TITLES. SUBJECT-INDEX. 
Tun. 3 
20. Pizon, A. Etudes biologiques sur les Tuniciers Coloniaux fixes. 
Bull. Soc. Ouest France ix, pp. 1-55, 16 pis. 
21. -. Description d’un nouveau genre d’Ascidie Simple des Cotes de 
France {Polycarpoides sabulosum). Bull. Mus. Paris 1898, No. 7, 
pp. 326 & 327. 
22. -. Description d’un nouveau genre d’Ascidie Simple de la famille 
des Molgulidees, Meristocarpus. T. c. No. 1, pp. 42 & 43. 
23. -. Sur la coloration des Tuniciers et la mobilite de leurs granules 
pigmentaires. C.R. Ac. Sci. cxxix, pp. 395-398. 
24. Ritter, W. E. Contribution to the knowledge of the Tunicates of 
the Pribilof Islands. Extracted from Jordan’s “The Fur Seals and 
Fur-Seal Islands of the North Pacific Ocean,” pt. in, pp. 511-537, 
pi. lxxxvi. Treasury Department document 2017. Washington, 
1899. 
25. Schultze, L. S. Die Degeneration des Ganglions von Ciona intestin- 
alis , und iiber das Verhaltnis der Regeneration und Knospung zur 
Keimblatterlehre, 86 pp. & 2 pis. Habilit.-Schr. Jena, 1899; and 
Jena. Zeitschr. xxxiii, pp. 263-344, 2 pis. 
26. Seeliger, 0. Ueber Segmentation und Yerwandtschaftsbeziehungen 
der Appendicularien. Sitzb. naturf. Gesellsch. Rostock (Anh. z. 
Arch. d. Yer. d. Freunde d. Naturg. Mecklenb.) 1899, No. 3, pp. 2-10. 
27. Selys Longchamps, M. de. Etude de la Brancliie chez Ascidiella 
scabroides. Arch. Biol, xvi, pp. 117-171, pis. viii-x. 
28. Sluiter, C. Ph. Berichtigung liber eine Synstyela-Ai't. Zool. Anz. 
No. 608, p. 110. 
29. Willey, A. Remarks on some recent work on the Protochordata, &c. 
Quart. J. Micr. Sci., No. 166, pp. 223-244. 
II. SUBJECT-INDEX. 
a. Anatomy. 
Damas comes to much the same conclusions as Newstead (1893) in 
regard to the epicardial formations in Ciona , and shows that the so-called 
perivisceral cavity opens into the branchial sac, and corresponds to the 
epicardium of Clavelina. 
Selys Longchamps has studied the detailed arrangement of the stigmata 
in the branchial sac of Ascidiella scabroides , and their development from 
the six primary protostigmata. He finds that every new stigma is a part 
separated from a pre-existing stigma. The dorsal lamina in this species 
commences as a series of languets which are later on united by a con¬ 
tinuous membrane. He shows the changes the branchial sac goes through 
in becoming adult by the formation of new ranges of stigmata, and 
transverse vessels of different orders, and argues that care should be taken 
to employ only the fully formed branchial sac in characterising species. 
Lohmann has shown that the cuticular house of the Appendicularians 
is a complicated apparatus of passages with partial septa, forming in places 
a finely perforated network, all produced as a secretion from certain large 
ectoderm cells, the oikoplasts, on the anterior part of the body (see also 
under Physiology). 
