ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
45 
Classification of Triclada.*— M. P. Hallez has a preliminary notice 
of his classification of Triclad Turbellaria. He divides the Turbellaria 
thus : — 
Turbellaria 
-p. • ill ,• ( Rhabdoccelida Graff. 
Diploblastica j Triclada L J g _ 
Triploblastica Polyclada Lang. 
The order of the Triclads is divided into three tribes ; Maricola, 
Paludicola, and Terricola. The order is defined in the following terms : 
Diploblastic Turbellaria, with an intestinal apparatus formed of three 
principal branches, of which the anterior is unpaired, and the two 
posterior paired and recurrent ; pharynx situated at the point of junction 
of the three branches. Numerous follicular testicles, rarely reduced 
to one pair. Follicular vitelline glands, rarely ( Otoplana ) comp>act. 
Buccal orifice generally behind the middle of the body. Body more 
or less plano-convex. A genital cloaca and a uterus. Genital pores 
(both male and female) always behind the mouth. 
The Maricola, or forms of marine habitat, have the intestinal branches 
lobed, or branching but little. Mouth in the second half of the body 
(except Bdellura ). Body depressed. Uterus behind the genital orifice 
(except ? Otoplana). The families Otoplanida and Procerodida are free, 
but the Bdellurida are ectoparasitic. 
The Paludicola live in fresh water, have the intestinal branches much 
ramified, the mouth in the second half of the body. Body depressed ; 
uterus between pharynx and penis, with a dorsal uterine canal. In the 
Planarida and Anocelida the head is not formed for fixation, and the 
edges of the body are not undulated in a state of repose ; the opposite 
obtains in the Dendrocelida. 
The Terricola are terrestrial Triclads, with the branches of the 
intestine generally simply lobed. The mouth varies in position. Body 
variable in form. Uterus rudimentary. Ventral muscular system well 
developed. In the Limacopsidae the dorsal surface is very convex, and 
the mouth is in the anterior third of the body. In the Geoplanida the 
body is subcylindrical, and the mouth almost median (except in Micro- 
plana ), while in the family Polycladida the body is depressed and the 
mouth is in the posterior third of the body. 
Land Planarians from Tasmania and South Australia.f — Dr. A. 
Dendy remarks that the only Tasmanian Land Planarian hitherto 
described is Geoplana Tasmaniana, which was collected by Darwin 
during the voyage of the £ Beagle.’ The few specimens which the author 
and his wife were able to collect near Hobart go to show that the 
Land Planarians of Tasmania are very similar to those of Victoria. 
G. alba , G. adse , and G. walhallse have been collected, while there is a 
single specimen of a species allied to G. quadrangulata and G. ventro- 
punctata. From Adelaide, Dr. Dendy has received G. fletcheri , a 
Victorian form, and a variety of it which he calls var. adelaidensis. 
Land Planarians from Queensland. J — Dr. A. Dendy describes the 
land Planarians collected by Prof. Spencer in his expedition to Southern 
* Bull. Soc. Zool. France, xvii. (1892) pp. 106-9. 
f Australasian Assoc. Advanc. Sci., 1892, Section D, 6 pp. (separate copy). 
j Proc. Roy. Soc. Victoria, 1891 (1892) pp. 123-9 (1 pi.). 
