68 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
Thirdly, the author describes Vortex microphthalmus sp. n. and V. quadri- 
oculatus sp. n., and seeks to refer the gonads of Opistoma , Derostoma, 
and Vortex to a common type of structure. A fourtti chapter discusses 
the Prorhynchidse of Bohemia, describing Prorhynchus funtinalis sp. n. 
and Pr. hygrophilus sp. n. Fifthly, Vejdovsky describes Macrostoma 
obtusum sp. n., and compares it with other Macrostomidae. 
He then passes to Bothrioplana boltemica sp. n. and compares the 
characters of this type (Bothrioplanidae f. n.) with those of other Tur- 
bellariaus. The branched gut shows three main divisions, and the 
posterior branches fuse, as in many Triclades ; the anterior and posterior 
regions give off lateral paired and simple pouches, as in Microplana ; 
the pharynx is plicate as in Monotidae ; there may be one pair or two 
pairs of olfactory grooves ; the nervous system resembles that of 
Triclades ; the excretory system is disposed like that of Triclades, and 
opens like that of Bhabdocoela. The genital apparatus lies in the 
posterior part of the body behind the pharynx, with a large antrum into 
which the paired dorsal compact testes open by two vasa deferentia, 
with a seminal vesicle and a simple penis like that of Plagiostomidae. 
There is a pair of ovaries, a pair of lobed yolk-glands, and a uterus. 
The gonads have a tunica propria. 
Vejdovsky finally discusses Planaria Mrazelcii, which is probably a 
direct derivative of PL lactea, from which it differs in the absence of 
eyes, in the less developed state of the suctorial pit, in the position of 
the large ovaries, in the larger number of testes, and in having a long- 
stalked uterus. The author also gives a revision of Bohemian Triclades. 
South American Taeniae.* — Dr. M. Liilie describes Tsenia ( Monieza ) 
rugosa Dies., from Cebus hypoxanthus ; T. ( Anoplocephala ) globiceps 
D ies., from the tapir; T. decrescens Dies., from Dicotyles albirosiris ; 
T. megastoma Dies., from Brazilian monkeys; and T. tetragonocephala 
Dies., from Myrmecophaga. 
New Cestode.j — Dr. N. K. Germanos describes BothrioccpJialus schisto- 
chilos sp. n. from the intestine of Phoca barbata. The specific title 
refers to the remarkable way in which the margins of the joints are cleft 
posteriorly and hang down like ear-lobes. Another characteristic 
external feature is the proportionally large and thick head, which bears 
two suckers with protuberant margins. In internal structure the most 
striking peculiarities are those of the excretory or water-vascular 
system. Thus there is a sharp differentiation between central and 
peripheral longitudinal canals. They are not connected as usual by 
transverse anastomoses, but the central system shows a peculiar seg- 
mental system of branches. The four canals of the central system, and 
the twelve canals of the peripheral system run uniformly and symmetri- 
cally through the whole strobila, and retain their original cavities. 
Bilharzia haematobia.J — Dr. A. Looss gives a detailed account of 
the anatomy and histology of this parasite, supplementing and correcting 
the descriptions of previous investigators. We cannot summarise the 
numerous minute points which are new, but in illustration would direct 
* Arch. f. Natnrgesch., lxi. (1895) pp. 199-212 (1 pi.). 
f Jenaische Zeitschr. f. Naturwiss., xxx. (1895) pp. 1-38 (2 pis. and 1 fig.). 
j Arch. f. Mikr. Anat., xlvi. (1895) pp. 1-108 (3 pL.). 
