CYLINDRELLA §. 6. 7. 575 



leclis, distantibus munili, ultiinus conferlius costatus, antico 

 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 Contiib. to Conch. N. 2. p. 20. 

 Habitat in insuia Jamaica. 



61. pallida Guild. (Coll. 34. — Mychostoma Alb. 



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



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



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



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



63. C. Roberisi Adams. •{• 



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

 Iruncata; sutura profunda; anfr. superst. 9 — -10 subplanati, 

 medio laevigati, infra et supra suturam breviter costati (coslis 

 circa 15 in quovis anfractu), ullimus longe disjunctus, latere 

 dextro et basi marginalus; apertura superne et basi subangu- 

 lala, lalere dextro dislinctius angulata; labrum tenuiusculum, 

 modice expansum, in planum aperturae reflexum. — Long. 

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



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

 Habitat 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 solutus, basi subattenuatus; 

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

 appressum, caeterum brevissime expansum. — Long. 7^2 , diam. 

 ^% mill. Ap. 1 mill. longa. (Coll. Nr. 36.) 



Cylindrella Greyana Adams Contrib. to Conch. N. 5. p. 82. 



Geomelania Greyana Adams Catal. Jam. Apr. 4 851? 

 Habitat in insula Jamaica. 



§• 7. 

 65. C. Agnesiana Adams. 



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

 cula, oblique confertim costulato-striala, 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 

 compresse carinatus, latere interno angulosus; apertura sub- 



