5 
ig. 16. 
Wie 
Pwealicy, 
Ag) 
. dd. 
L.M.B.C. TURBELLARIA. 3} 
Copulatory organ of P. flabellifer, (after v. Graff). 
Byrsophlebs intermedia, v. Graff. Natural 
length 1 mm. (X 20). 
Copulatory organ of B. intermedia. 
PrAarE XII. 
Acrorhynchus caledonicus, Claparede. Drawn 
from the living animal. Natural length 1°5— 
2mm. (X 20). 
. Copulatory organ of A. caledonicus. 
. Granule-vesicle of Macrorhynchus naegelw, Koll. 
. Male genital organs of Macrorhynchus helgolan- 
dicus, Metschnikoff, (after v. Graff). 
. Hyporhynchus armatus, Jensen. Natural length 
1°) iawn, (S< VAD), 
. Copulatory organ of H. armatus. 
. Vorticeros auriculatum, O.F.M. ‘Tentacles not 
quite fully extended. Drawn from life (x 25). 
. Plagiostoma vittatum, Frey and Leuckart (xX 25). 
. Provortez balticus, Schultze. From the living 
animal (x 60). 
. Chitinous copulatory organ of P. balticus. 
. Plagiostoma sulphureum, v. Graff. From the 
living animal. Natural length 2 mm. (x 25). 
. Ripe spermatozoon of P. sulphurewm. 
. Allostoma pallidum, van Beneden. Natural 
length 1°5—2°5 mm. (X 25). 
. The genital organs of A. pallidum, (after v. 
Graff). 
PuaTE XIV. 
Pseudorhynchus bifidus, M‘Intosh. Drawn from 
life, showing the anterior conical proboscis. 
Natural length 1°5 mm. (x 25). 
