298 ON NEW LAND-SHELLS FROM COLOMBIA. [Apr. 5, 



Long. 21, diatn. maj. 7 niillim. 

 Hal. Bogota {Mus. Da Costa). 



A transparent, fragile shell, with very much the appearance of 

 a Glandina. 



Hyalinia gomezi', n. sp. (Plate XXIII. figs. 5, 6.) 

 Testa perforata, depresso-rotundata, tenuis, pellucida,. nitida, 

 fusea, viv siriatula ; spira parum elevata, ref/ularis, apice 

 ohtusiusculo ; sutura appresso-marginata ; anfractus 5, con- 

 vexiusculi, ultimas nan descendens, rotimdatus, suhtvs convexus; 

 apertura transverse lunuto-ovalis ; peristoma aciitum, marginibus 

 distantihus ; coluviella subvert icalis, dente minuto instructa. 

 Diam. maj. 1 1, min. 9|, alt. 8 millim. 

 Hab. Bogota (Mus. Da Costa). 



A. small hyaline shell, the only remarkable character of which is 

 the presence of a minute tooth or tubercle on the columella. In 

 this and other respects it bears a strong resemblance to some of 

 the Polynesian species of Microcystis, though from its habitat it 

 is probably rightly placed in the genus Hyalinia. 



Clausilia magistra, n. sp. (Plate XXIII. figs. 1-4.) 

 Testa magna, anguste fusiformis, solidiuscula, sinistrorsa, nigro- 

 fusca ; spira elongata ,■ anfractus superstites 7, conve.viusculi ; 

 costulis obliquis irreguhiriter undulatis ornali, sutura impressa 

 sejuncti ; anfractus ullimus leviter attenualus, ad basin ro- 

 tundatus, hreviter solu/us g, Inngitudlnis subcequans ; apertura 

 late auriformis, majusnula ; peristoma continuum, expansum, 

 non rejifxuni ; lamella superior arcuatim subverticalis, parvi- 

 uscula, subcompressa ; lamella inferior obliqua, latiuscula ; 

 clausilium tenue, leviter arcuatum ; plicis nullis ; lunella nulla. 

 Long. 38, diam. maj. 7 millim. 

 Hab. Bogota {Mus. Da Costa). 



A fine large species, elegantly sculptured with irregularly undu- 

 lating oblique costulae. In form it closely resembles the smaller 

 species, C. epistomium (Pfeiffer), which is found in the same 

 locality. The internal structure presents the somewhat uuusual 

 character of being destitute of plicae. 



Cyclotus filo-liratus, n. sp. (Plate XXIII. figs. 17-19.) 

 Testa late umbilicata, depressiuscula, olivacea, saturate olivaceo- 



fitsco sonata, liris numerosis concentricis filiformibus instructa ; 



spira levissime elevata ; sutura profunda ; anfractus 5, convex!, 



' Since this paper was read Mr. Da Costa has called ray attention to the 

 proximity of this shell to a species named by Bland Proserpina swrfti, froni 

 whicli it differs in being more convex and in fiaving a much less pronounced 

 tooth on the colu nella. Tliere is no doubt that the two species belong to the 

 sane genus ; but the animals being unknown it is impossible to speak with 

 certainty as to their position. Judging from the shells, however, I think it 

 very unlikely that they belong to the Proserpinidse. The little Microcystis 

 cxcresceiis (AIoussou), from Viti Le\u (Feejee Islands), ha* a similar dentiform 

 calluB on the columella. — G-. B. S. 



