EAST COAST MARINE SHELLS 



77 



GENUS RIMULA Defrance 1819 



Like Emarglnula but with slit 

 closed and forming a hole. 



RIMULA FRENULATA Dall . Apex small, sharp; 

 finely sculptured with radiating threads 

 and with finer ones between each pair; 

 sculpture running across not forming nod- 

 ules; interior glossy. Length 6.S5 mm. 

 Range 6-52 fathoms. 



A beautiful little shell. 



PI. 30, Fig. 9 



North Carolina to Florida Keys 



GENUS SUBEMARGINULA Blalnville 1825 

 (CHINK SHELLS) 



Rounded, oval shells; surface radi- 

 ally ribbed; notch short, continued upward 

 inside as a groove; muscle scar inside pe- 

 culiar, its ends recurved and pushed in- 

 ward in direction of apex cavity. 



SUBEMARGINULA EMARGINATA Blalnville. Chief 

 ribs ten, the three double in front the 

 strongest; interior and exterior white; 

 edge of shell with about thirty-five teeth 

 of various sizes; ends elevated. Length 

 25 mm. 



PI. 30, Fig. 6 



Florida Keys and West Indies 



SUBEMARGINULA OCTORADIATA Adams. Shell 

 conical, oval; apex inclined toward rear 

 and to the right side, slope at back 

 straight; eight evenly placed larger ribs, 

 eight lesser ribs and also, in large speci- 

 mens, smaller riblets; all of the ribs nod- 

 ulous; interior greenish, groove in front 

 narrow and deep; margin toothed. Length 

 24 mm. 



The ribs have no inclination to 

 double as in the following species. 



PI. 30, Fig. 7 



Florida Keys to the West Indies 



SUBEMARGINULA PUMILA Adams (S. rollandi 

 Fischer) . Shell small; anterior fissure 

 three times as long as wide; front slope 

 convex; twenty-two to twenty-eight radiat- 

 ing, often beaded, riblets; smaller riblets 

 between the latter; apex recurved, color 

 varying from white to green or pale flesh; 

 interior similarly colored but showing 

 white rays. Length 9.5 mm. 

 PI. 29, Fig. 16 



Fig. 40 



Puncturella princeps, 



5 mm. 



Southern Florida and the West In- 

 dies 



GENUS PUNCTURELLA Lowe 1827 



Shell conical, elevated, apex re- 

 curved; opening in front of apex and with 

 an elevated border inside; exterior surface 

 cancellated. 



PUNCTURELLA PRINCEPS Mighels (P. noachlna) . 



Shell decidedly conical, 

 bluish white; about 

 twenty-two ribs on sur- 

 /^l''>» face with, in addition, 

 \ smaller intermediate 

 i.7v»,- r w'/zi* ribs; diamond- shaped 

 y^^ ; '''^S slit in summit, com- 



; munlcating with interi- 

 .„ ■' or through a circular 



aperture; margin crenu- 

 lated. Length 5 mm. 

 This strange 

 little shell is often 

 taken from the stomachs 

 of fish. Range 25-310 fathoms. 

 Fig. 36 

 Labrador to North Carolina 



Family Stomatellldae 



Shell varying from spiral to de- 

 pressed, sometimes Haliotls shaped or non- 

 spiral and limpet form; interior of large 

 aperture pearly. 



GENUS STOMATELLA Lamarck 1819 

 (LITTLE MOUTH SHELLS) 



Shell oval, spire short; aperture 

 longer than wide; operculate. 



STOMATELLA PICTA Orbigny. A minute ear- 

 shaped shell; surface shining, many fine 

 unequal spiral threads which cut surface 

 into granules; flesh colored, spotted with 

 opaque white; columella white; whorls 2.5, 

 last large; aperture spotted inside. Great- 

 est length 4 mm. 



Dall and Simpson reported this from 

 the Florida Keys. 



PI. 30, Fig. 15 



Florida; Cuba; St. Thomas 



Family Scissurellidae 



Very minute shells, not pearly. 



