to 



ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 615 



it plain that the adult pharynx does not originate at the place where the 

 embryonic pharynx degenerates. 



New Monostome from Snapping Turtle.*— AV. Gr. MacCallum 

 describes a peculiar Trematode from the lungs and larger bronchial 

 tracts of the river snapping turtle (Chelydra serpentina). It seems 

 necessary to establish a new genus in the family Monostomidaj for this 

 new form, for Avhich the name Heronimus chelydrce is proposed. It 

 stands far apart from the other genera in several respects, but especially 

 in the position and nature of the genital opening, in the complicated 

 structure and course of the uterine tract, in the unusual formation of 

 the yolk-glands, in the presence of but one testicle, and in the position 

 of the excretory pore. 



Behaviour of Chromatin in Segmentation of Ovum of Gyro- 

 dactylus.f — C. v. Janicki finds that in the resting ovum the chromatin 

 is distributed in fine granules in the nuclear area. As division begins 

 the granules are somehow aggregated into about eight chromosomes 

 which are enclosed in " karyomerites " or nucleoli, as Goldschmidt 

 described in Polysiomum. Subsequently the chromatin passes out from 

 its provisional bearers leaving them empty plasmic nucleoli. 



Peculiar Cestode from Acanthias.J — Max Liihe describes the pro- 

 glottis of Uroyonoporus armatus g. et sp. n., from the spiral intestine of 

 dog-fish. The anterior portion of the proglottis is modified into heart- 

 shaped attaching lobes, forming a very mobile organ beset on each side 

 with strong spines. The genitalia lie at the pointed posterior end. It 

 seems that" this new form represents a special family in the vicinity of 

 the Tetraphyllida3, but neither scolex nor chain was seen. 



The group Cestodaria requires to be broken up, for Gary ophyll mis 

 and Archiyetes are, as Mrazek has shown, in close relationship with the 

 Bothriocephalidee, while Amphilina and Gyrocotyh remain, forming a 

 characteristic group, or class, equivalent to Trematoda and Cestoda. 



Bothriocephalus in the Baltic Herring.§ — Guido Schneider found 

 in the stomach and intestine of Glupea liarengus membras numerous, 

 specimens, the young stage of Bothriotcmia proboscidea Batsch ( = Bothrio- 

 cephalus infundibidiformis Bud.). The well-developed scolex showed 

 the closest resemblance to the characteristic head of the adult tapeworm, 

 which is so common in Baltic salmon. As salmon devour herring the 

 probability of their being thus infected with Bothriotcenia is strong. 



Incertas Sedis. 



Evolution of Platystrophia.|| — E. R. Cumings has made a study of 

 the morphogenesis of this Palaeozoic Brachiopod, giving an outline of 

 the probable history of the genus. Its highest degree of variability is. 



* Centralbl. Bakt. Parasitenkunde, l ,e Abt., xxxii. (1902) pp. 632-6 (2 figs.). 

 t Zool. Anzeig., xxvi. (1903) pp. 241-5 (4 figs.). 



% Arch. Parasitol., v. (1902) pp. 209-50(1 pi.); Centralbl. Bakt. Parasitenkunde,. 

 I 19 Abt, xxxi. (1902) pp. 690-1. 



§ SB. Ges. Naturf. Berlin. 1902, pp. 28-30. 



|| Amer. Journ. Sci., xv. (1903) pp. 1-48. 121-36 (26 figs, and 1 pi.). 



