198 A DESCRIPTIVE CATALOGUE OF THE 



I refer to this species with some doubt, a worn specimen. 

 Scalaria georgettina, Kiener, is nearly allied. 



20. ScALA GRADATELLA, Morch, n. sp., PI. 29, fig. 11, 



T. imperforata, gracillima, lactea, polita; costse candidag, obliquse, superne ad suturam anguliferse 

 vel obsolete auritse, in anfr. ult. xi ; sutui'a canaliculata, constricta. Apertura ovalis. 

 Long. W^ mm.; diam. 3 ram. 



Ilab. St. Thomas ; specimen unicum (H. Krebs). 



Scala gradata, Sowb., is very like in shape, but much larger. 



. Sect. •****. Turbona, Browne. 

 21. Scala unifasciata, Sowb., PI. 29, fig. 13. 



T. turrita, imperforata, solida, nitida, alba, fascia ferruginea suturali, hue illuc striis spiralibus 

 subtilissimis ; anfr. convexiusculi, sutura simplice ; costse vii in anfr. ult., continufe, ambu- 

 lacra vix torta. Apertura circularis labio incrassato antice subcrenulato, angulaproducto. 



Long. 10 mm. ; diam. 4 mm. 



Scalaria unifasciata, Sowb., Thes. p. 98, t. 33, f. 68. 



Hab. Anguilla, St. Vincent (Riise, Krebs, Swift, Ravn.); St. Croix (Oersted) ; 

 St. Martins (Krebs) ; St. Jan. (Riise) ; Guadaloupe (Swift). 



22. Scala undecimcostata, Morch, n. sp. 



T. imperforata, abbreviato-turrita, solidissima, lactea vel isabellina, subtilissime et confertissime 

 spiraliter striata ; anfr. convexi, sutura profunda ; costag candidse, crassse, triquetrse, regu- 

 lares, sequales circ. xi in anfr. ult., ad suturam expansse, antrorsum adnatae; ambulacra 

 obliqua vix torta. Apertura ovalis pariete aperturali obtecto, labro crasso antice angulato. 

 Long. 10;^ mm.; diam. 4^ mm. 



Hab. St. Thomas (Krebs, Riise); Jamaica (Verkr.). 

 Allied to Scala monocycla. Lam, 



23. Scala octocostata, Morch, n. sp. 



T.,gracilis, alba, polita, striis spiralibus subtilis simis sub lente vix detegendis ; anfr. convexi- 

 usculi, sutura impressa ; costse viii in anfr. ult. simplices, continua, humiles, ambulacra torta 

 sigraoidea. Apertura obovata, pariete vix tecto, labio antice incrassato subefFuso. 

 Long. 8 mm. ; diam. 3 mm. 



Hab. St, Thomas ; spm. unicum (H. Krebs). 

 Scala Elenensis, Sowb., is the nearest allied. 



