44 Verm , 
XV. VERMES. 
IIEMICHOKDA (including Phoronis). 
TITLES. 
1. Masterman, A. T. Preliminary note on the structure and affinities 
of Phoronis. P. R. Soc. Edinb. xxi, pp. 59-71, 5 figg. [Summary 
in Rep. Brit. Ass. Liverpool, p. 887.] 
2. Oil the structure of Actinotrocha , considered in relation to the 
suggested chordate affinities of Phoronis. T. c. pp. 129-136, 4 figg. 
[Preliminary note in Zool. Anz. xix, pp. 266-268.] 
3. Roule, L. Sur les metamorphoses larvaires du Phoronis sabatieri. 
C.R. Ac. Sci. cxxii, pp. 1343-1345. 
4. Shipley, A. E. Phoronis. Cambr. Nat. Hist, ii, ch. xvi, pp. 450-464, 
6 figg. 
BIOLOGY, SYSTEMATIC, &c. 
Although no work has been done this year on what are universally 
recognised as Ilemichorda, the Hemichordate affinities of Phoronis are 
very clearly shown by the researches of Masterman (1) & (2). He de- 
scribes notochord and mesoblastic somites in the Actinotrocha stage, and 
a branchial fissure representing a gill-slit. He proposes the name Diplo- 
chorda as a group name for Phoronis , and would place the two groups 
Ilemichorda and Diplochorda into a division, Trimetamera , as opposed 
to all other Chordates , for which lie proposes the collective name 
of Polymetamera. 
Shipley (4) gives a brief account of the genus and of 6 species. 
The larval metamorphosis of P. sabatieri is described in a preliminary 
communication by Roule (3). 
ROTIFERA. 
TITLES. 
1. Aurivillius/C. Das Plankton des Baltischen Meeres. Bib. Svenska 
Ak. xxi, Afd. iv, No. 8, pp. 1-83, 1 pi., 1 map. 
2. c Barrois, T. Recherches sur la faune des eaux douces des Acores. 
Mem. Soc. Agric. Lyon (5) vi, 1896, 172 pp., 3 maps. Abstract in 
Zool. Centralbl. iii, pp. 609-611. 
