66 Marine Shells of the Western Coast of Florida 



lunule; sculpture of growth lines; hinge edentulous; ligament bright 

 scarlet in fresh specimens; margins smooth. 

 Inhabits sandy bottom at moderate depths. 



Anodoiltia philippiailU (Reeve) {Loripinus schrammi Crosse) PI. 12, fig. 69 



Alt., 70; length, 80; diam., 55 mm. Shell white, globose, brown- 

 ish periostracum; umbos rounded, in contact, sometimes worn; strong, 

 coarse, concentric growth lines; hinge edentulous, ligament strong, 

 brown; interior surface of valves rough, anterior muscular impression 

 transversely elongate; margins smooth. 



Inhabits moderate depths. 



Genus CODAKIA Scopoli. 1777 



Subgenus CTENA Morch, 1861 



Codakia orl»iculata''i (Montagu) PI. 11, fig. 68 



Alt., 11; length, 12 mm. Shell small, white, obliquely rounded — 

 not globose, thin periostracum; lunule small; umbos in contact; 

 sculpture of numerous radiating ribs, some bifid, and some inter- 

 calation of riblets near margin; fine concentric lines and coarser 

 growth lines cross ribs; small cardinal and lateral teeth. 



A shallow water species, found in sand. 



Family LElTONIDAEf- 



Mollusks of the family Leptonidae have small shells. They are 

 usually thin and somewhat translucent, equivalve, with a tissue- 

 like periostracum. Most of its genera are viviparous. 



Genus ERYCINA Lamarck, 1806 

 Erjcina-'3 floridana Vanatta PI. 12, figs. 70a, b 



Alt., 5.25; length, 7.5; diam., 2 mm. Shell small and symmetri- 

 cal, white, translucent and fragile; flattened, equivalve, subequi- 

 lateral; umbos sharp, small but distinct; anterior and posterior 

 margins evenly rounded, dorsal margin slightly convex, ventral 

 margin almost straight; concentric sculpture of delicate growth lines 

 with coarser lines at intervals; hinge has small fossette below umbos, 



"1 Lat., orhis, orb, rounded. 

 "- Gr., leptos, small, delicate. 

 "^ Erycina, a name ifor Venus. 



