Mr. E. A. Smith on Species of Bullidae. 35^ 



This species differs from C. pumilissiina in being much 

 more elongate, and in having an acute keel around the ver- 

 tical umbilicus; the basal part of the aperture is also less dilated. 



Cylichna perpusilla. B.M. 



C. testa minutissima, oblongo-ovata, superne latiore quam ad basim, 

 pellucida, omniuo Isevi, nitente ; apertura superne iQodice lata 

 super verticem producta, basi paululum dilatata ; vertex imper- 

 foratus, medio (ex quo surgit labrum) leviter depressus ; colu- 

 mella crassiuscula, baud torta. 



Long. 1| mill., diam. f. 



Hah. Persian Gulf, 14 fathoms {Col. Felly). 



One of the smallest forms yet discovered. It is quite smooth, 

 white, and shining, of an oval form, rather narrower at the 

 base than towards the vertex. 



Cylichna (^Mnestia) puncto-sulcata. B.M. 



C. testa late ovata, basi paululum angustata, tenui, baud pellucida, 

 fusco-alba, transversim tenuiter sulcata ; sulci 27, aequidistantes, 

 confertim punctati ; vertex umbilicatus, intus striatus, margine 

 rotundato circumdatus ; apertura lata, super verticem abquanto 

 producta ; labrum tenue ; columella incrassata, sinuosa ; umbibci 

 regio subperforata. 



Long. 4j| mill., diam. 3. 



Hah. Tunis, North Africa. 



This appears to be very distinct from any other species ; 

 and it is at once recognized by the 27 closely punctured striae, 

 which are at equal distances from each other. 



Cylichna [Mnestia) alhoguttata. B.M. 



C. testa ovata, aliquanto basi attenuata, tenui, semipellucida, al- 

 bida, confertim guttis laeteis opacis ornata, laevi, nitente, incre- 

 menti Uneis et transversim exiliter striata, superne basique di- 

 stinctius ; vertex valde umbiHcatus, intus transversim striatus, 

 margine rotundato circumdatus ; apertura superne latiuscula, basi 

 latior ; labrum tenue ; columella incrassata, alba, reflexa, fissuram 

 parvam fere tegens. 



Long. 8 miU., diam. 4|-. 



Var. Testa pallide rosea, guttis numerosis rotundis albis variegata. 



Hah. West Indies. 



This species is at once known from marmorafa, A. Ad., by the 

 difference of form. It is without the contraction just below the 

 vertex, the apical umbilicus is smaller and not surrounded by 

 so sharp an edge, the strise above and below are not so strongly 

 marked, and the aperture is not so produced upwards as in 

 that species. 



