170 F. Stoliczka — Two new species of Indian Lanclshells. [No. 3, 



Plectoptlis Shanensis, n. sp. 



PI. testa jplanorbulari, pallide fusca, apice minutissime exserto,pallido ; 

 anfractibus ^\, angustis, sutura indistincte marginata jwictis, priinis 2\ ad 

 trihus minute rugulosis, cceteris traiisversim oblique striatis atque concentrice 

 obsolete striolatis, ultimo ad peripJieriam subrotundato, infra paululum 

 ' angustiore, ad aperturam modice deflecco ; wmbilico spatiosOy anfractus omnes 

 sutura distincte marginata separatos exTiibente ; aperfura angulmn circiter 

 55° attinentem cum axi formante, peristomate undiqiie expansiusculo atque 

 incrassato, margaritaeeo liotescente, circiwidata, ad utramque terminationem 

 labii siibangidati profunde incisa ; labio plicis tribus distinctis instructo, 

 plica mediana crassissima, ea atque infer a multo tenuiore usque ad peristoma 

 extensis, tertia interposita a onargine remote evanescente, sed usque ad 

 laminam internam verticalem, circiter tertiam partem unius circuitus a 

 margine aperturali distantem, extensa ; ultimo anfractu intus supra laminam 

 verticaleni antice plicis sex crassiusculis, postice plicis decem brevioribus 

 atque tenuioribus instructo. 



Diam. maj. 21*5, min. 17, alt. 6*5 ; diam. aut alt. aperturce 7*5 m.m, 

 Dimensiones speciminis secundi oninoris sunt : ].8"5, 15, 5*8, QQ m.m. 



Hab. — Frovinciam JBurmanam ' Shan-states'' dictam. 



This Plectopylis is readily distinguislied from its allies by the presence 

 of three labial plicae, the strongest being in the middle and extending, like 

 the lower thin one, to the edge of the lip, while the intermediate one disap- 

 pears before it reaches the aperture, but it is the only one which extends 

 to the internal almost vertical lamina. This last is superseded anteriorly 

 by six stronger and posteriorly by ten thinner and shorter folds, but there 

 is no corresponding lamina present on the inner side of the last whorl. 



In external shape and character of volution the species is almost 

 identical with P. repercussa, except that in this latter all the whorls are 

 transversely striated on the upper side, and the last at the aperture a little 

 more deflected, the umbilicus also appears to be a little wider, and not only 

 the plicae at the mouth but also the internal laminae are totally different in 

 repercussa ; in this one there are two internal laminae on the inner lip one 

 behind the other, and one on the outer lip projecting in the space bounded 

 by the two others. 



Teachia Footei, n. sp. 

 Trach. testa albida, orbiculata, su^ra deplanata, infra inflata, versus 

 medium angustata, perspective modice umbilicata, undique dense granulifera ; 

 anfractibus 4 ad 4*5, gradatim accrescentibus, primis duobus aut tribus 

 convexiusculis, transvey^sim striatis, cceteris magis deplanatis, transversini 

 costulis incequalibus et obliquis ornatis, ultimo ad peripheriam valde carinato, 

 costulis in carina evanescentibus, ad aperturam valde descendente atque fere 



