THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTOEY. 



[SIXTH SERIES.] 

 No. 9. SEPTEMBER 1888. 



XXIV. — The (renws Acinetoides, g. n., an, Intermediate Form 

 between the Ciliated Infusoria and the Aciaetse. By Dr. 

 L. Plate *. 



[Plate X., A.] 



In the spring of 1886 I found upon colonies of Zoothamyiium 

 from the Bay of Naples two peculiar, still undescribed Suc- 

 toria, which are of some interest because they remain through- 

 out life in the same stage of development which is represented 

 in other Acinetse by the freely motile buds. They justify 

 the conclusion expressed in the title of this article, that we 

 have here to do with an animal-form which combines in 

 itself some of the characteristic features of the Ciliated Infu- 

 soria and the Acinetas. The two species which have come 

 under my observation in Naples may in future be united 

 under the generic name Acinetoides, which at the same time 

 indicates that the Protozoa in question in their general habit 

 nevertheless are more nearly allied to the Suctoria than to 

 the Ciliata. 



* Translated from the * Zoologische Jahrbiicher, Abth. fiir Anatomie 

 und Ontogenie der Thiere,' Band iii. pp. 135-143 (May 1888). 



A7m. & Mag. N. Hist. Ser. 6. Vol. ii. 14 



