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Fig. G. The under surface of a Brittle Star. Ophiothrix. 
Fig. 7. The side view of two jaws with their teeth, the space between 
leads to the stomach above and mouth below, in a small Sand 
Star, e = teeth ; d = jaw. 
Fig. 8 . "Water canal and nerves of arm, removed from the fibrous canal 
or sheath, x = a plexus of nerve fibres on the water tube 5 y = 
water tube ; s = a nerve on a portion of the water tube. 
Magnified with a quarter-inch object glass. 
Fig. 9. An oblique view of the jaws and other plates of the mouth after 
Lyman 5 d — jaw ; c » side mouth shields ; b = mouth shield ; 
mp = mouth papillae ; e = teeth ; e p = jaw plate. The upper 
and lower tentacles of the angle are indicated by dotted lines, 
and their scales are at their exit from the sides of the jaw. 
Fig. 10. The relative position of the mouth shield and the generative slit ; 
g = slit ; c » side mouth shield ; b = mouth shield. 
