266 
CISTULA §. 3. 4. 
435 11. C. i*adula Pfr. 
T. perforata, ovato-oblonga, truncata, tenuis, lineis eleva- 
tis spiralibus et costis acutis longitudinalibus subtiliter asperato- 
decussata, non nitens, pallide cornea, fasciis angustis, inter- 
ruptis, rufis ornata; spira sursum attenuata, late truncata; 
sutura profunda, subsimplex; anfr. superst. 4 convexi, ultimus 
angustior, rotundatus; apertura verticalis, subcircularis ; perist. 
duplex : internum continuum, vix porrectum, externum dilata- 
tum, horizontaliter patens, concentrice striatum, ad anfr. penul- 
timum subexcisum, margine sinistro fimbriato-inciso. — Operc. 
normale, nucleo parum excentrico. — Long. 14, diam. 7 mill. 
Ap. 4 mill, longa. (Mus. Cuming.) 
Cyclostoma radula Pfr. in Proc. Zool. Soc. 1851. Jul. f 
— — Chcmn. ed. II. N. 319. t. 41. f. 13. 14. 
Cistula radula Pfr. Consp. N. 390. p. 67. 
Habitat Almendares prope Havana (Morelet). 
§• 4. 
436 12. C.? saggittifera Adams, f 
T. perforata, elongata, ovato-conica, lineis minutis spira- 
libus elevatis et plicis confertissimis subtilibus decussata, 
albida, lineis numerosis angulosis saturate fuscis, inaequidi- 
stantibus et maculis irregularibus brunneis prope suturam no- 
tata; apex truncatus; spira subelongata, curvilinearis ; anfr. 
superst. 4 convexi ; apertura oblique ovalis ; perist. duplex : 
internum crassum, modice productum, subreflexum, externum 
postice modice productum et non reflexum, caeterum magis 
productum, fere in planum aperturae reflexum, latere sinistro 
anterius sinuosum. — Operc.? — Diverg. media circa 45°; 
long. 0,96 ; lat. max. 0,63 ; lat. min. 0,55 poll. (Ad.) 
Cyclostoma sagittiferum Adams in Ann. Lyc. N. York V. N. 2. p. 53 
et Contr. to Conehol. N. 8. p. 137. *) 
Cistula ? sagittifera Pfr. Consp. N. 391. 
Habitat in insula Jamaica (Chitty). 
*) Shell elongate, ovate conic: dingy white, with numerous inequidistant 
dark brown zigzag lines, with the four angles which are directed backwards 
arranged in spiral series on stripes of paler brown ; with irregular transverse 
spots of dark brown next below the suture: with very crowded fine transverse 
ridges, which interrupt minute spiral elevated lines : apex truncate with the 
loss of — whorls : spire rather long , with the outlines curvilinear : whorls 
remaining after truncation four, quite convex, with a Avell impressed suture : 
aperture obliquely ovate, with two peritremes; of which the outer one is 
