CESTODABIA 467 



linidea than these are from the merozoan Cestodes. How- 

 ever, I concede that it is possible that this conclusion may prove 

 to be the correct one and that, as several authors have 

 supposed, the ' Cestodaria ' may be polyphyletic in origin. 



On an Immature Caryophyllaeus sp. from the Intestine 

 OF Auchenoglanis occidentalis, Cuv. and Val., 1840, 



I possess a single specimen of a species of Caryophyllaeus 

 (PL 25, fig. 31) which is immature and which was found in the 

 intestine of the Siluroid Auchenoglanis occidentalis 

 at Khartoum, Anglo-Egyptian Sudan. The specimen measures 

 2 mm. in length and about 0-5 mm. in maximum breadth 

 (posteriorly). The body is relatively thick and has the wrinkled 

 appearance shown in PI. 25, fig. 32. I cut this specimen into 

 horizontal longitudinal sections and discovered that its internal 

 structure was on the same general plan as that of C. fili- 

 formis. The ovary and vitellaria were still rudimentary, 

 though the uterus, vas deferens, and their openings were well 

 defined. The testes were not fully developed. Apparently the 

 vagina was convoluted in form and not straight as is usual, 

 and it was not easily distinguishable in sections from the uterus. 



In conclusion, I wish to express my thanks to Dr. Andrew 

 Balfour, Director of the Wellcome Bureau, for the opportunity 

 of examining the interesting new forms of Caryophyl- 

 laeidae above described, to Professor J. P. Hill for the loan 

 of five specimens of Caryophyllaeus laticeps, and to 

 Mr. C. A. Hoare for his kind aid in translating certain passages 

 in Russian. 



Summary. 



1. Four remarkable new species of Caryophyllaeidae 

 from the Anglo-Egyptian Sudan are described, three of which 

 (from Siluroid fishes) are referred to a new genus, Wenyonia 

 — W. V i r i 1 i s , W . acuminata, and W. m i n u ta — and 

 the fourth (from M o r m y r u s c a s c h i v e) to the original genus 



vide my paper on this form in the present vohime of the ' Quart. Journ. 

 Micr. Sci.' 



