CONCHIFERA. 
493 
Fig. 267 represents the animal of Panopea glycimerts, as 
seen on the removal of the left valve and thin part of the 
mantle. It was obtained on the 
coast of Sicily, and presented to 
the Gloucester Museum by Cap- 
tain Guise. 
Mantle and siphons coyered 
with thick, dark, wrinkled epi- 
dermis; siphons united, thick, 
contractile ; pedal orifice small, 
in the middle of the anterior 
gape; foot small (/), body oval 
(0), with a prominent heel; 
pallial muscle (m) continuous; 
with aceep siphonal inflection 
(s); lips broad and plain, palpi 
triangular, deeply plaited (¢); 
gills unequal (much contracted 
in spirit), reaching the com- 
mencement of the siphons; 
inner gills prolonged between 
the palpi, plaits in pairs, each 
lamina being composed of yvas- 
cular loops arranged side by 
side; margin grooved, dorsal 
border of inner lamina unat- 
tached; outer gills shorter and 
narrower, formed of a single 
series of branchial loops placed 
one behind the other, dorsal 
border wide and fixed. 
Distribution, 11 species. 
Northern Seas, Mediterranean, 
Cape, Australia, New Zealand, 
Patagonia. Low water — 90 
fathoms. 
Fossil, 140 species. Inferior 
Oolite—. United States, Hurope, 
India. 
ig, 267. Panopea Glycumerss 
2 The size of the original. 
a, a’, adductor muscles; p, posterior podz! 
muscle; 7, renal organ. 
GLycimERIS, Lamarck. 
Litymology, glukus, sweet, meris, bitter. 
Type, G. siliqua, Pl. XXIT., Fig. 14 and Fig. 268, 
Synonym, Cyrtodaria, Daud. 
