. Bulletin - United States National Museum. Science. Fig. so.—Zellekiklla venkzuelae, X 460 diameters : c snows ax aljiost epce view OF THB ANTERIOR ENO AND AN OBLIQUE VIEW OF THE POSTERIOR END OP A TWISTED INDIVIDUAL. distinct species, more archaic in< its nuclear character than Z. hylax- <: na. It should naturally have been described before the latter species. ZELLERIELLA BINUCLEATA (Raflf). Opalina binucleata Raff (1911). Hosts.—Liinnodynastes dorsalis (Gray) and L. tastnaniensis Guen- ther, both from Australia; Janet W. Raff, collector. I have had no material of this species. Raff's
. Bulletin - United States National Museum. Science. Fig. so.—Zellekiklla venkzuelae, X 460 diameters : c snows ax aljiost epce view OF THB ANTERIOR ENO AND AN OBLIQUE VIEW OF THE POSTERIOR END OP A TWISTED INDIVIDUAL. distinct species, more archaic in< its nuclear character than Z. hylax- <: na. It should naturally have been described before the latter species. ZELLERIELLA BINUCLEATA (Raflf). Opalina binucleata Raff (1911). Hosts.—Liinnodynastes dorsalis (Gray) and L. tastnaniensis Guen- ther, both from Australia; Janet W. Raff, collector. I have had no material of this species. Raff's description in full is as follows: Opalina binucleata, n. sp. This is found in great numbers in Limnodijnnstes dorsalis and on one occasion I met with it in L. tasmaniensis. It is a broad, flat form with two nuclei, and is ciliated equally over all its surface, the cilia being arranged in longitudinal rows as in other Opalinae. It is broader and more bluntlj^ pointed at the posterior end than at the anterior [fig. 81o] and moves along with the anterior end foremost. Its usual position Avhen swimming along is on either flat surface, but as it proceeds it occasionally rolls over from side to side. The average length is 157/^ and the average breadth lOOfi, but larger and smaller individuals have been met with. When the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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