428 



DISCOVERY REPORTS 



1926, pi. xxxii, fig. 20), and there is a cusp on each side of the beak. The mandible has 

 a pair of basal processes, not seen in typical B. cucullata. The ovicell is smaller and more 

 cap-like (Fig. 38 B), and the spines are comparatively slender and of uniform width, in 



'■'■'■■■'■' 



A -5mm 



1 ■ 1 ■ 1 . 1 ■ 1 







B-F 



■5mm 



O e 



^Q 



Fig. 38. A-C. Bugula cucullata var. cuspidata var.n. St. TN 144, New Zealand. A. Bifurcation lettered 

 according to Harmer's scheme. The apparent joint in zooecia CE is probably an injury. B. Fertile 

 zooecia. C. Young colony with ancestrula, drawn from dry specimen. D. Bugula hyadesi Jullien, 

 34. 11. 12. 41. Challenger St. 315. E. Bugula turrita Verrill, 98.5.7.140. North-east America. 

 Avicularium. F. Bugula ditrupae Busk. 99.7.1.1014. Madeira. Avicularium from a paratype-specimen. 

 a. ancestrula, b.w. basal wall of ovicell, cu. cusp, Ip. lip of ovicell, 0. ovicell, r. rootlet, 1-3, first three 

 zooecia. 



contrast to the tapering, and often stout, spikes of the Australian specimens. When the 

 two outer spines are of different size it is the distal one that is larger in Australian 

 specimens, and the proximal one in var. cuspidata. 



