The Nature of certain Ovum-like Bodies 

 found in the Seminiferous Tubules. 



By 

 F. A. E. Crew and Honor B. Fell 



(From the Animal Breeding Research Department, University of 



Edinburgh.) 



With Plates 18-23. 



Introduction. 



During the systematic examination of a goat with an 

 abnormal reproductive system sent to this Department 

 by Mr. T. H. Gillespie, Director-Secretary of the Scottish 

 Zoological Park, certain peculiar ovum-like bodies were found 

 within the seminiferous tubules of the ectopic testes.^ In order 

 to decide as to the exact nature of these, it was necessary to 

 extend the investigation so as to include an examination of 

 other abnormal gonads. To Mr. M. S. Pease, of the School of 

 Agriculture, Cambridge, we are indebted for an undescended 

 testis from a rabbit in which he had found bodies exactly 

 similar to those found by us in the case of the goat, and also 

 for permission to include a description of his series in this 

 paper. An undescended testis from the human was sent to 

 this Department by Sir Edward Sharpey Schafer, and one from 

 a cat by Mr. A. Cameron, of the Eoyal (Dick) Veterinary 

 College. Without this material our work must have remained 

 very incomplete, and in acknowledging our debt we wish to 

 render our grateful thanks. 



We are also much indebted to the Staff of the Pathology 

 Department of the University of Edinburgh, and to Mr. E. G. 

 Glass for much practical assistance in the course of our study. 



^ ' Veterinary Journal ', April 1922. 

 NO. 264 Q q 



