CELLULAEINE AND OTHER POLYZOA. 315 
Jlahellata, Gray, 1848, p. 106 (see Avicidaria) ; and the correct name of the 
genotype is thus Ornithoporina flabellata (Thomps., MSS.) (Gray). In the 
second work cited D'Orbigny includes two other species as well. Synonym of 
Avicidaria, Gray, 1848 (with the same genotype) and of Bugula, Oken, 1815. 
Petalostegus, Levinsen, 1909, pp. 97, 114. — Genotype (the only species), PefcdnsUgus 
hicornis {Catenaria bicm-nis, Busk, 1884, p. 14). 
Planicellaria, D'Orbigny, 1852, A. S. N". (3) svi. pp. 333, 338; P. F. T. C. pp. 26, 
36, 181. — Genosyutypes, P. oculata and P. fenestrata, two fossil species, 
apparently belonging to diiierent genera. 
Poricellaria, D'Orbigny, 1852, A. S. N. (3) xvi. p. 338 ; 1854, P. F. T. C. p. 1106.— 
Genotype, selected by the author, Poricellaria alata, D'Orb., n. sp. Canu, 
1907, Ann. Paleont. ii. p. 142 (sep. p. 38) regards Diplodidymia, Eeuss, 
1869, as a synonym of this genus ; and he describes and figures a specimen 
which he refers to D. alata (D'Orb.). 
Betiflustra, Levinson, 1909, pp. 124, 125, 414. — Genosyntypes, li. schonatii. Lev., n.sp., 
Carbasea cribriformis, Busk, 1852 ", p. 51 {Retepo7-a cornea, Busk, 1852 ', p. 380) 
and Plustra reticulum, Hincks, 1882, A. M. N. H. (5) x. p. 163. (ienotype, 
now selected, Retijiustra cornea (Busk). 
PJiabdozoum, Hincks, 1882, A. M. N. H. (5) x. p. 1 60. — Genotype (the only species), 
Rhabdozoum wilsoni, Hincks, n. sp. 
Saccohydra, Billard, 1914, 2" Exp. Antarct. Frang., Hydroides, p. 5. — Genotype (the 
only species), Saccohydra problematica, Billard, n. sp. Prof. Billard recently 
wrote to me informing me that he had ascertained this genus, described as a 
Hydroid, to be a synonym of Barentsia. There is no doubt, from his figures, 
that this conclusion is correct, and that Saccohydra is to be regarded as one of 
the Entoprocta, and as a synonym of Barentsia, Hincks, 1880, A.M. N. H. (5) 
vi. p. 285. I publish this note at Prof. Billard's request. 
Salicornaria, Schweigger, 1819, Tab. 8 ; 1820, p. 428. — This genus is usually 
attributed to Cuvier, 1817 (Eegne An. iv. p. 75), who introduced it, in the 
form " Salicorniaires," for Celhdaria salicornia (Pallas, 1866, p. 61), and 
three other species referable to Tubucellaria and Menipea. Schweigger seems 
to have been the first to use the form Salicornaria, while he maybe considered 
to have selected the genotype by including only one species, S. dichotoma 
{Celhdaria salicornia. Pall.). If Cellaria {q. v.) is accepted, Salicornaria 
becomes a synonym of that genua. 
Salicornia, de Blainville, 1830, p. 419 ; see also 1834, p. 455. — De Blainville gives 
this as Salicornia, Cuv., although Cuvier did not use it in this form, and he 
includes two species, Cellularia salicornia. Pall, (see Salicoriiaria) and Gellaria 
salicornioides, Lamouroux (1816, p. 127, but not in Cuvier's list). Salicornia 
is merely another form of Salicornaria. 
Salicorniaria, Schinz, 1825, Das Thierreioh, iv. p. 155. — Another variant of the same 
name, the species included being those of Cuvier's original list (see Sali- 
cornaria), with some additional synonyms. The genus is used in the same 
form by Templeton (1836, Loudon's Mag. Nat. Hist. ix. p. 469). 
