ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 675 



J. F. James. He has endeavoured to correct and deepen the diagnoses, 

 and to adjust the nomenclature. 



Development of Flustrella hispida (Fabricius).* — R. M. Pace has 

 investigated the earlier stages, and gives an account of the eggs, sper- 

 matogenesis and oogenesis, maturation, segmentation to the 32-celled 

 stage, etc. The main results obtained are the following. There is a 

 "yolk-nucleus " in the egg. The formation of the endoderm has been 

 traced. The oral and aboral ectoderm are differentiated as early as the 

 16-celled stage and remain quite distinct from that time onward. 

 The ciliated ring of the larva is formed by the coalescence of several 

 originally distinct rows of cells, and not by the hypertrophy of a single 

 row. A stomach comparable to that of Alcyonidium is present also in 

 Flustrella. 



Brachiopods of the Valdivia and Gauss Expeditions.! — F. Bloch- 

 mann makes a preliminary report on new species from the far south— 

 Liothyrina antarctica, L. w inter i, Ghlidonophora chuni (with a relatively 

 long stalk with a brush-like lower end adapted for fixation in the loose 

 Qlobiqerina ooze), Macandrevia vanhoffeni, Magellania joubin i, and Tero- 

 bratella enzenspergeri. 



Norwegian Actinotrocha and the Affinities of Phoronis.J — A. 

 Schepotieff describes two forms of Actinotrocha from Norway, and dis- 

 cusses briefly the affinities of Phoronis, which on account not of the 

 structure of the larva only, but of the whole organisation is to be placed 

 near the Phylactolaemata (Bryozoa) on the one side and the Pterobranehise 

 on the other. It thus belongs to the oligomere forms which, on 

 accouut of their connections with the Pterobranchiae, are all related, and 

 form a group of the Triarticulata (Schimkewitsch, 1892), as follows : — 



I typical TriavticalaU { ^ZS 



Oligomere . ....(.,.., I Phoronidea 



modified with epistome k, , , 



m . ,. i , •{ r i Ectoprocta 



Triarticulata j ^ ^ Brachiopoda 



forms. 



Near the oligomeres but not related to each other are on one side 

 the Chaetognatha and on the other the Endoprocta. In all cases where 

 development is known the structure of the free-swimming larvas may 

 be referred to the general type of the trochophore. The Actinotrocha 

 deviates considerably from this type in the presence of the tentacle 

 crown. 



Rotatoria. 



Rotifera from Indo- China, Sumatra and Java, etc.§ — E. T. 

 Weber, having examined some tubes of plankton material collected in 

 these countries by Walter Volz, gives lists of the Rotifera found in 

 these gatherings, some 25 species in all. The author describes and 

 figures in the text some of the more remarkable forms found in these 



* Quart. Journ. Micr. Sci., No. 199 (1906) pp. 435-78 (4 pis.) 



t Zool. Anzeig., xxx. (1906) pp. 690-702 (3 figs.). 



X Zeitschr. wiaa. Zool., lxxxiv. (1906) pp. 79-94 (2 pis.). 



§ Zool. Jahrb., xxiv. (1906) pp. 207-226. 



