. 



Shell of an oblong pyramidal form, with an obtuse, but 

 not truncated, apex, spire twice as long as the aperture; 

 volutions from 5 — 6, rounded and spirally grooved ; aper- 

 ture nearly circular, slightly angulated at the upper part ; 

 peritreme thin, rather sharp edged ; umbilicus very small ; 

 operculum spiral, with obliquely striated, and rapidly in- 

 creasing, volutions. Spain. 



43. C. DissECTUM. (pi. xxiv. f. 58, 59.) nob. 



T. oblonga, apice truncato, spira aperturani paululum 

 superante, anfractibus 4, rotundatis, spiraliter sulcatis, et 

 tenuissime decussatim striatis ; apertura fere circulari, 

 superne subangulata ; peritremate tenui, continue, disjuncto, 

 obtuse marginato ; sutura distincta, sulciformi ; umbilico 

 parvo. 



Shell oblong, very slightly acuminated, truncated or decol- 

 lated at the apex, spire somewhat longer than' the aperture ; 

 volutions four, rounded, spirally grooved, with very fine 

 decussating striae ; aperture nearly circular, somewhat angular 



