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of a representative of fam. Bufonidae); 4) Oxyuris myriajjo- 

 dicola n. sp. and 5) Oxyuris leidyi n. sp. (from the intestine 

 of Polydesmus); 6) Oxyuris jiraeputialis n, sp. (from tlie 

 intestine of Bufo sp.); 7) Oxyuris megalocerca n. sp. (from 

 the intestine of Gecko); 8) Oxysorjia dogieli n. sp. (from 

 Bufo sp.); 9) Isacis multipapiUata n. sp, (from the intestine 

 of Ixdus sp.); 10) Physcdoptera britanica n. sp. (from Agama 

 sp.); 11) Diplntriaena sokoloivi n. sp. (from Hnlcyo7i senegaloides) 

 and 12) Angiostomum cliamaeleonis n. sp. (from the lungs of 

 Cliamaeho). 



The detailed investigation of the parasite Ascaris helicina 

 (Molin 1860) from the intestine of a crocodile leads to 

 the separation of this form from the old genus Ascaris L., 

 and I am placing it into a new genus named by me Trispiculasca- 

 ris, on account of the presence of a gubernaculum which, 

 as it is known, is always absent in the typical Ascaridae. 



One of the most remarkable parasites in the collection of 

 Dogiel and Sokolov is the representative of a new genus — 

 Amphibiophilus acanthocirratus n. g. n. sp. from the inte- 

 stine of an amphibian (fam. Ranidae). The oral capsule 

 of this parasite is built after the type of Amidostominn 

 (parasitic in birds), while the bursa copulatrix of the male 

 bears the character of that of Ankylostoma (parasitic in mammals). 



The new genus of Ascaridae — Orneoascaris chrysanthe- 

 moides from the intestine of amphibia (fam. Bufoni- 

 dae) is also interesting. It is characterized by the presence 

 of broad alae, and, especially, by the structure of the cuticle 

 at the caudal end of the male, which is of a very complica- 

 ted mosaic drawing; the caudal papillae of the male are of 

 a queer form resembling the crown of a double flower. 



The species of genus Oxyuris were especially abundantly 

 represented in the collection of Dogiel and Sokolov; out of 

 7 representatives of them 4 parasites were separated by me 

 into new species. In studying the Oxyuridae I paid special 

 attention to the structure of the oral organs, as this charac- 

 ter is to be of great importance in the systematic re-grou- 

 ping of the representatives of this genus, which often differ 

 from each other in generic, and not only specific characters. 



It is necessary also to mention the new species of genus 

 Isacis Lespes, Isacis multipapiUata n. sp., the investiga- 

 tion of which gave the means for forming a diagnosis of 



