104 
THE VOYAGE OF H.M.S. CHALLENGER. 
Onchoporella bombycina, Busk. 
Carbasea bombycina, Bk. ( nec . Solander, &c.), Brit. Mus. Cat., vol. i. p. 52, pi. xlviii. figs. 4-7. 
Flustra bombycina, Linn., Syst. Nat., Ed. 13, 3828, No. 9, 
„ „ Bose, Vers 141 ; Lamx., Hist, des Polyp., p. 103, No. 196 ; Exp. M6th. 
p. 3, pi. iv. fig. B. 
,, „ Lamarck (?); Krauss, Zooph. d. Siidsee, p. 35. 
Semiflustra bombycina (1), d’Orb. 
(?) Lepralia diadema, Macgilliv. 
Character. — Zoarium composed of narrow, ligulate, short lobes, expanding at the ends. 
Zooecia pyriform, cylindrical, rounded in front. Lateral fenestrse with from one to four 
perforations in a vertical line. Ooecia prominent, with radiating lines. 
Habitat. — Simon’s Bay, Cape of Good Hope. 1 
Family XVII. Reteporida:. 
Reteporidce, Smitt, 1867; Hincks, 1879. 
Escharidce (pars), d’Orb., 1851; Hincks, 1880; Smitt, 1872; Brit. Mus. Cat., 1852; Busk, 
Crag Polyz., 1859, Macgilliv., Auctt. 
Character. — Zoarium calcareous, erect, fixed ; foliaceous and fenestrate, unilaminar ; 
or reticulately or freely ramose in one plane. Zooecia secund. 
The Family here contains the following genera : — 
1. Retepora, Imperato. 
§ a. reticulates. 
(1) Retepora apiculata, n. sp. (PI. XXY. fig. 6). 
(2) Retepora producta, n. sp. (PI. XXV. fig. 7). 
(3) Retepora denticulata, n. sp. (PI. XXVI. fig. 1). 
§ ft. fenestrates. 
§§ l - 2 
(4) Retepora imperati, Busk, MS. (PI. XXVI. fig. 9). 
(5) Retepora tessellata, n. sp. (PI. XXVII. fig. 8). 
var. a. ccsspitosa (PI. XXVII. fig. 6). 
var. b. pubens (PI. XXVIII. fig. 3). 
1 Scruparia diapliana, Busk (Quint. Journ. Micr. Soc. [Zoophytology], vol. viii. p. 281, pi. xxxi. fig. 1, 1861) would 
form a second species of Onchoporella. 
3 Under this section might perhaps be included the very interesting Petralia undata of Macgillivray as a sub-genus. 
