Plate 19 

 ATLANTIC COAST UNIVALVES 



a. ANGULATE PERIWINKLE, Littonna 



angulifern Lam., 1 inch (Florida and 

 West Indies), p. 133. 



b. COMMON PERIWINKLE, Littonna lit- 



torea L., 1 inch (Labrador to New 

 Jersey; Europe), p. 132. 



c. MARSH PERIWINKLE, Littonna irrorata 



Say, 1 inch (New York to Texas), p. 132. 



d. NORTHERN ROUGH PERIWINKLE, 



Littoriua saxntilis Olivi, '2 inch (Arctic 

 New Jersey), p. 133. 



e. ZEBRA PERIWINKLE, Littorina ziczac 



Gmelin, 1 inch (Florida to Texas and 

 south), p. 132. 



L NORTHERN YELLOW PERIWINKLE, 

 Littorina obtnsata Linne. '2 inch 

 (Arctic to New Jersey), p. 133. 



g. BEADED PERIWINKLE, Tectarius miiri- 

 catus Linne, 1 inch (Florida Keys, 

 south), p. 134. 



h. FALSE PRICKLY-WINKLE, Ecliininus 

 nodulosus Pfr., % inch (Florida Keys, 

 south), p. 135. 



i. COMMON PRICKLY-WINKLE, Nodilit- 

 torina tuberculata Mke., j^ inch (Flo- 

 rida Keys, south), p. 134. 



j. SPOTTED PERIWINKLE, Littorina 

 rneleagris Pot. and Mich., V.s incli 

 (Florida Keys, south). 



k. DWARF BROWN PERIWINKLE, Litto- 

 rina mespilhini Miihlfeld, y^ inch (Flo- 

 rida Keys, south), p. 133. 



1. STOCKY CERITH, CeritJiium literatum 

 Born, I inch (Southeastern Florida and 

 West Indies), p. 154. 



m. FLY-SPECKED CERITH, Cerithium mus- 

 caruni Say, 1 inch (Florida and West 

 Indies), p. 154. 



n. FLORIDA CERITH, Cerithium florida- 

 num Morch, \]/^ inches (North Caro- 

 lina to Florida), p. 153. 



o. DWARF CERITH, Cerithium variabile 

 C. B. Adams, Yi inch (Florida to Texas, 

 south), p. 154. 



p. MIDDLE-SPINED CERITH, Cerithium 

 algicola, C. B. Adams, 1 inch (Florida 

 and West Indies), p. 154. 



q. IVORY CERITH, Cerithium eburneum 

 Brug., 1 inch (Southeastern Florida and 

 West Indies), p. 154. 



r. VARIABLE BITTIUM, Bittium variiim 

 Pfr., y^ inch (Maryland to Texas and 

 Mexico), p. 155. 



s. FALSE CERITH, Batillaria minima Gme- 

 lin, 3^ inch (Florida and West Indies), 

 p. 153. 



t. PLICATE HORN SHELL, Cerithidea 

 pliculosa Menke, 1 inch (Florida to 

 Texas, south-, p. 152. 



u. COSTATE HORN SHELL, Cerithidea 

 costata Da Costa, Ij inch (West Florida, 

 south , p. 152. 



V. GREEN'S MINIATURE CERITH, Ceri- 

 thiopsis greeni C. B. Adams, ]4, inch 

 (Massachusetts to West Indies, p. 157. 



w. AWL MINIATURE CERITH, Cerithiop- 

 sis subulata Montagu, Y inch (Massa- 

 chusetts to West Indies , p. 157. 



X. LADDER HORN SHELL, Cerithidea 

 scalarijormis Say, 1 inch (South C; ro- 

 lina to Florida, Cuba), p. 152. 



y. BLACK-LINED TRIFORA, Triphora 

 nigrocincta C. B. Adams, Y inch (Massa- 

 chusetts, south), p. 159. 



z. BEAUTIFUL TRIFORA, Triphora pul- 

 chella C. B. Adams, 34 inch (Florida, 

 south), p. 159. 



zz. MOTTLED TRIFORA, Triphora decorata 

 C. B. Adams, Yi inch (Florida and West 

 Indies), p. 159. 



