EAST COAST MARINE SHELLS 



131 



18 to 25 mm. 



Florida Keys to Mexico 



MARGINELLA SUCCINEA Conrad (M. nitlda 

 Hinds) . A thin pellucid form, white or 

 amber color, spire lengthened. 



It has been found living in dead 

 horseshoe crabs at Gulfport, Florida, 

 Length 17 mm. 



PI.. 50, Fig. 11 



Fernandina, Florida to West Indies 



MARGINELLA FAUNA Sowerby. Shell oval, pale 

 red, spire short; columella with four ob- 

 lique plaits; outer lip incurved in middle. 

 Length 8-12 mm. 



PI. 50, Fig. 12 



Florida Keys and West Indies 



MARGINELLA VELIE Pilsbry. Spire high; aper- 

 ture wide; four plaits upon columella; 

 outer lip well thickened; color white or 

 yellowish. Length 15 mm., breadth 7 mm. 



It has been reported from Captiva 

 and Sanibel, Florida. 



PI. 49, Fig. 10 



West Coast of Florida 



Family Olividae 



Brilliantly polished shells, oblong, 

 subcylindrical in shape; final whorl cover- 

 ing most of the previous ones, spire short; 

 aperture long, a little dilated in front; 

 columella vertical, more or less folded; 

 lip simple, thick, no reflection or teeth; 

 notch above becoming a canal at suture; 

 canal at base of shell abbreviated but dis- 

 tinct; operculum absent. 



GENUS OLIVA Bruguiere 1789 



OLIVA RETICULARIS Lamarck. A slender shell 

 which is swollen a little in the middle; 

 spire somewhat raised; ridges on columella 

 many and strong. Upon the whitish-ground 

 color there are faint purplish-brown retic- 

 ulations, often as white triangular spots. 

 A variety has two darker bands near the 

 middle of the final whorl and groups of 

 brownish lines near the suture. Length 35- 

 50 mm. 



Zigzag longitudinal markings of 

 pink and brown are characteristic; fascicu- 

 lations (pointed markings) of the same col- 

 or around the suture. Some specimens are 

 almost uniformly covered with chestnut 



brown. The aperture is white. Length 35- 

 58 mm. 



No specimens have been taken alive 

 north of the Florida Keys. 



PI. 51, Fig. 18 



PI. 50, Fig. 23 



Florida Keys and West Indies 



OLIVA RETICULARIS OLORINELLA Duclos. A 

 color variety which is uniformly light yel- 

 low. 



Florida Keys and Bahamas 



OLIVA RETICULARIS BOLLINGI Clench. A larger 

 and heavier shell than the typical form, 

 color markings stronger, ground color not 

 as white or creamy. Length 61 mm. 



The holotype was taken in crab- 

 traps off Miami in about 200 feet of water. 



PI. 51, Fig. 9 



Off Miami, Florida 



OLIVA SAYANA Ravenel (O. lltterata Lamarck). 

 Spire produced; usual zigzag markings and 

 sutural ornamentations, also two bands of 

 hieroglyphic-like markings. Length 50-62 

 mm. 



A wider shell than 0. reticularis. 

 It lives in large numbers at low-tide mark 

 upon the west Florida beaches but colonies 

 are often difficult to locate. Freak 

 shells are shown on PI. 44. 



PI. 50, Fig. 9 



PI. 44, Figs. 6, 12 



PI. 64, Figs. 8, 8g 



North Carolina to Texas 



OLIVA SAYANA CITRINA Johnson. The uniform- 

 ly yellow form. 



Gulf coast of Florida 



GENUS OLIVELLA Swalnson 1840 



Distinguished from Oliva by the 

 small size and more developed spire; more 

 readily separated by the presence of a 

 large thin, horny operculum which is ab- 

 sent in Oliva proper. 



These little shells live in sandy 

 stations, often burying below the surface. 

 Their presence is usually indicated by a 

 track on the surface of a tidal flat. 



OLIVELLA FLORALIA D clos. Shell highly 

 polished, much narrower than 0. jaspidea 

 and 0. nivea; spire tipped with dark brown 

 or yellow, also with a distant brown zigzag 



