20 



MULTIVALA^ES, PHOLAS, 



LEPx\S. — Acorn Shell or Burnacle. 



A. Affixed at the base to other substances. 

 *Balaiin,s. (Common A. S.) *Tiilipa. 



*liiii\;\\\oii\es.( Small striated A. S.J Minor. 

 *lntertexta. Verruca. 



*Cornubiensis. Aiigusiata. 



*Tiiitinnal)uliini ( Tulip A.S.) ' Porosa. 

 *Diadema {Turban A. S.) Elongata. 



*Bal£eiiaris. {Whale A.S.) Patellar is. 



*Costata. Spinosa. 



•Conoides. Viclacea. 



■*Testudinaria. Cylindrica. 



*Galeata. Crispata. 



*Palmipes. Cariosa. 



Str«niia. 

 B. Affixed hy a peduncle. 



Aurita. 



Psittacus. 



Anserifera {Striated A.S.) Pollicipes {Cornucopia.) 



*Anatifera {Barnacle, Goose-shell.) 



Mitella. 

 Scalpellum. 



PHOLAS.— Stone-piercer. 



A nimal — an Ascidia : shell bivalve, divaricate, ivith several 

 smaller, differently-shaped accessory valves at thehinge: 

 — hinges recurved, united by a cartilage; in the inside, 

 beneath the hinge, is an incurved tooth. 



It appears that hitherto only twelve species of this ge- 

 nus have been enumerated, and some of thoSe are so alike. 



