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



Long. 21, diam. tnaj. 7 millim. 

 Hah. Bogota {Mus. Da Costa). 



A franannrpnh fracrilp sllpll. wit 



Hab. Bogota {Mus. Da Costa). 



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

 a Glandina. 



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

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

 fasca, vice siriatula ; spira parum etevata, regularis, apice 

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

 vexiusculi, ultimus nan descendens, rotundatuSy subtus convexus; 

 apertiira transverse lunato-ovalis ; peristoma acutum, marginibus 

 distantibus ; columella subveriicalis, dente miniito instructa. 

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

 Hab. Bogota {Mvs. 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 ; avfractus superstites 7, convexiusculi ; 

 costulis obliquis irregulariter undnlatis ornati, sutura impressa 

 sejuncti ; anfractus ultimus leviter attenuatus, ad basin ro- 

 tundatus, breviter solutus 5, longitudinis subcequans ; apertura 

 lute auriformis, majuscula ; peristoma continuum, expansum, 

 non reflexwm ; 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 unusual 

 character of being destitute of plicae. 



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

 I'esta late umbilicata, depressiuscula, olivacea, saturate olivaceo- 



fusco sonata, li}-is numerosis concentricis filiformibus instructa; 



spira levissime elevata ; sutura profunda; anfractus 5,convea;i, 



^ Since this paper was read Mr. Da Oosta has called iny attention to the 

 proximity of this shell to a species named by Bland Proserpina swifti, from 

 which it differs in being more convex and in having a much less pronounced 

 tooth on the coin nella. There is no doubt that the two species belong to the 

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

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

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

 excrescens (Mousson), from Viti Levu (Feejee Islands), has a similar dentiform 

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



