ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 285 



left side were all testes full of spermatozoa. Such a case has not lieeii 

 previously recorded. The heriiiaphroditisin is perfectly definite and 

 clear-cut. AVhatever cause may have determined the sex of tliis one 

 half-segment, it must apparently have come into operation comparatively 

 late in embryonic life, "when the rudiments destined to give rise to this 

 gonad separated from those which gave rise to the male gonads. 



Tunicata, 



Blood of Phallusia.* — J. Cantacuzene has studied the 1)lood of 

 FhaJlusia mamiUata, and finds that it contains an energetic oxydase. 

 The tissues darken on exposure to air, and the fingers of the investigator 

 are stained as if with ink. The localization of the oxydase, determined 

 by gaiac staining, is in certain amcL^l)ocytes, it may be within special 

 vacuoles or on the surface of intra-cytoplasmic plastids. There appears 

 to be evidence that the only vehicles of the oxydase are certain kinds of 

 amoebocytes. The author asks whether the vanadium which occurs in 

 the tissues of this large Ascidiau may not exert in relation to the oxydase 

 the same role that manganese exerts in relation to the laccase of 

 Bertrand. 



INVERTEBRATA. 



Mollusca. 

 7- Gastropoda. 



Musculature and Foot-glands of Tonicella marmorea.f — P. Hen- 

 Tici descril)es in this Chiton the masculus longitudinalis lateralis which 

 extends along both sides of the body. It does not consist of a series 

 of short muscles, but is strictly one. There are numerous longitudinal 

 muscle-fibres in the mantle. The rolling up is not due to the forcing 

 of blood into the inter-segments. It is due to the contraction of the 

 longitudinal lateral muscle. The author describes a variety which is 

 equipped with a glandular zone in the anterior margin of the foot, and 

 another which is without glands in the posterior portion of the mantle- 

 groove. 



Supporting-tissue in G-asteropods.J— Josef Schaffer describes the 

 chondroid vesicular supporting-tissue that occurs in the so-called tongue- 

 cartilage of Gasteropods. There is a gradation of types, as it were fixa- 

 tions of different stages in the evolution of cartilage, and there are inter- 

 mediate types leading on to the cartilage of Invertebrates. Descriptions 

 are given of the condition of the supporting tissue in Aplysia, Limnaea, 

 Helix, Fterotrachea^lAmpuUaria, Haliotis, Bucciniim, Patella, Chiton, and 

 other types. 



Chromatin of Ovum of Creseis.§ — Boris Zarnik calls attention to 

 the difference between the chromatin equipment of the ova and of the 



* C.K. See. Biol. Paris, Ixxiv. (1913) pp. 633-5. 



t Arkiv ZooL, vii. (1913) No. 35, pp. 1-17 (3 pis.). 



X Zeitschr. wiss. ZooL, cv. (1913) pp. 280-347 (2 pis. and 4 figs.). 



§ Resumes Communications, 9e Congres Internat. Zoologie, 1913, pp. 11-12. 



