ON RECENT POLYZOA. 539 
42. Membranipora delicatula, Busk, pl. xi. fig. 1.  Biflustra, ¢d.,. 
Crag Polyzoa. ? Biflustra deliculata, Smitt. 
‘Florid. Bry.’ (Not. M. deliculata, Bush.) 
43. a trifolium, S. Wood. Var. minor, Hincks, pl. xi. 
fig. 6. Loc.: Bahia ; on shell. 
4A. 5 antiqua, Busk, pl. xi. fig. 7. Busk, ‘Quart. Jour. 
Mic. Soc.’ vol. vi. p. 262, pl. xx. fig. 12. 
c. With a membranous front wall, the orifice surrounded by a border. 
Operculum with a distinct hinge. 
45. Membranipora mamillaris, Lamz., pl. x. fig. 9. Loc. : Australia. 
46. ‘2 transversa, Hincks, pl. xi. fig. 9. Seems to be 
nearly related to M. Woodsui, Macgil. 
a. With a membranous front wall." 
47. Membranipora coronata, Hincks, p. 147, pl. x. fig. 1. Loc.: Singa- 
pore ; on coral. 
48. - terrifica, Hincks, pl. viii. fig. 5. Loc.: Straits of 
Magellan; on Eschara flabellaris, Busk. 
49, 3 rubida, Hincks, pl. viii. fig. 6. Loc.: Australia; on 
stone. 
50. ty bicolor, Hincks, p. 148, pl. ix. fig. 1. Loc.: West 
Australia. 
d51. va bellula, Hincks, p. 149, pl. viii. figs. 4, 4a, 40. 
dla. EF re Var. a, bicornis. 
51d. 3 » £, maulticornis. Loc.: Normal and 
var. 3, Australia, Ceylon; var. a, Madagascar, 
St. Vincent, Cape Verd Islands. 
b. With a calcareous lamina. 
52. Membranipora patula, Hincks, p. 150, pl. ix. fig. 4. Loc. : Cali- 
fornia. 
53. i setigera, Hincks, pl. viii. fig. 3. Loc.: Australia, 
investing Serpula. M. setigera belongs to the 
same section of the genus as our own British 
species, M. Rosselii and M. trifolium. 
54, 5 spinosa, Quoy and Gaimard. 
= flustra, id., Quoy and Gaimard, ‘ Voy. de l’Astro- 
lobe.’ 
= M. ciliata, Macgil, Transac. 
= M. spinosa, Busk, ‘ Polyzoa of Kerguelen Island.’ 
D’Orb. describes a species of M. spinosa (‘ Voy. 
dans l’Amér.’) which bears a close resemblance 
to M. spinifera, Johnst. Loc.: Kerguelen Island ; 
Australia; Arabian Sea, between Bombay and 
Aden. 
50. 3 permunita, Hincks, p. 151, pl. x. fig. 2. Loc.: Off 
Curtis Island, Bass’s Straits. 
56. 2 denticulata, Macgil. pl. viii. fig. 2 
= Caleschara, 7d., ‘Prod. Zool. Vict.’ 
1 Continuation of Papers by Mr. Hincks, Ann. Mag. Nat. Hist., Feb. 1881. 
