AND HABITS OF MARINE TESTACEOUS MOLLUSCA. 
515 
l. The lingual papilla. (The insertion of its retractor muscle is seen under- 
neath it in fig. 11.) 
m. The point of the tongue. 
n. The soft lips. 
Buccinum undatum. 
Fig. 14. The trunk, in situ. 
Fig. 15. The trunk developed. 
Fig. 16. Upper part of the tongue, and its muscles. 
Fig. 1 7- Under view. 
Fig. 18. Magnified extremity of the tongue. 
Fig. 19. Oblique muscles of the tongue. 
Fig. 20. The base of the tongue. 
a. The base. 
b. Its crura. 
c. Its transverse muscular bands. 
d. The great annular muscle. 
e. The funnel-shaped muscle which projects the tongue. 
f. The muscle of the sheath. 
g. The muscles of the point of the tongue. 
h. The external oblique muscles. 
i. The descending oblique. 
k. The ascending oblique. 
/. One of the deep-seated oblique muscles. 
m. The sheath of the tongue. 
n. The oesophagus. 
o. Origin of the membranous tube which contains the tongue. 
Of these, a, b , c, e, g , h, k and l, are not at all noticed by Cuvier, and the 
nature of f is mistaken. 
Fig. 6, 7? and 1 8, are magnified ; and 4, and 1 1 , are a little larger than 
natural. The others are all of the size of the specimens from which they 
were copied. 
