86 



EAST COAST MARINE SHELLS 



the float is punctured the animal supposed- 

 ly drops from its host, violet-colored 

 Velellae and similar soft animals, and is 

 washed ashore. 



PI. 33, Fig. 1 



Nantucket, Massachusetts to the 



West Indies 



JANTHINA EXIGUA Lamarck. Upper portion of 

 whorls slightly flattened, blunt peripheral 

 angle, surface closely striate; decided 

 notch on outer lip, light violet color, 

 banded at suture. Diameter 12-18 mm. 



Apparently lives in the Gulf Stream 

 off Florida. Quite common upon the east 

 coast beaches, freshly dead. 



PI. 33, Fig. 2 



Florida, Pacific, etc. 



JANTHINA GLOBOSA Swainson. A rounded, 

 whitish shell, dark violet toward base; 

 spire short; whorls rounded. Diameter 12 

 mm. 



PI. 33, Fig. 3 



Florida and most warm seas 



Family Melanellidae 



Small shells, usually elongated, 

 shining, polished; spire often curved to 

 one side or distorted; outer lip simple, 

 inner margin partly thickened. Mouth of 

 animal without jaw or radula. 



These mollusks are generally para- 

 sitic, living upon sea urchins and similar 

 organisms. On account of their small size 

 and lack of sculpture it is somewhat diffi- 

 cult to separate the various species. 



GENUS MELANELLA Bowdlch 1822 



Many-whorled, polished shells with 

 corneous operculum. 



MELANELLA CONOIDEA Kurtz. A conical white 

 shell with about thirteen whorls. Length 

 9 mm. 



PI. 33, Fig. 10 



Cape Hatteras, North Carolina to 



Florida 



MELANELLA INTERMEDIA Cantralne. Rather 

 solid, smooth, semlpellucid, white touched 

 with light brown, whorls thirteen, aperture 

 narrow. Length 7.5 mm. 



PI. 33, Fig. 11 



PI. 71, Fig. 14 



New Jersey to West Indies; Europe 



MELANELLA FDSUS Dall. A deep-water species 

 included for comparative purposes. 



PI. 33, Fig. 9 



Off Havana Light, Cuba 



MELANELLA SUBCARINATA Orblgny. Shell 

 pyramidal; whorls eight, flat, the last 

 bluntly carinated; suture margined. Length 

 3. 5 mm. 



PI. 42, Fig. 11 



North Carolina to Florida and West 



Indies 



GENUS LIOSTRACA H. and A. Adams 1853 



Shell minute, usually long and nar- 

 row, whorls a little flattened on side, 

 polished, often banded with color, aper- 

 ture narrow. Inner lip thickened and slight- 

 ly curved in center, outer lip sharp. 



LIOSTRACA ACUTA Sowerby. Shell elongated, 

 dull white, twelve rather flattened whorls, 

 aperture narrow; apex blunt. Length 8 mm. 

 Range 2-100 fathoms. (Marco, Florida 2 

 fathoms.) 



PI. 33, Fig. 15 



Off North Carolina to West Indies 



LIOSTRACA BILINEATA Alder. A narrow thin 

 shell with a pair of bands in center of 

 whorl and an indistinct one below suture; 

 some examples with a blotch of color at 

 base. Length 8 mm. 



PI. 33, Fig. 12 



Cape Hatteras, North Carolina to 



West Indies; Europe 



LIOSTRACA HEMPHILLII Dall. Length 3 mm. 

 PI. 68, Fig, 11 

 Cedar Keys to Marco, Florida 



GENUS STYLIFER Broderlp 1832 



Shell almost transparent, smooth, 

 polished, apex sharp, often bent; inner lip 

 smooth, outer slightly curved in center, no 

 operculum. 



Parasitic upon sea urchins. 



STYLIFER STIMPSONII Verrill. A white, 

 broad shell with a short spire and only 

 four to five whorls, the last of generous 

 size and with a revolving cut line Just be- 

 low the suture. Length 3.75 mm. Depth 

 range in the north 13-60 fathoms. 



PI. 33, Fig, 4 



George's Bank southward to Florida 



Keys 



