NEW MAI.Lol'HAGA. 



loil 



and the rest of the intoptino arc vorv similar in the 

 others descrihed. 



Nitzscli (1874) rigures tlie alimentary canals of tiie f«tl- 

 lowing Piiilopterid s})ecies: JJucoj)/i(>ni.s fiisclcollis, b. 

 ocellatiLs^ and Lij}enriis jejunns. That of Dnco/t/mrns 

 fuscicollis differs in no e^^sential respect from those 

 forms already descrihed. In 1>. ucidUitos the o{jeniMy;s 

 of the pre- and postingluvial divisions of the cesopha- 

 gus are rather far removed from the nearer end of tiie 

 crop. The ventricnlus is very long and bent upon 

 itself, forining a loop. 



The genus Trichodedes (family Trichodectida- ) [(re- 

 sents a rather remarkable deviation from the other 

 Ischnoeeran forms in the shape and position of the 

 crop. As already mentioned, it is of the form of a 

 sack connected with the (esophagus some distance in 

 front of the ventricnlus by a narrow, more or less elon- 

 gated neck. In TrichodecteK (jeoinydis {\t\iite xi. fig. 10), 

 the crop is rather snuiller comparatively than in nm-t 

 of the IMiilopterid forms, being about two-third- the 

 length of the stonuioh. The neck is long and slender, 

 extending laterally from the oesophagus. The ventric- 

 ulus is large anteriorly, where it is produced into two 

 large cieca whicli are not constricted at their bases. 

 Posteriorly the stomach becomes narrowed and nnikes 

 an abrupt bend in llic direction of the cro|t. After 

 running a short distance in this direction as a nannw 

 tube it passes into the intestine. This division of the 

 alimentary canal goes backward from the midgut, form- 

 ing a right angle with the posterior tubular part of the lat- 

 ter. The rectum is wide anteriorly, where it {tresents si.x 

 glands as in the other families. In a Tricl<()decte!i from 

 a horse the crop (plate xi, lig. i.») is the same as in T. 

 geonii/dis, but is comparatively even a little Nmaller; 



