2 66 WORMS. TESTACEA. 66. Ortrea. 



* Pufa* Shell equivalve with about 40 filiform rays, the furface often 

 irregular or distorted. 



Donovan s Brit Shells, i. tab. 34. 



Pennant Brit. Z00L iv. tab. 61. fig* 65. 



Da Coita Brit. Conch, tab. 10. fig. 3, 6. 



Lifter an. Ang. p. 186. tab. $.fig. 31. , 



Lister conch, tab. 18 1. fig. 18. /. 189. f, 23* 



Bonan. recr. and Muf. Kirch. 2, jig. 15. 



Knorr. Vergn. 4. tab. 12. fig. 2 and 5. /. 1 3./". 2* 



.Chemn. conch. 7. tab.6-j.fig, 635, 636. 



Inhabits European At/antic and American Seas, 



Shell generally fmall and a little longer thaa it is broad, fomc- 

 times with a fmooth furface, but moftly with an irregular 

 waved furface as if deformed by an accident: very variable 

 in its colours and marks, but commonly fine red: one of the 

 ears is very fmall, the other fharply fpined beneath. 



*Qbfoleta. Shell fmooth equivalve femitranfparent, dark purple, with 

 8 fubofelete rays. 

 Donovan's Brit,. Shells, i. tab. l»fig» 2. 

 Pennant Brit. Z00L iv. tab. 61, fig. 66. 

 Inhabits Brittfi Coafis, J of an inch long. 



Shell thin, the valves equal and (hallow, within fmooth and brown 

 with a pearly glofs ; outfide dull purplifh-brown with nu- 

 merous longitudinal ftrix between the rays; ears very unequal 

 wrinkled. 



* La?vis. Shell very fmooth ; ears ribbed* 



Inhabits Anglefea. Brit. Z00U iv. p. 102.. n. 67. 



* G lab ran. Ears nearly or quite equal: fhell equivalve with 10—15 



fmooth rlattith rays j the infide with elevated doubled 

 itrix'. 



Bonann* Muf. Kirch, and recr. 2. fig. 1 1— 13, 



Gualts test. tab. 73, H. tab. 74. A — D.^ Z. 



Klein oflr. tab. 9. fig* 29. Seba. Muf 3. tab. $J*fig. i6# 



Regenf conch. I. tab. I. fig. 10. /. ^.f 30, 31. 



Knorr Vergn. I. tab. 8. fig. 5, 2. /. 10./. 2. 



Born Muf. Cees. Vind. ted. tab. 6. fig. 4. 



Chemn. conch. 7. tab, 67. fig. 638 — 645. 



Inhabits European and American Seas : nearly 2 inches long and 

 as many broad .* roundifh j red yellow or brown, fpotted or 

 clouded, fometimes white with the upper valve fpotted with 

 brown ; margin repaid, 



* Opercular Shell with about 20 rays, roundifh aiid rough with dec uffate 

 r i s% ftrise 5 the upper valve a little more convex. 



Lifter 





