530 REPORT—1885. 
Group /. FLustRINA. 
Family X. Flustride 
= Flustride, Busk, ‘ Brit. Mus. Cat.’; Gray (pars) 
= Flustride (pars), D’Orb.; Hincks, ‘ Brit. Mar. Polyzoa.’ 
Smitt, ‘ Krit. Fortech. Scandinav. B.’ 
= Escharide (pars), Johnst., ‘ Brit. Zoophites.’ 
Mr Busk in the ‘Chalienger Report’ arranges the genera of this 
family differently from that of Mr. Hincks in his ‘British Marine 
Polyzoa.’ 
Genus Flustra, Linn. 
»  Carbasea, Gray. 
»,  Diachoris, Busk, ‘ Challenger Report.’ 
Mr. Hincks does not separate the species of Carbasea, but includes 
the whole in the genus Flustra, and Diachoris he places in a different 
family. 
The following is Mr. Hincks’s arrangement in his ‘ British Marine 
Polyzoa’ :— 
Family Flustride 
= Escharide (pt.), Johnston, ‘ Brit. Zoophites,’ D’Orb., ‘Pal. Fr.’ 
= Flustridex (pt.), Busk ; Flustride, Smitt. 
‘Zoarium corneous and flexible, expanded, foliaceous, erect. Zocecia 
contiguous, multiserial. Avicularia usually of a very simple type.’— 
Hincks, p. 113. 
Genus Flustra, Linneus 
(for F. papyracea) 
= Chartella, Gray; Carbasea, Gray; Semiflustra (sp.), D’Orbigny. 
‘Zoarium erect, frondose. Zocecia disposed in a single layer, or in 
two layers, united by the dorsal surfaces, more or less quadrangular or 
linguiform, with a raised margin, the aperture occupying the whole or 
a considerable portion of the front of the cell, and closed in by a mem- 
branous covering. Ocecia immersed.’—Hincks, p. 114. 
a. Zoarium in two layers. 
1. Flustra foliacea, Linneus, Hincks, p. 115, pl. xiv. and xvi. 
2 »  papyracea, H/l. & Sol., Hincks, p. 118, pl. xvi. fig. 2. 
3. ,,  securifrons, Pallas, Hincks, p. 120, pl. xvi. fig. 3. 
5 Var. papyracea, Dalyell. : 
4 »  Barleeii, Busk, ‘Quart. Jour. Mic. Soc.’ 1860, p. 123, pl. 
xxv. fig. 4; Hincks, p. 122, pl. v. figs. 6-8. : 
b. Zocecia in a single layer. ‘ 
5. Flustra Carbasea, Hil. & Sol., Hincks, p. 123, pls. xiv. and xvi. 
= Carbasea papyracea, Gray 
= Carbasea, paperea, Busk, Alder 
= Semiflustra carbusea, D’Orb. 
These are the only British species recorded, described, and figured 
by Mr. Hincks. 
