REPORT ON THE POLYZOA. 
141 
13. Tessaradoma, Norman. 
Tessaradoma boreale (Busk) (PI. XXIV. fig. 8). 
14. Gemellipora, Srnitt. 
(a) Erect and ramose. 
(1) Gemellipora glabra, Srnitt (PI. XXV. fig. 3). 
( b ) Adnate. 
(2) Gemellipora cribritheca, n. sp. (PL XXXIII. fig. 5). 
§ 1. Lower lip of primary orifice entire. 
Primary mouth persistent, lower border entire usually straight ; operculum semi- 
circular. Oral avicularia, when present, median, and external to the peristome. 
§§ a. Erect, bilaminar. 
1. Eschara, Pallas. 
Esclmra (pars), Ray, Joknst., Lamk., d’Orb., Busk, Smitt, Milne-Edw., &c. 
Cellaria (pars), Reuss. 
Acropora (pars), Reuss. 
Lepralia (pars), Hincks, Smitt, &c. 
Character. — Zoarium erect (sometimes decurrent) ; foliaceous or ramose compressed, 
bilaminar. 
(1) Eschara elegantula, d’Orbigny (PI. XX. fig. 6). 
Eschara saccata, Bk., Ann. Nat. Hist., ser. 2, vol. xviii., p. 33, pi. 1. fig. 5, 1856; Sars. Beskr. o. n. 
Norske Polyzoer, p. 6, 1862. 
? Eschara elegantula, d’Orbigny (teste Smitt), Palseont. Frang., p. 102; Smitt, Kritisk Eorteckn., 
pp. 24, 154. 
Character. — Zoarium (of considerable size), branched dichotomously in one plane, 
branches of various breadths, widening at the ends. Zooecia cylindrical or barrel-shaped, 
orifice terminal, horizontal (looking directly upwards) arcuate. The front of zooecium 
nearly entirely occupied by a large pouch-like avicularium, with a semicircular mandible, 
pointing forwards. Ooecia immersed, convex cucullate. The entire surface smooth and 
shining. 
Habitat. — Station 48, lat. 43° 4' N., long. 64° 5' W., 51 fathoms, rock. 
[Banks of Newfoundland, d’Orbigny; Spitzbergen, Greenland, Finmark, Forell, Sars, 
M £ Andrew.] 
(2) Eschara gracilis, Lamarck (PI. XXL fig. 6). 
Eschara gracilis, Lamk.; Lamx.; Blainv. ; Milne-Edw. ; Brit. Mus. Cat., Macgilliv., &c. 
Cellaria and Acropjora coronata, Reuss. 
I Eschara buskii, Tenison Woods, Journ. Roy. Soc. Viet. 
