142 Mr. A. Adams on some Molluscous Animals 
sharp prominent keel, articulated with white and dark green. 
This angular ridge separates the hollow sides from the flat lower 
portion, which is of a dull pinkish white. The sole, or small 
anterior membranous portion situated in front of the head, is of. 
a pale white, and the broad circular expanded disk is marbled 
with olivaceous, the edges being prettily spotted with dark 
green and white. 
A favourite attitude is one in which the position of the animal 
in its tubular shell is reversed, and the disk of the foot applied | 
against the upper edge, the concave sides forming two hollow 
channels to conduct the water to the gills, thus performing the 
office of siphons. This beautiful creature is common along the 
shores of Manchuria and Japan, where it adheres to the tidal 
rocks. My examples were obtained from 7 fathoms’ water at 
Mososeki, in the Inland Sea or Seto-Uchi. The same species 
has recently been described by Dr. Dunker, in his ‘ Mollusea 
Japonica,’ as Serpulorbis imbricatus. 
Pilidium commodum, Midd. 
In a sandy bay of Saghaleen, near Cape Notoro, great masses 
of Laminaria were thrown up in heaps on the beach after a tre- 
mendous gale; and it was during an examination of the rich 
stores of shipwrecked and stranded animal remains that I found 
several specimens of what I believed to be an undescribed shell. 
Being at the time unacquainted with Middendorff’s Pilidiwm 
commodum, I named my shell Capulus depressus, under which 
name it is published in the ‘ Annals’ for 1860. 
According to Middendorff’s description, the animal does not 
differ from that of Capulus ; but perhaps the extremely depressed 
form of the shell may allow Pilidium to remain as a subgenus 
of Capulus. In the ‘Spitzbergen Mollusca’ of Otto Torrell 
(p. 88) it is stated that Prof. Lovén has named this shell Pilscus 
probus, alterig the name Pilidiwm because Prof. EK. Forbes had 
used it for Jothia; though why he should have altered the spe- 
cific name also is not stated. Puilidiwm of Forbes, however, or 
Tothia is the same as Lepeta of Gray; so that Pilidium of Mid- 
dendorff should still be employed for this northern Capulus. 
Hisinger, according to Torrell, described the same shell in his 
‘Lethzea Suecica’ as Capulus Hungaricus; and Torrell himself 
proposes to call it Piliseus commodus. 
Eburna japonica, Reeve. 
In this species the tentacles are ringed with red-brown, and 
speckled with light yellow ; and the siphon is spotted with yel- 
lowish white, and irregularly banded with red-brown lines. The 
foot (long, large, thick, and fleshy, like that of Buccinum) is 
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