802 TUEBINELLUS. 



TULIPAEIA. Sw. A sub-genus of " Coi-onaxis," Sw. Lardn. 



Cyclop. Malac. p. 311. 

 TUHBINACEA. Bl. The sixth family of Polythalamacea, Bl. 



containing the genera Cibicides and Eosallites, microscopic 



Toraminifera. 

 TURBINACEA. Lam. A family of the first section of the order 



Trachelipoda, Lam. containing the following genera. 



1. SoLAEiTiM. With umbilicus reaching to the apex ; includ- 



ing Bifrontia and Orhis. Eig. 353 to 356. 



2. RoTELLA. A callosity on the under side. Eig. 357. 



3. Phasiakella. Oval ; operculum shelly. Eig. 367. 



4. Planaxis. Columellar lip flat ; aperture notched. Eig. 



365. 



5. TuEBO. Top-shaped; mouth generally round ; operculum 



shelly. Eig. 368. 



6. Trochus. Top-shaped; mouth generally angulated ; oper- 



culum horny, consisting of many whorls ; including Elen- 

 chas. Eig. 358, 359, 361. 



7. Maegarita. Operculum horny, consisting of few whorls ; 



pearly. Eig. 362. 



8. LiTTORiisrA. Similar, not pearly ; including Assiminea. 



Eig. 363, 363*. 



9. Phoeus. Attaching dead shells, stones, &c. Eig. 360. 



10. MoNODONTA or Odontis. a notch and prominent point at 



the lower part of the aperture. Eig. 366. 



11. Lacuna. With an umbilicus. Eig. 364. 



12. TuEEiTELLA. Elongated, screw-shaped. Eig. 369 to 371. 

 TURBINATED. (Turbo, a top.) Top-shaped, the term is applied 



generally to those shells which are large at one extremity, and 

 narrow to a point at the other. Ex. Trochus, fig. 358 ; Turbi- 

 nellus, fig. 382. 

 TURBINELLXJS. Lamarck. Ctistodonta, Schum. ? Scoltmus, 

 Swainsou. (A little top.) Fain. Canalifera, Lam. Siphonosto- 

 mata, Bl. — Descr. Turbinated, thick, wide near the apex, gene- 

 rally tuberculated ; spire short, depressed, mammillated ; aperture 

 rather narrow, terminating anterioi-ly in an open canal ; outer 



