1GG 



M KIM STIC VAlMATInN. 



[PART i. 



118. 



11<) 



' 



Hirudo officinalis : of 7 specimens, 5 had 9 pairs of testes, 

 1 hud in pairs, and though in the 7th specimen there were 

 2 pairs, th.- vas deferens of the last pair of testes ended blindly. 

 find. 



Hirudo medlclnalis. Fairly often the vas defereus is prolonged beyond the 



',[], ,,! having passed through five annuli, ends in a glandular mass oi 



i rn Case given in which the 7 last testes of right side were absent or 



on h :t, ,1 l-y amorphous material, the testes of the left side being abnormally 



. I >.KI>. .Y/ir. monoflr. iks Sanysues med., Paris, 1857, p. 9'd. 



*120. Hirudo officinalis : an individual having a supernumerary 

 penis and veneula seminalis of the right side, in the 5th somite. 



vs- 



FIG. 2<>. Case of Ilini/In i;/7i<-/i///.<, Xo. 120. 



ji\ jirni.' in normal position; p-, supernumerary penis; rx, the usual vesicula? 

 si-miiialt^ ; /.--, supi-rnumerary vesicula seminalis. (From a diagram sent to me by 

 Mr (ribaon.) 



Tin- iiunnal penis in the sixth segment was fully formed and 

 into it opened on rithrr side a vas deferens, provided with a 

 vesicula M'lninalis as usual. But the vesicula of the right side 

 gave otV in addition a vas dcffiTiis, which passed forwards into 

 tli.' fourth segment and there enlarged into another vesicula 

 M-iniiialis. This additional vesicula was connected by a duct 

 with a supernumerary penis placed and opening in the middle 

 of the fifth M'gnieiit. The parts of the left side as well as the 

 female organs were normal. [I have to thank Mr Gibson for 

 furnishing me with a diagram (Fig. 2(>) supplementing the 

 puMi-hed account.] GIBSON, R. J. HARVEY, Xature, 1887, xxxv., 

 P. 392. 



Aulastoma gulo <Ilor>c Leech). In this form as is usual. 

 anioii'4 the Gnathobdellidce there are from 9 to 12 pairs of tes- 



