150 



MANUAL OP THE MOLLUSCA. 





Fossil, 25 sp. Carb. ? oolites—, Brit., France. 



Siih-genera. Piipillia, Gray. F. apertui'a, Bom. ( = hiantula, Lam.) 

 Shell smooth, sim'ouuded by a sharp white edge ; perforation very lai-ge. 

 Distr., S. Africa. 



Fissurellid(Ba, D'Orb. F. hiatula. Lam. (=megatrema, D'Orb.) Shell 

 cancellated ; covered by the mantle of the animal. 3 sp. Cape, Tasmania. 



{Macroschisrna, Sw.) F. macroschisma. PI. XL, fig. 2. Anal aperture 

 close to i]it posterior margin of the shell. The animal is so much larger than 

 its shell, as to be compared to the testacelle by j\Ir. Cimiing. Distr., Philip- 

 pines, Swan river. 



Lucapina, Gray. F. elegans. Gray (=aperta, Sby.). Shell white, can- 

 cellated, margin crenulated ; covered by the reflected mantle. 3 sp. California. 



PUNCTURELLA, Lowe. 



Syn., cemoria. Leach. Diadora, Gray. i 



Type, P. noachina. PI. XL, fig. 3. *| 



Shell conical, elevated, with the apex recurved ; perforation in front of the ', 



apex, with a raised border internally ; surface cancellated. i 



Bistr., 2 sp. Greenland, Boreal America, Norway, N. Brit, Tierra-del- j 



fuego. In 20— 100 fathoms water. J 



Fossil, in the glacial formations of N. Brit. I \ 



RiMULA, Defrance. ^ 



^^'^7^., diminutive of n?K(^, a fissure. (Syn., Rimidaria.) 1 



Uecent type, R. BlainviUii. PL XL, fig. 4. -i 



Shell thin and cancellated, with a perforation near the anterior marsin. ; 

 Bistr., several sp. found on sandy mud at low^-water, or dredged in from 

 10 — 25 fms. Philippines (Cuming). - ,,; 



Fossil, 3 sp. Bath oolite — coral-rag. Brit., France. :j,| 



Emarginula, Lam. |i 



Etym., dimunitive of emarginata, notched. < J 



Type, E. reticulata. PI. XL, figs. 5, 6. i 



Shell oval, conical, elevated, wdth the apex recurved ; sm-face cancellated ; 

 anterior margin notched. Muscular impression with recurved points. The I 

 nucleus (or sheU of the fry) is spiral, and resembles scissurella. The anterior 

 slit is very variable in extent. The animal of Emarginula (and also of punc- 

 turella; has an isolated cirrus on the back of the foot, perhaps representing 

 the operculigerous lobe (Forbes). Lingual dentition; median teeth sub- j 

 quadrate ; laterals 4, oblong, imbricated ; uncini about 60, the first large and 

 thick, with a lobed hook, the rest linear, with serrulated hooks (Loven). , 



Bistr., 26 sp. W. Indies, Brit., Norway, Philippines, Australia. Range i 

 from low-water to 90 fathoms. 



Fossil, 40 sp. Trias — . Brit., France. i 



i 



