CELLULARINE AND OTHER POLYZOA. 359 
EXPLANATION OF THE PLATES. 
The drawings made with an A objective were reduced to 3, and those with a 
C objective to f their original size. 
Plate 16. 
Diagrams of bifurcation in Celiitlaritie genera (Text, Sect. IV.). The branches are all seen 
from the basal surface, and a uniform notation has been adopted for the zooecia, of which 
A is the more proximally situated zooecium which gives rise to two distal successors. The 
preparations from which the drawings were made were, in nearly all cases, Canada balsam 
mounts. 
Fig. 1. — Type 1. Didgmozotmi triseriale {' SihogA'). 
Fig. 2. — Type 2. iSfoV;>arje& (undescribed species in the 'Siboga' Collection). 
Fig. 3. — Type 3. Bugula johnstonce (' Siboga ') ; cp., connecting process. 
Fig. 4. — Type 4. Bttgula scaphoides (' Siboga ') ; „ ,, „ 
Fig. 5. — Type 6. Bugula dentata ("&i\MgB,') ; „ „ „ 
Fig. 6. — Type 6. Euoplozomn cirratum {'S'lbogn'). The dotted lines indicate the joints. 
Fig. 7.— Type 7. Ki?ietoskias (undescrlbed, ' Siboga ' Collection). 
Fig. 8. — Type 8. Scru2}oaellaria fer03: {^Siboga.'). The joint traverses the opesia (dotted 
lines) of the outer zooecia. 
Fig. 9. — Type 9. TriceUaria ternata (Norway ). A rootlet occurs on the pi'oximal segment 
of D. 
Fig. 10. — Type 10. Tricellaria occidentalis var. dilatata (Japan) ; r., rootlet. 
Fig. 11. — Type 11. 2'ricellaria peachii (Durham coast). 
Fig. 12.— Type 12. Tricellaria aculeata (' Challenger,' Stat. "303," but probably Stat. 308; 
see test, p. 355). 
Fig. 13. — Type 13. Emma cyathus (Bass Straits). 
Fig. 14. — Type 14. Emma huskii (Victoria). 
Fig. 15. — Type 15. Notojylites rostraiiis, n. s^. ('Siboga'). A rootlet occurs on the distal 
segment of K. 
Plate 17. 
Figs. 16-20. Diagrams of bifurcation, continued. The specimens from which figs. 21 and 
23-27 were drawn had been cleaned with Eau de Javelle, involving the loss of the spines 
and chitinous parts. 
Fig. 16. — Type 16. Cornucopina (from a specimen in the ' Siboga ' Collection) ; r.j}., rosette- 
plates. 
Fig. 17. — Type 17. Menipea crispa (Algoa Bay, S. Africa). The joint traverses the opesia 
(dotted lines) of the inner zooecia. 
Fig. 18.— Type 18. Menipea triseriata (Simon's Bay, S. Africa, B.M. 87.12.9.99). 
Fig. 19. — Type 19. Menipea spicata (Victoria). A system of branches, showing a sympodial 
form of colony, associated with the suppression of one of the joints at each 
bifurcation (B.M. 97.5.1.460). 
Fig. 20.— Type 20. Amastigia kirkpatncki{Lev.MSS.), n. sp. (Marion Id., B.M. 87.12.9.97). 
Fig. 21. — Amastigia mtda (Victoria, B.M. 97.5.1.246). Frontal view. Obj. A. 
26* 
