112 CYCLOTOPSIS. 



Cijdotopsis (noviim genus Cyclostomidarum) W. T. Blanf. in Ann. and 



Mag. uat. hist. Jun. 1864. 

 Cijclostoma sp., Cyclotus sp. Auct. 



Genus characteribus plurimis Choanoj.amati affine. 



Species: 



6.55. 1. semistriata Sow. (Coll. 257. — Cifcloius Pfr. 



Mon et Suppl. — fifeve t. 4. f. 16. — Ctjclo- 

 topsis Blanf. 1. c. — Ind. orient.) . ... Pneum. II. p. 20. 



656. 2. subdiscoidea Sow. (Cyclofus Pfr. Mon. et 



Suppl. — lieere t. 4. f. 21. — Cyclotus 

 aratus Bens., Pfr Mon. — Ind. oriental. — 



„An eadem species ac praecedens?" Blanf.) . - - - 23. 



Obs. Conf, CijcJotus spurcus Grat. et Cyclotus Trailli Pfr. 



XXVI. Ctenopoma Slmttleworth. 



Pfr. Mon. Pneiim. Suppl. p. 102. 



Conspectus specierum. 



A. [Jmbilico clauso §. 1. Nr. 1—6. 



B. Subrimatae §.2.-7—9. 



C. Perforatione sublibera. 



a. Peristomate subsimplice . . . §3. — 10 — 11. 



b. Peristomate duplice §.4. — 12 — 18. 



c. Peristomate undulato vel crenato S- 5. — 19 — 25. 



§. 1. 



657. 1. ct< torfiiKataam C-Bitiei'i'«z. 



T. clause perforata, ovato-oblonga, truncata, solidula, liris 

 spiralibus costisque chordaeformibus illas transgredientibus, 

 confertissimis , fasciculatis sculpta, albida ; sutura fortiter fas- 

 ciculato-crenata ; anfr. superst. fere 4 modice convexi, ultimus 

 antice nodulo anfractuin contiguum tangente lirisque basalibus 

 nonnullis validioribiis munitus ; ajjertura verticalis, ovalis; perist. 

 duplex : internum parum prominens , extei-num superne et 

 latere sinistro late expansura , supra umbilicum adnatum, 



