44 



SUADIARY OF CURRENT RESEARCHES RELATING TO 



posterior to the acetabulum, and the intestine having short lateral pro- 

 jections, place the worm undoubtedly in the genus Glimstomum Leidy. 

 But it differs from all previously described species. J. A. T. 



Cuticula and Sub-cuticula of Trematodes and Cestodes.— H. S. 

 Pratt {Proc. Amer. Soc. Zool. in Anat. Record, 1919, 15, 342). Both 

 cuticula and sub-cuticula belong genetically to the parenchyma, and 

 are mesenchymatous, not ectodermic. Warts on the tail of a Cercaria 

 {C. fusca) lie outside of the layers of longitudinal muscle and sub- 

 cuticular cells, and are composed exclusively of the peripheral portion 

 of the parenchyma. J. A. T. 



Cercariae of Transvaal. — F. G. Cawston {Parasitology, 1918, 11, 

 94-7), ■ Examination of numerous specimens of fresh-water snails (e.g. 

 Isidora) showed the presence of various kinds of Cercariae (G. arcuata, 

 C.frondosa, G. gladii, etc.), and it was found that snails from flowing 

 rivers were less infected than those in stagnant water. Lime in the 

 river-bed seems also inimical. This will account for the relative infre- 

 quency of Bilharziasis along the Vaal river, as compared with its 

 occurrence in those portions of the Low Veldt through which the 

 Crocodile river and its tributaries flow. J. A. T. 



Bilharziasis in Natal. — F. G. Cawston {Parasitology, 1918, 11, 

 83-93). Cercariae of Bilharzia, similar to those which cause Bilharziasis 

 in Egypt, occur in Natal in Physopsis africana, but it is rare to find a 

 person whose life has been shortened by the disease. Specimens of the 

 snail exposed to infection from the urine of Bilharzia patients show an 

 increase in the number of infected forms. J. A. T, 



Incertee Sedis. 



Notes on Gastrotricha.— E. H. Cordeeo {Physis. Rev. Soc. Argent. 

 Gienc. Nat., 1918, 4, 241-55, 1 pi.). A description is given of a 



Fig. 1. — Chsetonotus montevideensis sp. n. x 500. 



number of these imperfectly known animals, which Cordero ranks near 

 Rotifers. Those described are from near Montevideo, Uruguay, and 



