306 



The ooecia, which may almost reach the same size as the zooecia, have the 

 form of robust cones inclined distally and somewhat inwards and enclose an 

 almost elliptical cavity. Their surface is provided with numerous, more or less 

 sharp and regular longitudinal ridges, the furrows between which contain pore- 

 pits. 



The colonies jointed, richly branched, with cylindrical internodes the length of 

 which is 15—18""". They have 8—10 longitudinal rows of zooecia, with ca. 13 in 

 each longitudinal row. 



Port Elizabeth (Miss Jelly). . 



Like Busk* I regard the Mediterranean species Tub. cereoides as a distinct 

 species. 



Tubucellaria hirsuta Lamour. 



Busk, Challenger, Zoology, Vol. X, part 1, 1884, p. 100, PI. XXXVI, fig. 18. 



(PI. XVI., figs. 3 a— 3 e). 



The zooecia rhombic-oval, strongly arched, not surrounded by marginal rid- 

 ges. The pore-pits (fig. 3 e), which are elongated, drop-like, are provided at their 

 proximal ends with a very small pore and the walls surrounding the pits are 

 beset with numerous small, but fairly high tubercles, 8 — 10 of which surround 

 each pit. The obliquely ascending peristome, the aperture of which is transversely 

 oval and its length contained 3 — 3^3 times in that of the zocecial tube, may be more 

 or less distinctly striated by faint longitudinal ribs beset with tubercles, and except 

 in the two distal zooecia in each internode its distal wall is only to a small extent 

 freely projecting. The ascopore, which is situated somewhat proximally to the 

 peristome, is surrounded by a horse-shoe-shaped wall beset with tubercles with 

 the incision directed towards the peristome, and it is continued on the inner 

 surface of the zooecium as a short, free tube increasing in width inwardly. Im- 

 mediately proximally to the peristome there is on each side a low, but fairly 

 broad, arched, conical chamber, separated from the cavity of the zooecium by a 

 multiporous rosette-plate which is divided into a number of uniporous areas 

 (fig. 3 d) by a circle of calcareous ridges (fig. 3 d). This chamber medially on the 

 frontal plate is provided with an opening and from it rises a distally directed, 

 hollow, slightly calcified tube which may be called a radical tube. In a number 

 of the proximal internodes of the colony other tubes appear on some few (2 — 3) 

 of the proximal zooecia in addition to those mentioned; these tubes are widened 



' 8, p. 100. 



