268 ILLINOIS BIOLOGICAL MONOGRAPHS [268 



OOCHORISTICA CRYPTOBOTHRIUM (von Linstow) La Rue 



1906 : Ichthyotaenia cryptobothrium von Linstow 1906 :185 

 1911 : Oochoristica cryptobothria La Rue 1911 :481 



Under the name of Ichthyotaenia cryptobothrium von Linstow 

 (1906) described a cestode from the intestine of a tree-snake, Chrysope- 

 lea ornata Russell, Kurunegala. La Rue (1911) stated, but without 

 assigning reasons therefor, that this species did not belong in the genus 

 Ichthyotaenia or Proteocephalus but in the genus Oochoristica Liihe. 



A careful examination of von Linstow 's description and figures 

 shows that this species cannot belong to the Proteocephalidae. The 

 position of the vitellaria in the Proteocephalidae as, indeed, in the whole 

 order of the Tetraphyllidea is lateral, the vitellaria extending nearly 

 the full length of the proglottid. In this species the vitellaria are 

 globular masses lying just posterior to the ovary. This relation occurs 

 in the Cyclophyllidea. Species of Oochoristica Liihe show this relation 

 and since this genus includes other species of cestodes parasitic in snakes 

 it seems probable that von Linstow 's species belongs here. La Rue 

 (1911) therefore proposed for it the specific name Oochoristica crypto- 

 bothria (von Linstow) La Rue. The specific name should end in 

 "ium" not "ia" as he made it. 



Unless the invaginated or infolded condition of the head is a con- 

 stant feature it can have neither generic nor specific importance. Ap- 

 parently not enough is known concerning the heads of this species to 

 establish the value of this condition as a diagnostic character. 



MONTICELLIA CORYPHICEPHALA (Monticelli) La Rue 

 [Figs. 94-96, 132, 181, 186] 



1891 

 1894 

 1896 

 1900 

 1911 



Tetracotylus coryphicephala Monticelli 1891 :151-174 



Ichthyotaenia coryphicephala Lonnberg 1894:803 



Ichthyotaenia coryphicephala Riggenbach 1896 :267 



Ichthyotaenia coryphicephala Braun 1894-1900:1680-1681 



Monticellia coryphicephala La Rue 1911 :474 



Specific Diagnosis: Characters of genus. Head dilated, somewhat 

 triangular or globose, when seen from the front swollen, sub-quadrate, 



