BRYOZOA FROM ZANZIBAR. 855 
The stalk is broad, especially at the base, and is also wide 
where the calyx is attached, though not so wide as figured by 
Robertson in many of the figures, but she shows a distinct 
separation in fig. 4. In the stolon there is a septum pretty near 
to the stalk on each side of it, and there is a considerable space 
from stalk to stalk. 
‘The preparation was stained and mounted for some other more 
transparent species, and it is not suitable for following any 
inuscle from the stalk up the calyx, nor am I able to see anything 
suggesting it. 
While unable to aceept the genus Myosoma at present, of 
which I have been unable to make sections, it may turn out that 
it is advisable to retain the genus. 
1 now think that the Pedicellina from Naples with numerous 
stout recurved spines, to which I referred*, is P. hirsuta Jull. 
Loc. Tomales Bay, California, beach; Fort Point and San 
Pedro, California. Wastin, Brit. E. Africa, 10 fath., with Coral- 
lina etc. (500), collected by Crossland. 
BARENTSIA GRACILIS (Sars). 
For synonyms see Waters, ‘“‘ Rep. Mar. Biol. of the Sudanese 
Red Sea, pt. 11.,” Journ. Linn. Soce., Zool. vol. xxxi. p. 251 (1910) 
and add :— 
Pedicellina gracilis Pottinger, ‘“‘ Anat. des Pédicellines de la Cote 
d’Ostende,” Arch. de Biol. vol. vil. p. 300, etc. (1886). 
Ascopodaria gracilis Norman, “'The Polyzoa of Madeira and 
neigh. Isl.,” Journ. Linn. Soc., Zool. vol. xxx. p. 277 (1909). 
Some of the stalks have the swelling in the middle, which have 
been found from many places, and in consequence of which the 
species nodosa was made. James Ritchie? has confirmed what 
I have said ¢ as to the genus Gonopodaria being superfluous. 
Loc. Arctic; European coast, generally; Mediterranean ; Red 
Sea; Madeira; Australasia. Ras Osowamembe, Zanzibar 
Channel, 10 fath. (6504); Wasin, Brit. EK. Africa, 10 fath. (500) ; 
Chuaka, Zanzibar, ‘from growth on elytron of Aphroditid” ; 
Chuaka, Zanzibar, 2 fath. (508), (509), (519): collected by 
Crossland. 
LoxosoMA SINGULARE Keferstein. 
Lowxosoma singulare Kef. Zeit. wiss. Zool. vol. xii. p. 13, pl. xi. 
fig. 29 (1862); and add to Miss Jelly’s Catalogue :— 
Loxosoma singulare Jull. & Calvet, “ Bry. prov. de l’Hiron- 
delle,” p. 28, pl. 1. fig. 5(1903) ; Harmer, ‘‘ Struct. and Devel. of 
Loxosoma,” Q. J. Micr. Se. 1885, p. 4 . 
There are a number of specimens growing on Schizoporella 
p. 252 (1910). 
+ “On an Entoproctan Polyzoon (Barentsia benedenz) new to the British Isles,” 
Trans. Roy. Soc. Edin. vol. xlvii. p. 835 (1911). 
t “ Résultats du Voy. du S.Y. * Belgica’—Bryozoa,” p. 100 (1904); “ Mar. Biol. 
Sud. Red Sea, pt. 1,” Journ. Linn. Soc., Zool. yol. xxxi, p. 252 (1910), 
