20 
THE YOYAGE OF H.M.S. CHALLENGER. 
0T7 to 0‘2 mm., which are disposed irregularly in circular whorls, about 1 mm. apart; 
surface rough, punctate, even, with very faint indication of longitudinal striation. 
Habitat . — Off Marion Island, 50 to 75 fathoms. 
(3) Pustulopora deflexa, Smitt (sp.) (PL IV. fig. 3). 
Entalophora deflexa , Smitt, Florid. Bryoz., vol. i. p. 11, pi. v. figs. 28-30; Waters, Ann. and 
Mag. Nat. Hist., ser. 5, vol. iii. p. 274. 
Pustulipora deflexa, Johnst., p. 279, pi. xlviii. fig. 5; Norman, Rep. Brit. Assoc., 1868, p. 310; 
Marion, Ann. d. Sci. Nat., ser. 6, t. viii. p. 1 ; Joliet. 
Pustulopora deflexa, Heller, Adriat., p. 125. 
1 Tubulipora deflexa, Couch, Corn. Fauna, vol. iii. p. 107, pi. xix. fig. 4. 
1 Stomatopora deflexa, Hincks, Brit. Mar. Polyz., p. 437, pi. lvii. fig. 4. 
1 Pustulopora clavata, Busk, Crag Polyzoa, p. 107, pi. xvii. fig. 1. 
Character. — Zoarium composed of very irregular furcate branches, 1 to 1'2 mm. in 
diameter, constituted of very long cylindrical or very slightly terete ascending zooecia, 
often crowded together in fasciculate bundles and varying greatly in length ; slightly 
produced orally, the produced portion curving slightly outwards ; surface granular or 
uneven, sometimes transversely rugose, about 0'2 mm. in diameter. Ooecia ? 
Habitat . — Station 151, off Heard Island, 75 fathoms, volcanic mud. 
[South coasts of Britain ; Shetland, Norman ; Gulf of Florida, Smitt ; Bay of Naples, 
Waters; Adriatic, Heller; Marseilles, Marion; Roscoff, Joliet.] 
A peculiar feature of this species is the great disposition of the zooecia to be 
collected into fasciculate bundles, somewhat in the same way apparently as they are 
described by Mr. Hincks in his Stomatopora fasciculata, from which, however, it differs 
in other more important particulars, such as the perfectly free and erect habit, and to 
judge from Mr. Hincks’s figure, the less diameter of the zooecial tubes, and their less entire 
immersion or connation. In Stomatopora fasciculata, moreover, the zoarium is described 
as having a dense and smooth surface and a dark brown colour. 
Mr. Couch’s description of Tubulipora deflexa is far too incomplete to afford any 
assistance towards its determination, and his figure is still less reliable. All he says is 
that the zoarium is erect, cylindrical, with waved tubes projecting from all parts. Mr. 
Hincks, however, states, with respect to his Stomatopora deflexa, that the “ zoarium is 
in great part adherent ; with linear branches expanding very slightly upwards, the 
extremities free, erect, subclavate. The zooecia slender, disposed in pairs along the 
creeping portion, and semialternate or alternate, the oral extremity free, bent upwards, 
and projecting considerably.” To this it may be added that Mr. Hincks rejects 
Professor Smitt’s Entalophora deflexa as a synonym of his Stomatopora deflexa. So 
that on the whole it seems extremely doubtful what name should be assigned to the form 
here described, with respect to which all that appears to me to be certain is that the 
specimens (mere fragments) in the Challenger collection are identical with the form 
