188 CONID A. 
fringed at the margin, and can sufficiently dilate itself to admit 
the tip of the little finger into the orifice. Operculum small, 
unguiculate, slightly curved. C. tulipa, Linn. (lviii, 47). 
DENDROCONUS, Swains. Shell thick, convex-conic; spire trun- 
cated, not coronated. C. figulinus, Linn. (lix, 51). 
LitHoconus, Mérch. Conical, carinated at the suture. C. 
literatus, Linn, (lix, 52). 
LEPTOCONUS, Swains. Conical, sometimes striated; spire ele- 
vated, sharp, concave. The foot of C. miles, says Quoy, is very 
narrow, and the operculum longer than usual; the tentacles are 
slender and the veil pointed at the extremity. C. nobelis, Linn. 
(lix, 53). 
ruIzoconus, Morch. Shell conical, smooth; spire short but 
sharp, last whorl carinated at the suture. C. generalis, Linn. 
(lix, 54). 
CHELYCONUS, Morch Spire elevated, last whorl convex near 
the suture. C. spectrum, Linn. (Iviii, 48). 
CYLINDER, Montf. (Textilia, Swains.) Shell conic-cylindrical, 
smooth; spire elevated, sharp; last whorl slightly ventricose. 
C. textile, Linn. (Iviii, 49). 
HERMES, Montf. (Theliconus, Swain.) Subcylindrical, with 
revolving ribs; spire elevated, obtuse, convex. C. tendineus, 
Brug. lix, 55). 
CONORBIS, Swains. Spire much elevated; outer lip sinuous, 
forming an oblique posterior sinus. Connects Conus with 
Pleurotoma. Eocene; England, France. C. dormitor, Sol. 
(Ivili, 50). 
The above divisions are partly recognized as genera, partly as 
subgenera, by H. and A, Adams; but they possess little value, 
as their characters merge one into another. Weinkauff, who 
has recently monographed the genus, casts aside these divisions, 
and in their stead proposes sections, named after certain specific 
types, as follows: 
1. Marmorei. (Typical Conus.) C. marmoreus, Linn. 
2. Literati. (Lithoconus in part.)  C. literatus, Linn. 
3. Figulini. (Dendroconus.) C. figulinus, Linn. 
4, Arenati. (Puncticulus.) C. arenatus, Hwass. 
5. Mures. (Coronaxis.) C. mus, Hwass. 
6. Varii. C. varius, Linn. 
7. Ammirales. (Leptoconus and Rhizoconus in part.) C. 
ammiralis, Linn. 
8. Capitanei. (Rhizoconus in part.) C. eapitaneus, Linn. 
9. Virgines. ( Lithoconus in part.) C. virgo, Linn. 
10. Dauci. (Rhizoconus in part.) OC. dauwcus, Hwass. 
11. Magi. (Phasmoconus and Pianoconus, Morch.) C.magus, 
Linn. 
12. Achatini. (Chelyconus.) C. achatinus, Chemn. 
