40 
NATURAL HISTORY. 
[east. ZOOL. 
Table 16. The Top Shells ( Trochus ) and their allied genera; 
as the pyramid ( Pyramis ). The rosary ( Clangulus Pharaonicus ). The 
jujube berry ( Trochus Ziziphinus). The iris or rainbow eardrop 
( Cantherus Iris), from New Zealand. The button shell ( RoteUa 
lineolata). The strawberry ( Monodonta ). The gold button ( Livona 
aurea), which is peculiar for the light golden colour of the pearL 
The dolphin ( Delphinula ). The false ear shell ( Stomatetta and 
Stomatia ). 
Tables 17, 18. The true ear shell ( Haliotis ), as wrinkled ear 
(H. Midce ); the iris or rainbow ear (H. Iris); the slender ear 
(H. 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 ). 
Table 18. The nerites ( Nerita ). Fresh-water nerites ( Neritina ). 
The crowned nerites ( Clithon ), and the fresh- water boat shells ( Navi - 
cella). 
Table 18. The apple snails ( Ampullaria ). The reversed apple 
snails ( Lanistes ). The purple, or floating snail ( Ianthina ). 
Table 19. The nipple shell ( Natica ). The Venus’ ear ( Crypto - 
stoma). The winkle ( Littorina ), and other genera allied to them. 
The pagoda shell ( Pagodus ). The staircase shell (Solarium), so 
called on account of the ridge round the cavity in the axis or 
umbilicus resembling a well staircase. 
Table 20. The Fresh- water Clubs ( Melania ) ; the clubs ( Cerithium). 
Table 21. 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. The 
pond snails ( Paludina ). The worm shell ( Vermetus), which is like 
the tubes of serpulse. 
Table 22. The fool’s cap ( Capulus), and the Hipponyx 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 ( Trochita) 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 false 
limpets (. Lottia ) ; tooth shell ( Dentalium ). The Bubble Shells (Bulla), 
and the shelly plates found in the gizzard of some of the species. The 
rose-bud (Bullina). 
Tables 23,24. 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 
