(DTI. A. C. OÜDENFAKSi. NOTES OUT ACA RT VI. 23 



Last pair of suckers flanked by 



I a spine A. dugesi (Clap.) 



■ 'jLast pair of suckers not flanked 



' by such A. berghi (Jensen). A. fe- 



roniarum (Duf.), A. fimetarius (Can. et Beri.), and A. julorum 

 (C. L. Koch). 



25. Remarks on the hypopi of Anoetus. 



With flie present knowledge, short descriptions and badly drawn 

 figures I am unable to discover any differences between de iiypopi 

 of the lastnamed foui" species. 



1. Anoetus muscarmn (L.). Canestrini (Prosp. Acarof. Ital. v. 3, 

 p. 369) says: « L'apparato di aderenza si compone di otto ventose » 

 etc. In fact we must say : there is a large sucker- plate with 4 

 suckers, "2 very small ones before and 2 very large ones behind 

 the anus. Before the sucker plate is the genital aperture, and 

 when the genital covers are open, 4 genital suckers are visible. 

 There are no suckers near the coxae 2, 3 and 4, nor to the sides 

 of the genital aperture. 



2. Anoetus julorum (C. L. Koch). Canestrini (Prosp. Acai'of. 

 Ital. v. 3, p. 371) tells us: vcil quarto articolo delle zampe mede- 

 sime » (=del primo pajo) « ha ali estremità anteriore e due 



clave sensorie. » This is not exact. The two sensorial hairs are 

 planted on the proximal end of the JiftU article of the leg. — 

 Further : « Tutte le zampe sono terminate, olire che da una unghia 

 e da una ventosa )).... This is inexact too, for there is no question 

 of suckers on legs 2, 3 and 4. If this be true, why has he not 

 delineated them in his figure on Plate 31 ? — Further: «L'apparato 

 di adesione si compone di dieci ventose», etc. We must read this 

 passage as follows : The sucker-plate has 8 suckers, ranged 2, 4, 2, 

 of which the two central ones are slightly larger than the others. 

 Before the sucker-plate is the genital split which, when it is open 

 does not show any internal suckers. This split is flanked posteriorly 

 by a very minute spine on each side, which, when seen on its top 

 shows itself as a small circle (see a. o. Jensen's figui'e of Anoetus 



