186 SUMMARY OF CURRENT RESEARCHES RELATING TO 



on an anterior projection ; excretory tubes, one or two (and these lying 

 side by side) on each side, with or without ramified branches ; repro- 

 ductive organs a single set in each joint ; testes numerous or very nu- 

 merous ; uterus a narrow transverse sac, or absent ; many par-uterine 

 organs in ripe segments ; eggs without pyriform apparatus ; adults in 

 mammals. He describes 2\ gambiana F. E. B. ( = Thysanosoma 

 yambiammi Beddard) from a Gambiau Pouched Rat, and T. lemuris 

 sp. n. from a black Lemur. Another new form, A?ioplotse?iia dasyuri 

 g. et sp. n., from the Tasmanian Devil, is described. It has a large un- 

 armed head, four suckers, no neck, genital orifices single and irregularly 

 alternate, excretory tubes posteriorly one on each side, and anteriorly 

 two, very numerous testes, coiled vas deferens, large and peculiar cirrus 

 sac, posterior ovaries and yolk-glands still further back, straight and 

 narrow vagina, with an opening posterior to the cirrus sac, a recepta- 

 culum seminis, a uterus which is at first a simple sac and becomes reticu- 

 late, eggs without a V-shaped apparatus. 



Systematic Study of Marine Triclads..* — J. Wilhelmi pubhshes an 

 appendix to his Naples Monograph on marine Triclads, dealing with 

 systematic questions relating to Procerodes, Cercyra, Bdelloura, and other 

 genera. 



Pearl Holostomiasis in Carp.f — J. Ciurea describes a new disease 

 in Roumanian carp {Gyprinus carpio). He calls it " Holostomiasis per- 

 lata,'" and it is due to a larval Holostomid {Tetracotyle^^.). Cysts about 

 1 mm. in length occur in the epidermis and in the musculature. They 

 are especially common in the scaleless parts of the skin, namely, the head 

 and fins. 



New Pelagic Convolutids from Trieste.^ — L. Lohner and H. Mico- 

 letzky give a description of (Amvoluta pehu/ica and MonocJuerus illardatus 

 which they found in the plankton of the Gulf of Trieste. They discuss 

 the various species of Convoluta, contrasting in particular C. pelagic a and 

 C. schultzei. The genus Monochmriis dift'ers from Convoluta mainly in the 

 relations of the bursa seminalis. 



Rotifer a. 



New Rotifer.§ — P. de Beauchamp figures and describes a new species, 

 Harringiit rousseleti, closely allied to Dinops evpoda {longipes) of Gosse 

 and Western, which is included in this new generic designation, the 

 name Dinops being preoccupied for a mammalian genus named by 

 Savigny in 1826. The new species differs but little in outward form 

 from Harringia eiipoda, but has a different foot and entirely different 

 jaws. The author gives a full description of these two species, of their 

 affinities to, and also their very essential differences from, the nearest 

 allied genera Asplanrkna and Asplancluwpus, and also remarks on the 

 general evolution of the mastax in the w'hole family. 



* Arch. Naturges., Ixxvii. (1911) pp. 41-119. 



t Zeitschr. Fleisch. u. Milch Hygiene, xxi. (1910-11) 3 pp. (1 pi.). See also 

 Zool. Zentralbl., xviii. (1911) p. 334. 



+ Zeitschr. wiss. Zool., xcviii. (1911) pp. 381-429 (2 pis. and 6 figs.). 

 § Bull. Soc. Zool. de France, xxxvi. (1911) pp. 224-38 (4 figs, in text). 



