A. W. WATERS—REPORT ON THE BRYOZOA. A 
AMATHIA TORTUOSA, Tenison- Woods (non Busk). (Plate 24. fig. 5.) 
Amathia tortuosa, Tenison-Woods, Proc. Roy. Soc. Vict. vol. xvi. (1880) p. 89, fig. 6; 
MacGillivray, Prod. Zool. Vict. dec. xix. (1889) p. 308, pl. 185. fig. 3; Proc. Roy. Soe. 
. Viet. vol. vii. (1894) p. 134, pl. A. fig. 4. 
Amathia conneva, Busk, Polyzoa, Zool. Chall. Exp. vol. xvii. (1886) pt. 1, p. 35, pl. 6. 
fig. 5. 
The specimens from the Sudan are about the same size as that figured by 
Tenison-W oods, but are a trifle smaller than the ‘ Challenger’ A. conneva, B. 
The stem is about 0°2 mm. diam., and the wall is thin and transparent. The 
zoecia are arranged spirally round the upper two-thirds of an internode. 
A. distans, B. (Pl. 24. fig. 7), A. tortuosa, T.-Woods (fig. 5), A. brasiliensis, 
Busk, and A. semiconvoluta, Lamx. (fig. 6), all form an incomplete 
spiral round the stem and only occupy part (more than half) of the 
internode, and from the descriptions determination is most difficult. 
However, the stem of A. distans is thin (0°12 mm. diam.) and chitinous ; 
A. tortuosa has a colourless transparent stem much thicker (0-2 mm. diam.), 
whereas A. semiconvoluta has a dark chitinous stem (0°25 mm.), being 
altogether a larger species. A. convoluta, A. semiconvoluta, A. spiralis all 
have long zocecia. 
Loc. Port Jackson (7. W.) ; New South Wales (MacG.) ; off Cape York 
(B.) ; from s.s. ‘ Thyra’ docked in Suez from Mediterranean (9), collected 
by Crossland. 
ZOOBOTRYON PELLUCIDUM, Lhrenberg. (Plate 4. fig. 12, 15.) 
Zoobotryon pellucidus, Ehrenberg, Symbole Physics, pt. ii. Evertebrata (there is no 
paging), pl. 11. fig. 10 (1831) ; Reichert, “ Vergleichende anatomische Untersuchungen iiber 
Zoobotryon pellucidus,” Konig. Akad. Wissensch. Berlin, 1870; Phillips, Willey’s Zool. 
Results, pt. iv., Cambridge, p. 450 (1899). 
Hydra verticillata, Delle Chiaje, ‘Memorie sulla storia e notamia degli animale senza 
vertebre del Regno di Napoli,’ vol. iii. (1828) p. 203, pl. 47. figs. 1, 2. 
Zoobothryon (sic) verticillatum, Delle Chiaje, “ Desc. e Notam. degli anim. invert. della 
Sicilia citiore osservati vivi negli anni 1822-30,” vol. v. p. 142, vol. vi. (1841) pl. 79. figs. 1, 2. 
Hyalosiphen verticillatus, v. Martens, Ital. p. 453 (1844). 
Serialaria Couthini, F. Miller, Troschel’s Arch. fiir Naturgesch. vol. i. (1860) p. 311, 
pl. 18. figs. 1-7. 
Mediterranean :—A. LENDIGERA, L.; A, SEMICONVoLUTA, Lamx.; A. Vipovict, Hell. 
Red Sea:—A. Torruosa, Woods. 
Indian Ocean and Zanzibar :—A. pisrans, B.; A. sEmMiconvoLura, Lamx.; A. Vipovict, 
Hell. 
Australian :—A. cornuta, Lamx.; A. Brongniartii, Kirkp.; A. BiseRtata, Krauss; 
A. pisTAns, B.; A. spiralis, Lamx.; A. obliqua, MacG.; A. pinnata, Kirkp.; A. rortuosa, 
Ten.-Woods ; A. plumosa, MacG. ; A. bicornis, T.-Woods ; A. convoluta, Lamx. ; A. Woodsii, 
Goldstein; A. LENDIGERA, L. 
S. Africa :—A. BISERIATA, Krauss. 
