A. W. WATERS—REPORT ON THE BRYOZOA. 141 
operculum, and doubtless Farciminaria and Membranipora are closely allied. 
Lareiminaria magna, B., has about 28 tentacles. 
M. limosa is much like Quadricellaria oblonga, d’Orb., from the Chalk. 
Loc. * Abundant in patches on the otherwise mud bottom of the Khuro,” 
Khor: Shinab, Red Sea, 10-12 fath. (3), and Khor Dongola, 20 fath., mud 
(2, 5), collected by Crossland. 
THALAMOPORELLA Rozrert (Audouin). (Plate 15. figs. 12-15.) 
Flustra Rozieri, Aud. Zool. Egypte, p. 239, pl. 8. fig. 9. 
Thalamoporella Roziert, Wincks, Ann. Mag. Nat. Hist. ser. 5, vol. xix. p. 164; Waters, 
Ann. Mag. Nat. Hist. ser. 5, vol. xx. p. 186; Kirkpatrick, Ann. Mag. Nat. Hist. ser. 6, vol. i. 
p. 75. 
Reptescharellina Roziert, d’Orb. Pal. Frang. vol. v. p. 453. 
Membranipora Rozieri, Busk, Brit. Mus. Cat. ii. p. 59, pl. 65. fig. 6; MacGillivray, 
Monog. of Tert. Polyzoa of Victoria, p. 52, pl. 6. fig. 10 (1895). 
Steginoporella Roziert, Smitt, Floridan Bry. p. 16, pl. 4. fig. 102. 
Steganoporella Rozxert, Hincks, Ann. Mag. Nat. Hist. ser. 5, vol. vi. p. 379 (28). 
Steganoporella Snutin, Hincks, Brit. Mar. Pcly. p. 178, pl. 24. fies. 5, 6 (1880) ; Gold- 
stein, Bry. from the Marion Island, Proc. Roy. Soc. Victoria, p. 7 note (1881). 
Thalamoporella Smuttn, Hincks, Journ. Linn. Soc., Zool. vol. xxi. (1887) p.123; Thornely, 
Ree. Indian Mus. vol. i. pt. 3, no. 15, p. 187 (1907). 
Steganoporella Rozert form indica, Hincks, Ann. Mag. Nat. Hist. ser. 5, vol. vi. p. 379 
(29), pl. 16. fig. 1; Waters, Q. J. Geol. Soc. vol. xxxvili. (1882) p. 505, vol. xli. (1885) 
p. 292; Philipps, “ Loyalty Island,” p. 440 (1889) ; Thornely, “‘ Manaar,” p. 112 (1905). 
The small tuberosity at the side of the aperture is very variable, and in 
specimens from Khor Dongola the knobs are sometimes developed, but not 
always, and are but small ; again, in those from Rasel Millan they are occa- 
sionally seen where the walls meet, while in specimens from the Cape Verde 
Islands they are practically absent. Hincks created a variety indica for 
those forms without a tuberosity; but this form is general from the Cape 
Verde Islands, through the Red Sea, Manaar, to Australia, recent and fossil. 
The size of the zocecia in all that I have seen is about the same. The ring- 
canal is very large, and the ovarian cells are surrounded by a coarse network. 
In the ovaria of most Bryozoa the ovarian cells are quite close together, and 
are surrounded by the follicle-cells, as figured by Vigelius * and others, but 
in some species these ovarian cells are partly surrounded by a coarse cellular 
network. ‘This structure must probably be compared with what I have 
described in a species of Alcyonidium fT. 
There are 17-19 tentacles. 
* Vigelius, W. L., “ Die Bryozoen .... des Willem Barents,” Bijdr. tot de Dierkunde, 
vol. xi. pl. il. fig. 39 (1884). 
+ “Bryozoa from Franz Josef Land,” Journ. Linn. Soc., Zool. vol. xxix. (1904) p, 180, 
pl. 20. figs. 8, 9, 10. 
IRS 
