388 
236 CYCLOSTOMUS &. 10. 
superne subaurieulatum. — Opere. exacte C. costulati Ziegl., 
medio concaviuseulum. — Long. 15, diam. 9'/, mill. Ap. 
intus 6 mill. longa. (Coll. Nr. 162.) 
Cyclostoma Banksianum Som. 'Thes. N. 148. p. 144. t. 29. f. 194, *) 
-— — Chemn. ed: II*3N. 165, p. 154. t. 21. £758. 
1. 44..f. 11. 18. 
- hyacinthinum z4dams Contrib. to Conch. N. 1. p. 9. **) 
Choanopoma Banksianum Gray Catal. Cycloph. p. 52. N. 19. 
Cycloslomstss Banksianus Pfr. Consp. N. 346. 
Habitat in insula Jamaica, Manchester Mountains. 
75. €. Xallahensis Adams. 
.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 (üindentations) 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.) 
Cuclostoma Yallahense -4dams Contrib. to Conch. N. 9. p. 156. ***) 
Cyclostomus Banksianus var.? Pfr. Consp. p. 37. 
Habitat in. parte orientali insulae Jamaicae, prope ,Yallah's 
Hill.* 
*) T. ovato-pyramidali, tenuiuscula, pallescente, aurantiaco-brunnea pal- 
lide strigata, apice decollato; anfr. 3 — 4 rotundatis, tenerrime transversim 
striatis, striis paululum undulatis; sutura distincta, cerenulata; apertura magna, 
circulari, aurantiaco-brunnea; peritremate dupliei, interno tenui, paululum 
levato, externo angusto, reflexo, prope ultimum anfraetum discontinuo; um- 
bilico mediocri, spiraliter striato. (Sow. l. 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; umbilieus extending through. Mean di- 
vergence 58?; length 0,58; greatest breadth 0,45; least breadth 0,35 inch. 
(Adams l. 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 
