104 CTENOPOMA. 



5. Ct. inBmerseam Quiidlacli. -J- 



.,Quocl attinet ad testam persimile C. ruguloso Pfr., sed 

 diversum operculi structura. — Operc. spira sensim ad nu- 

 cleum immersa et sulco suturali amplo." (G.) 



Cyclostonin immersum (hindl in Malak. Bl. IV. 1857. p. 42 et m Poey 

 Memor. II. p. 39. 



Habitat prope Matanzas insulae Cubae. 



6. Ct. <iefl«>iena daiBtllacBi. 



T. subperforata, ovato-turrita, truncata, tenuiuscula, liris 

 irregularibus cincta, plicis confertis, irregulariter fasciculatis, 

 liras transgredientibus et suturam denticulatam formantibus 

 lamellata, cinerascenti-albida ; spira rcgulariter attenuata, late 

 truncata; anfr. superst. oi/o (amissis 4), convexi, ultimus basi 

 scabrius liratus, antice disjunctus, pone aperturam nodulo 

 striato cum penultimo junctus; apertura verticalis, ovali-rotun- 

 data; })erist. duplex : internum parum prominens, externum 

 concentrice striatum, irregulariter patens et undulatum , parte 

 supera usque infra perforationem deficiente. — Operc. pla- 

 num. - — Long. 6 — 8, diam. 3 — 4 mill. Ap. 2 '/2 mill. lonija. 

 (Coll. Nr. 177 ) 



Cyclostoma deficiens Giind/. in Malak. Bl. IV. 1857. p. 42 et in Poey 

 Memor. II. p. 39. 



Habitat prope Matanzas insulae Cubae. 



7. Ct. coroiiatum Poey. 



T. subobtectc perforata, oblongo-turrita, truncata, tenuius- 

 cula , costulis confertis lamellaribus, ad suturam prominentio- 

 ribus sculpta, diaphana, albida; anfr. superst. S^j^ — 4 convexi, 

 ultimus antice subsolutus , nodulo reflexo cum penultimo jun- 

 ctus, basi carinis 2 lamellosis mumtus; apertura subverticalls, 

 fere circularis; perist. duplex: internum vix prominens, ex- 

 ternum continuum, patens, concentrice striatum , marqine un- 

 dulato-incisum. — Operculum planum, terminale. — Long. 8, 

 diam. 4 mill. Ap. diam. 21/4 mill. (CoII. Nr. 178.) 



striato cum anfr. contiguo junctus , basi spiraliter snlcatus ; apertura verti- 

 calis, parva, obliqiie ovalis ; peritr. duplicatum, internum rectura, externum 

 strictum, vix patens. — Operc. testaceum, nucleo parum excentrico, anfr. 4 

 oblique sulcati, sutura profunda disjuncti. — Long. 10—11, diam. 5 mill. 

 Ap. 3 mill. longa, 2 lata. — Hab. Matanzas, Cardenas etc. (Poey 1. c.J 



