NOTES. 



143 



type, but Distomum mutabile, Molin, from the gall-bladder of Lacerta 

 muralis, so closely resembles your form that there can be no doubt, 

 that both forms are congeneric. The most recent description 

 of D. mutabile is given by Liihe in Centrbl. Bakt., &c., XXVIII., 

 1900, p. 563. A comparison of that description with my sketch* 

 will show you this resemblance, which extends also to the habitat 

 (i.e., the gall-bladder). You might therefore safely establish a new 

 genus for your parasite. I should not, however, advise you to do so, 

 since the state of preservation of the specimen does not admit of 

 giving a full diagnosis of the genus. 



Gen Pore 

 f Cirrus pouch t l^'affina 

 futntly ditccrtit biri 



TeslU 



Seminal Rece/itiicli- 

 pnrtlu donat of ov<try 



-i-/n,r,al uUrmi^ co.l 



ASMtr Xisrv falntlu 



Distomid parasite from gall-bladder of Ceratophora. 

 ' ' Tlie details in the organization of the worm which I have not 

 succeeded in settling are the following : — ( 1 ) The length of the intes- 

 tinal coeca : they disappear from view at the anterior border of the 

 testicles, but apparently do not terminate there. (2) The structure 

 of the copulatory organs : they are present, but so faintly outlined 

 that nothing more is visible. (3) Tlie shape and extent of the 

 excretory vesicle, the pore being alone discernible. (4) Finally, 

 the skin has fallen off, and the question whether it is or is not 

 armed with spines remains an open one. These four points ought 

 to be mentioned in the diagnosis of the new genus (speaking from a 

 strictly scientific point of view) ; but practically it will be recog- 

 nizable without them." 



School of Medicine, A. Looss. 



Cairo, December 14, 1905. 



