OS WO rae 
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on each side by a row of rough tubercles : the whole is covered 
by a coarse, hard skin; this being removed, the proper struc- 
ture comes into view. The proboscis consists of two long 
tubes separated by a median septum ; these tubes open above 
into the nose, and below at the extremity of the trunk; they 
are somewhat contracted at each of their extremities ; they are 
composed of a whitish membrane, not very vascular or sensi- 
tive, covered by a dense elastic tissue, which preserves their 
calibre ; inferiorly the skin is continuous with the lining mem- 
brane. The point of the proboscis is worthy of attention, a 
thick lip surrounds it, with a groove below, and a thumb-like 
projection above; this little conical appendix enjoys free mo- 
tion, and can be brought into contact with every part of the 
border. The skin being removed from the proboscis, the 
muscular tissue which composes the principal portion of the 
entire mass is exposed ; this is arranged, partly in superficial 
strata, and partly in deeper seated, radiating, and decussating 
fasciculi. The first layer consists of strong, red, longitudinal 
fasciculi, which extend, from the frontal and nasal bones, the 
entire length of the organ; some of the fasciculi are short, 
and end between two others; some are intersected by tendi- 
nous lines, which adhere to the integuments: on each side of 
the trunk also are seen longitudinal muscles extending down- 
wards from the superior maxillary bones and commissures of 
the lips. As these fasciculi descend they spread out obliquely, 
some forwards, others backwards, or to the under surface; 
some intermingle with the other superficial muscles, others 
are inserted into the tendinous interlacements of the deeper 
muscles, and some into the skin; the posterior or flat surface 
also is covered by muscular fibres, which take a decided oblique 
course, attached above to the intermaxillary bones in front of 
the mouth ; they descend in different laminz, some obliquely 
___ inwards, and join those of opposite sides, in a median tendi- 
nous raphé, which extends the whole length of this flat surface 
of the trunk; this muscular lamina is not so red or longitudi- 
nal as those on the front and sides; this lamina may also be 
