CYLINDRELLA §. 6. 7. 575 



rectis, dislantibus muniti, ultimus confertius costatus , antice 

 solutus, arcuatim oblique descendens, latere externo angulatus, 

 basi carinatus; apertura parvula, subcircularis, intus subtetra- 

 gona; perist. undique breviter expansum. — Long. 6V2, diam. 

 1% mill. Ap. diam. 1 mill. (Mus. Cuming.) 



Cylindrella costulata Adams Contrib. to Conch. N. 2. p. 20. 

 HabiLat in insula Jamaica. 



6L pallida Guild. (Coll. 34. — Mychostoma Alh. 



p. 208. — Cyl. costulosa Adams Gontrib. to Conch. 



N. 6. p. 98.) Mon. II. p. 379. 



62. seminuda Adams. (Coll. 35. — Mychostoma 



Alb. p. 208.) - - - 380. 



63. C. Robertsi Adams. •{• 



T. elongata, fusiformis, alba, interrupte lamellato-costata, 

 truncata; sutura profunda; anfr. superst. 9 — 10 subplanati, 

 medio laevigati, infra et supra suturam breviter costati (costis 

 circa 15 m quovis anfractu), ultimus longe disjunctus, iatere 

 dextro et basi marginatus; apertura superne et basi subangu- 

 lata, latere dextro distinctius angulata; labrum tenuiusculum, 

 modice expansum, in planum aperturae reflexum. — Long. 

 0,37; lat. 0,095 poll. (Ad.) 



Cylindrella Boljertsi Adams Contrib. to Conch. N. 9. p. 160. 

 Habilat in insula Jamaica. 



64. C. Greyana Adams. 



T. subulata, solidula, truncata, distanter elevato-costata 

 (costis circa 6 in quovis anfractu), albida; anfr. superst. 8 con- 

 vexi, subaequales, ultimus non solulus, basi subattenuatus; 

 apertura verticalis, parvula, ovalis; perist. continuum, superne 

 appressum, caeterum brevissime expansum. — Long. 77^, diam. 

 12/3 mill. Ap. 1 mill. longa. (Coll. Nr, 36.) 



CylindreUa Greyana Ada^ns Contrib. to Conch. N. 5.' p. 82. 



Geomelania Greyana Adams Catal. Jam. Apr. 1851? 

 Habitat in insula Jamaica. 



. §. T. 

 65. C. Agnesiana Adams. 



T. sinistrorsa, subcylindrica, gracilis, truncata, tenuius- 

 cula, oblique confertim costulato-striata, diaphana, albida; spira 

 valde elongata, sursum sensim attenuata; anfr. superst. 19 — 

 22, superi plani, sequentes sensim convexiores, ultimus obli- 

 que longe protractus, tetragonus, basi, dorso et latere externo 

 coiupresse carinatus, latere interno angulosus; apertura sub- 



