452 



DISCOVERY REPORTS 



46 B, C) are without runners. The rootlets may terminate in a branched disk. The 

 smaller avicularia have blunt mandibles. 



The colonies vary in general appearance. Some are profusely branched, with many 

 secondary branches and rootlets, and present a dense mat-like appearance (Plate IX, 

 fig. 3). Others, such as the colony from St. 1651, are more lax in growth. The material 

 from St. 1660 includes some specimens with long straight zooecia forming broad strap- 

 like branches with as many as twelve series of zooecia. Other specimens from the same 

 station have shorter, less straight, zooecia, and narrower branches. There is also varia- 

 tion in the spines which are sometimes very stout, the median distal one being par- 

 ticularly large. This is well seen, for example, in the material from St. TN 194. 



z.s 



z.m 



m.r.c 



'■'■'■'■■■■ 

 A-C -5mm 



L_ 1 — l 1 1 ■ 1 ■ 1 ■ 1 



D.E -5mm 



Fig. 46. A. Camptoplites angustus (Kluge). St. TN 340, Ross Sea. Part of a secondary branch. Three 

 zooecia have their opercula open. B, C. C. tricornis (Waters). 30.3.5.4. Ross Sea. B. Axillary 

 rootlet-chamber. C. Marginal rootlet-chamber, with rootlet and base of secondary branch. D, E. 

 C. angustus (Kluge). St. TN 339, Ross Sea. Avicularia. 



ax.r.c. axillary rootlet-chamber, m.r.c. marginal rootlet-chamber, r. rootlet, r.pl. rosette-plate, z.m. wall 

 of marginal zooecium of main branch, z.s. zooecium of secondary branch. 



9. Camptoplites abyssicolus (Kluge). 



Bugula abyssicola Kluge, 1914, p. 632, text-fig. 18. 



Camptoplites abyssicolus Harmer, 1923, p. 300. 

 Station distribution. Not represented in the Discovery collections. 

 Geographical distribution. Southern Ocean, 2450 m. (Kluge). 

 I have seen no specimen of this species. 



10. Camptoplites angustus (Kluge). Plate XII, fig. 3 ; Fig. 46 A, D, E. 

 Bugula angusta Kluge, 1914, p. 631, pi. xxx, fig. 5, text-fig. 17. 

 Camptoplites angustus Harmer 1923, p. 300. 



