A. W. WATERS—REPORT.ON THE BRYOZOA. 135 
Khor Dongola, among corals on a reef (19); Beacon Island (6) and 
Engineer Island, Khor Dongola, collected by Crossland. Manaar. 
BICELLARIA CILIATA (Linneus). 
‘For synonyms see Miss Jelly’s Catalogue and add Levinsen, “ Mosdyr,” Zool. Danica, 
p. 46, pl. 1. figs. 32-85. 
The specimens from the Sudan have both the zocecia and the area somewhat 
smaller than those of my Naples or British specimens. 
Nitsche * describes the ovicell of this species, which is very curious in 
being pedunculate ; but not all species of Bicellaria have pedunculated 
ovicells, as, for instance, B. tuba and B. grandis, in which they are terminal. 
Again, in the group of Bugula neritina the ovicell is pedunculate, but it is not 
a general character in Bugula, and the same is the case in Stirparia, where 
some only have a pedunculated ovicell. This shows how careful we must be 
in the use of one character, for at first sight we should expect such a diver- 
gent form of ovicell to be of at least generic value. This question is also 
referred to under Bugula neritina. 
Loc. Northern, British, Mediterranean, Australian, 8S. Africa; Khor 
Dongola, Red Sea (19), on coral-reef, collected by Crossland. 
BUGULA AVICULARIA (Linneus). 
This species occurs from the Arctic; Northern Seas; Mediterranean ; 
Charlotte Island ; N.E. coast of America; Australia. Suez, from Mediter- 
ranean ship ‘ Thyra’ (9) ; from buoy at entrance to canal, Suez (14); Nerskah 
Makdah, 5 fath. (12), collected by Crossland. 
BuGuLa NERITINA (Linneus). (Plate 11. figs. 1-3.) 
For synonyms see Miss Jelly’s Catalogue and add :— 
Acamarchis neritina, Aud. “ Descrip. de Egypte,” Hist. nat. vol. i. p. 240, pl. 11. fig. 1. 
Bugula neritina, Calvet, “Bry. Mar. de Cette,” p. 21; Thornely, “ Manaar,” p. 109, 
(?) Rec. Indian Mus. p. 188 (these last two are probably var. minima) ; Philipps, Polyzoa from 
Loyalty Island, p. 443; Robertson, Non-Incrusting Bry. p. 266, pl. 9. fig. 47, pl. 16. fig. 97. 
Acamarchis prismatica, Gray, Dieffenbach’s New Zealand, vol. ii. p. 292. 
The ovicell of Bugula neritina has usually been unsatisfactorily figured and 
imperfectly understood, but Nitsche f has given a description and figure of 
the ovicell of Brcellaria ciliata, l1., and the two are very similar. The ovicell 
of B. neritina is pedunculate and attached at the inner upper corner of the 
zocecium. A fleshy mass grows out laterally from the inner side of the 
zocecium near to the distal end, but not close up to it; this gradually becomes 
larger, and then below it a minute portion of calcareous shell commences to 
* Zeitsch. fiir wissensch. Zool. xx. p. 4 (1869). 
+ Tom. cit. p. 3. 
