48 



EAST COAST MARINE SHELLS 



orange suffusion." In early days It was 

 called "The Apricot." The area of the 

 rudimentary teeth is indicated outside by 

 a peculiar extension of the shell with 

 sharp diagonal fold upon opposide side. 

 Diam. 1.5-2 inches. 



It is taken in moderate depths and 

 is easily obtainable upon tidal flats of 

 bays and protected waters. 



PI. 15, Fig. 7 



Florida and West Indies 



LORIPINUS SCHRAMMI Crosse (L. phillppiana 

 of authors, not Reeve). A large, rotund, 

 chalky-white shell. It is more inflated, 

 larger, with smaller lunule than L. 

 chrysostoma with which it is often con- 

 fused. Diam. 3 inches. 



Examples have been reported from 

 Sanibel, Florida. 



PI. 15, Fig. 4 



PI. 16, Fig. 3 



North Carolina to Gulf of Mexico 



GENOS MYRTAEA Turton 1822 



UYRTAEA LENS Verrill and Smith. Shell 

 much compressed; well separated concen- 

 tric lines becoming raised near fold; ex- 

 terior dull-, often with thin greenish epi- 

 dermis; lunule deeply excavated and form- 

 ing a notch in margin; cardinal teeth de- 

 generate. Length 10.5 mm. Depth range 

 50-464 fathoms. 



PI. 16, Fig. 6 



PI. 11, Fig. 10 



Cape Cod, Massachusetts to Brazil 



Family Leptonidae 



GENUS ROCHEFORTIA Velain 1876; 

 Mysella Angas 1877 



ROCHEFORTIA PLANDLATA Stlmpson (Kellla 

 rubra Gould not Montagu) . Shell thick, 

 minute; umbones prominent and touching 

 each other; lunule in front distinct; an- 

 terior end white with thin purple epider- 

 mis. Length 4 mm. Range 0-48 fathoms. 



When containing the dried remains 

 of the animal the shell has a ruddy tinge 

 and pale brown epidermis which are lost in 

 beach valves. 



PI. 24, Fig. 7 



Nova Scotia to Texas 



GENUS MONTACUTA Turton 1822 



MONTACUTA FLORIDANA Dall. 



PI. 4, Fig. 7 



West Coast of Florida 



GENUS KELLIA Turton 1822; 

 Lasea Leach 1827 



All the known forms are nestlers, 

 adhering by a byssus to barnacles, cal- 

 careous algae and similar organisms. The 

 young Kellla are long retained within the 

 parent shell. 



KELLIA RUBRA Montagu. Varying from pale 

 greenish yellow to purplish red. Under a 

 microscope the epidermis appears very 

 coarse. No two individuals exhibit the 

 same characters in the teeth. In the left 

 valve there is a minute "cardinal" tooth 

 and two diverging laminae; in the right 

 valve a similar "cardinal" and each side a 

 pair of laminae between which the single 

 teeth of the opposite valve are received, 

 the so-called "cardinal" often being absent. 

 Height 3 mm. 



This very variable shell has long 

 been known from Bermuda, also southern 

 California and Europe. At the Lake Worth 

 Inlet, Florida it was foimd nestling in 

 barnacles. It may have been carried to 

 the Pacific by ocean currents when a pas- 

 sage across the American Isthmus was open. 



PI. 20, Fig. 9 



Florida; Bermuda; Europe 



Family Cardlidae 



Valves with serrated (toothed) mar- 

 gins, frequently gaping behind; hinge teeth 

 arched (Cyclodont) , hinge plate obscure or 

 undeveloped; ligament external and posteri- 

 or. 



GENUS CARDIUM Linn§ 1758 (COCKLE SHELLS) 



SUBGENUS TRACHYCARDIUM Morch 1853 



CARDIUM ISOCARDIUM Linni. Narrow Cockle. 

 Shell of elongated heart-shape; twenty- 

 seven to thirty radiating ribs; brown, 

 stained with darker shades; interior salmon 

 color or piirplish pink. Height 3 inches; 

 breadth 2.75 inches. 



