Tun . 1 
VI. TUN1CATA. 
BY 
Professor W. A. IIerdman, D.Sc., F.R.S. 
CONTENTS. 
Page 
Introduction 1 
I. Titles 1 
II. Anatomy, Embryology, Physiology, and 
General d 
III. Geographical Distribution G 
IV. Systematic 7 
INTRODUCTION. 
One of the most important contributions to the literature of the 
subject in this and the previous year is Seeliger’s hew account of the 
T unicutd for Bronn’s well-known work. As yet we have only the history 
of our knowledge of the group, and the commencement of the section 
on the Larvacea, but these parts promise well for the importance and 
thoroughness of the complete work. 
Three investigators (Lefevre, Rankin, and Seeliger) have independently 
arrived at the conclusion, during the past year, that the supposed seg- 
mentation or 11 vertebration ” of the tail in the Appendiculariidse is an 
artifact, and does not indicate true metameric segmentation. 
Korotneff and Salensky have very valuable papers dealing with many 
points in the embryology and morphology both of Salpa and of Compound 
Ascidians. 
I.— LIST OF PUBLICATIONS* 
Apstein, Carl. (1) Die Salpen der Berliner Zoologischen Sammlung. 
Arch. Naturg. lx, i Bd., 1 Heft, pp. 41-54, taf. v. 
. (2) Die Thaliacea der Plankton-Exped. B. Vertheilung der Salpen. 
Ergeb. d. Plankton-Exp. Bd. ii, E. a. B. pp. 1-68, taf. ii-iv. 
* An asterisk prefixed to a quotation indicates that the Recorder has not seen the 
Journal or Work referred to. 
1894. [VOL. XXXI.] 
E 1 
