. 
244 . Dr. Marox's and Mr.-RackgTTs © 
 Halitat in Ostream opercularem et Cancros, rarior, 
“Testa alba, rugis transversis, flexuris varians, nunc lateralibus, nunc sibi 
.. invicem oppositis. | 
Animal ut in precedente. An species vere distincta? 
Found on the Devonshire coast. 
12. 
triquetra.S, testa radiate V a rique. Linn. T Suec. 
` n.2206. Syst. Nat. p.1965. n. 195. Linn. Gmel. p.140. 
Ephem. Act. Nat. Curios. 1727. B 315. t. 10, 
Gualt. Test. t8 Vf. P. |a 
Linn. It. Wgoth. 170. 
Ellis Corall. t. 38. f. 2. 
.. Martini Conch, 1. t. 3. f. 25. : 
— —- Baster: Opusc. Subsec. 1. t. 9. f. CE 
` Pennant Brit. Zool. 4. t. 91. f. 157... 
Da Costa Brit. Conch. p. 20. t. SD 
Born Mus. t. 18. f. 14. : $ 
fugi in Hutch. Dorset. P 52. t 22, £9 o. 
` Testa sordidé alba vel pto iei ' opaca. raea EAN variabili, dorso ca- 
rinato, interdum lateribus leviter carinatis. 
Animal proboscide simplici tubiformi (unde a congeneribus Sopra) 
tentacùlis duobus Rc sic ee 
13. 
tubalavia. £ testa tereti, subulata; extremitate angustiore affixa, 
ir. N ontdeu.. at Torcross, Devon. 
| 2 44. Seni ilum. | 
