236 
CYCLOSTOMUS §. 10. 
superne subauriculatum. — Operc. exacte C. costulati Ziegl . , 
medio concaviusculum. — Long. 15, diam. 9 l /- 2 mill. Ap. 
intus 6 mill, longa. (Coll. Nr. 162.) 
Cyclostoma Banksianum Sow. Thes. N. 148. p. 144. t. 29. f. 194. *) 
— — Chcmn. ed. II. N. 165. p. 154. t. 21. f. 7. 8. 
t. 44. f. 17. 18. 
— hyacinthinum Adams Contrib. to Conch. N. 1. p. 9. **) 
Choanopoma Banksianum Gray Catal. Cycloph. p. 52. N. 19. 
Cyclosiomus Banksianus Pfr. Consp. N. 346. 
Habitat in insula Jamaica, Manchester Mountains. 
38 8 75. C. lralfialtensis Adams, f 
„Testa C. Banksiano similis, sed minor et gracilior; 
color coeruleo-brunneus, aetate vel expositione non mutans in 
aurantiacum prope aperturam; striae rudiores sunt, impressi- 
ones ( indentations ) obliquae saepe obsoletae. Operculum 
simile operculo C. hyacinthini. — Diverg. media circa 46°; 
long. 0,48 ; lat. max. 0,32 ; lat. min. 0,27 poll. (Ad.) 
Cyclostoma Yallahense Adams Contrib. to Conch. N. 9. p. 156. ***) 
Cyclostomus Banksianus var.? Pfr. Consp. p. 37. 
Habitat in parte orientali insulae Jamaicae, prope „Yallah’s 
Hill. 44 
*) T. ovato-pyramidali, tenuiuscula, pallescente, aurantiaco-brunnea pal- 
lidc strigata , apice decollato ; anfr. .3-4 rotundatis , tenerrime transversim 
striatis, striis paululum undulatis ; sutura distincta, crenulata ; apertura magna, 
circulari, aurantiaco-brunnea; peritremate duplici, interno tenui, paululum 
levato, externo angusto, reflexo, prope ultimum anfractum discontinuo ; um- 
bilico mediocri, spiraliter striato. (Sow. 1. c.) 
**) Shell ovate conic; deep greyish blue, often in the progress of 
growth becoming pale brown and then orange, always deep orange at the 
lip ; with rather strong but not very prominent often whitish transverse raised 
lines , which are mostly in groups of three or four , and are transversed by 
numerous spiral series of short rectangular obliquely situated indentations, 
which are of a dark brown in brownish parts of the shell, — with very 
unequal and inequidistant small crenulations in the suture ; spire with rather 
convex outlines ; apex truncate with the loss of two whorls ; four quite con- 
vex whorls remaining, with a deep suture; aperture orbicular, slightly ang- 
ulated above ; inner peritreme slightly produced ; outer peritreme narrow, 
concave, deeply striated, sharp -edged, wanting at the contact with the pen- 
ultimate whorl , auriculate above; umbilicus extending through. Mean di- 
vergence 58°; length 0,58; greatest breadth 0,45; least breadth 0,35 inch. 
(Adams 1. c.) 
***) Although this shell so much resembles the species with which 
we have compared it, a peculiar type is easily recognized in it. The two 
