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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 laminae, some obliquely 

 inwards, and join those of opposite sides, in a median tendi- 

 nous raphe, which extends the whole length of this flat surface 

 of the truidi ; this muscular lamina is not so red or longitudi- 

 nal as tiiose on the front and sides; this lamina may also he 



