204 A DESCRIPTIVE CATALOGUE OF THE 



Long. It mm. ; diam. 1 mm. 



Scalaria crenulata, Kien. Icon. p. 17, t. 6, f. 18. 



Scalana crenata, L., Sowb. Thes., p. 505, No. 88, fig. 123. 

 ■ Scalana sp., Weinkauf, Mittelm., p. 241. 



Hab. St. Thomas (Riise); Porto Plata, St. Martin, Anguilla (Krebs); Jamaica 

 (C. B. Adams); Arecibo (J. W. Newton). 



The described specimen is from Mr. Riise's collection, the other being imperfect. 

 This species is also much broader than the Mediterranean species 8. crenata. 



37. ScALA (Opalia) Hotesseriana, D'Orb. 



T. imperforala, turrita, subcyliiidrica, crassa, leviter flexa, alba vel interdum lilacina, subtilissime 

 spiraliter striata; sutura foveolata sed non canaliculata ; costae crassge, convexse, obliquge 

 xi-xii in anfr. ult.; costa basali crassa utrinque foveolata. Apertura orbicularis, peritremate 

 crasso, antice producta. 



Long. 11^ mm.: diam. 4 mm.; sed plerumque minor. 

 Scalaria Hotesseriana, D'Orb., Cuba, p. 16, t. xi, f. 22-23. 

 Scalaria crassicosta, Mus. Brit., Sowb. Thes. p. 104, No. 83, f. 119 (non Desh.) 

 Bissoa crassicosta, C. B. Adams, Proc. Bost. Soc, Jan. 1845, p. 6. 

 Scalaria grossicostata, Nyst., Tabl. 1873, p. 36, No. 136. 

 Turlo coniferus, Mtg. Brit. Shells, p. 314^ 

 Hab. Guadeloupe (Hotessier); St. Martins (Swift); St. Thomas (Krebs, Riise). 



38. ScALA (Opalia) sc^va, Morch, n. sp. 



T. imperforata, turrita, albescens, spiraliter et subtilissime confertissime, striata ; anfr. convexi, 

 obsoletissime confertissime striata; anfr. convexi, medio obsoletissime angulati, costte crassce 

 confertse, versus suturam attenuatse, in anfr. ult. circ. xv obliques plicae formes, umbilicum 

 versus ssepe evanescentes; spira varioribus 2 ; sutura crenulata. Apertura ovalis, peritremate 

 crasso. 



Long. 13 mm.; diam. 4| mm. 



Var. a, costis obsoletis. Long. 12 mm,; diam. 4 mm. 

 Hab. St. Thomas (Krebs, Biise). 



39. Scala (Opalia) subvaricosa, Dkr. (MSS.), n. sp. 



T. turrita, subcylindrica, imperforata, lactea, subtilissime et confertissime spiraliter striata ; anfr. 

 medio angulati; costse obsoletee, pone angulum furcatse; anfr. ult. carinis 2, carina anteriore 

 minore nodosa; sutura foveolata; fovse circ. 16 in anfr. ult. Apertura ovalis, peritrema 

 marginatum. 



Long. 14 mm.; diam. 4 mm. 

 Hab. St. Thomas^ Anguilla (Krebs, "Riise); Bahama (Riise). 



