The Miceoscope. 



343 



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/jm small processes (Fig. 3, pr). The alimentary 



Im-^ _ _^ canal is a straight tube, traversing the whole 



length of the body cavity. The small mouth, 

 which opens anteriorly, is surrounded by a 

 horny capsixle (Figs. 1 and 2, m). The phar- 

 ynx (ph.) has muscular walls, with transverse 

 strice, and leads into a narrow oesophagus (ce). 

 The gizzard (g) is round and very thick-walled, 

 muscular stride radiating from the small central 

 cavity. The remainder of the digestive tube 

 consists of a long, hind-gut or intestine (Fig. 3, 

 i) which occupies the greater portion of the 

 body. The anterior portion of this organ is 

 broad and much serrulated ; near the repro- 

 ductive system it becomes narrow, and passes 

 to one side. A short rectum leads to the 

 anus, which opens near the root of the tail. The reproductive 

 organ of the male is a long, broad testis, which is bent upon itself 

 at its upper portion, and opens by a very short vas deferens at the 

 anus (Fig. 3, sp.). Two conspicuous spicula, shaped like the letter 

 S, and contained in sacs, are situated at each side of the vas deferens 

 and open into it ; they act as claspers during the sexual process. In 



:>i<ii 



the female the generative opening is situated a little behind the 

 middle of the body. This opening leads into an oval chamber, and 

 the broad pouch. The large uterus, or broad pouch, seems more like 

 a cavity hollowed out in the body, than a chamber having definite 



