306 NEW YORK STATE MUSEUM 



Fig. 



muscles and connecting with the mouth; 8 muscles aris- 

 ing in the anterobasal part and connecting with the 

 muscles of the olfactory tentacles; 9 muscles arising in 

 the anterobasal part and connecting with the mouth ; 11 

 muscular fibers from the buccal body to the lips; 12 

 muscles of the buccal body; 13 esophagus; 14 salivary 

 ducts. 



2 Buccal body turned back to show the muscles beneath: 

 1 broad oblique bands of muscles arising in the antero- 

 basal part and inserted in the extreme anterior part of 

 the animal ; 2 ocular tentacular muscles ; 3 olfactory ten- 

 tacular muscles; 4 muscles arising in the anterobasal 

 part of the animal, and inserted in the ocular tentacular 

 muscles; 5 muscles arising on the under side of the 

 buccal body and inserted in the lips; 6 oblique muscles 

 of the under side of the buccal body; 7 retractor mus- 

 cles of the buccal body; 8 retractor muscles; 9 pedal 

 sinus and bordering veins. 



PLATE 21 



The numbering of the horizontal lines corresponds to that of the figures. 



The same lettering refers to the same organ in all the figures. 



Transverse sections of Limas maximus, x3. 



An outline showing the position of the sections. 



The section, figure 1, was made at the place designated by 

 line 1, and so on to figure 12. 



salivary ducts; 0' salivary glands; 1 mantle; 2 shell 

 cavity; 3 shell; 4 kidney; 5 heart; 6 penis; 7 arteries; 8 

 receptaculum seminis; 9 uterine canal, spermatic duct 

 and albumen gland; 10 crop; 10' intestine; 10" eso- 

 phagus; 11 rectum near anus; 12 pulmonary vein; 13 

 respiratory orifice ; 14 pedal sinus ; 15 large lateral veins ; 

 16 smaller lateral veins; 17 veins contiguous to and 

 parallel with the pedal sinus; 18 digestive gland; 19 

 hermaphroditic duct; 20 ovotestes; 21 ocular tentacular 

 muscles; 22 cartilaginous cushion supporting radula; 

 22' radula. 



