NATURAL HISTORY. 
38 
[east. zool. 
Table 17. The Top Shells ( Trochus) and their allied genera; as 
the pyramid (Puramis). The rosary ( Clangulus Pharaonicus ). The 
jujube berry ( Trochus Ziziphorus). The iris or rainbow eardrop 
(Cantherus Iris), from New Zealand. The button shell (Rotella 
lineolata ). The strawberry ( Monodonta ). The gold button (Livona 
aurea), which is peculiar for the light golden colour of the pearl. 
The dolphin (Delphinula). 
Table 18. The false ear shell (Stomatella and Stomatia). The 
true ear shell ( Haliotis), as wrinkled ear (H. Midce); the iris or 
rainbow ear (H. Iris); the slender ear (II. Asinina); the double 
ribbed ear (Padollus). The slit limpet (Emarginula). The shield 
shell (Parmophorus). The key-hole limpet, or mask (Fissurella). 
The long-holed limpet (Machrochisma). The tooth shells (Denta- 
lium). The false patellas (Lottia), from South America. The nerites 
( Nerita ). Fresh-water nerites (Neritina). The crowned nerites 
( Clithon), and the fresh-water boat shells (Navicella). 
Table 19. The apple snails ( Ampullar ia). The reversed apple 
snails (Lanistes). The purple, or floating snail (Ianthina). The 
nipple shell (Natica). 
Table 20. The Venus’ ear (Cryptostoma). The winkle (Lit- 
torina), and other genera allied to them. The pagoda shell (Pa- 
godus). The staircase shell (Solarium), so called on account of 
the ridge round the cavity in the axis or umbilicus resembling a 
well staircase. The screw ( Turritella), as the press screw ( T. bicari - 
nata). The milk shell (Eulima). The ladder shell (Scalaria), often 
called by the Dutch name, Wentletrap, signifying a winding ladder; 
they were formerly very rare, but are now brought from China. 
Table 21. The Fresh-water Clubs (Melania); the clubs ( Ceri- 
thium); and the pond snails (Paludina). 
Table 22. The worm shell ( Vermeius), which is like the tubes of 
serpulas. The fool’s cap ( Capulus), and the Hipponvx with its 
shelly under valve, which has caused it to be mistaken for a bivalve 
shell. The slipper shell ( Crepidula). The cup and saucer limpet 
(Dispotea ). The Trochus-like limpet ( Trochila) and the Neptune’s 
cap, which has a cup-shaped under valve. The carrier (Phorus), 
which has the peculiarity of attaching to the outer surface of its 
shell, as it enlarges in size, stones, fragments of other shells, coral, and 
other marine substances, from whence it has been called respec¬ 
tively the “ Conchologist,” and the “ Mineralogist,” as shell or mineral 
preponderated. Some of the species have this habit only in an early 
stage, others retain it during the whole period of their existence; 
some have the margin of the whorls expanded out into a broad disk, 
others have this part furnished with a series of long tubular processes 
like the rays of the sun, hence the name of Sun Carriers. The Bubble 
Shells (Bulla), and the shelly plates found in the gizzard of some of the 
species. The rose-bud (Bullina). 
Table 23. The horny shells found under the skin of the sea hares 
(Aplysia), and the shelly blade bone shell of Dolabella, from the In¬ 
dian seas. The very fragile and thin glassy nautilus ( Carinaria'), and 
the different species of paper nautilus or Argonauts. The poetic ac¬ 
count of the animal usually found in this shell using its dilated arms 
