REPORT ON THE POLYZOA. 
9 
§ f 3 . The outermost zooecia in the lateral series the longest ; isolated zooecia opening- 
in the space on the front between the lateral series. 
(6) Idmonea milneana, d’Orb. 
(7) Idmonea irregularis, Meneghini. 
(8) Idmonea jissurata, n. sp. (PL III. fig. 5). 
* 
2. Hornera, Lamx. 
§ a. Zoarium branched, branches free or rarely inosculating. 
§§ a. Ocecia dorsal ; anterior surface of branches reticulato-fibrillate. 
(1) Hornera frondicidata, Lamx. 
(2) Hornera lichenoides, Linn. 
§§ h. Ocecia anterior, either wholly or in part ; surface in front not fibrillated 
or sulcate. 
(3) Hornera violacea, Sars. 
§ (3. Zoarium foliaceous, branches connected by transverse tubules. 
(4) Hornera foliacea, Macgilliv. 
3. Pustulopora, Blainv. 
(1) Pustulopora proboscidea (PI. IV. fig. 1). 
(2) Pustulopora proboscidioides, (PL IV. fig. 4). 
(3) Pustulopora dejlexa, Smitt (Pl. IV. fig. 3). 
(4) Pustulopora regularis, Macgilliv. (Pl. IV. fig. 2). 
1. Idmonea, Lamouroux. 
Idmonea, Lamx., Exp. Meth., p. 80; Defrance, Blainville, M. -Edwards, Jolinst., Lonsdale, 
Reuss, Miclielin, Hagenow, d’Orb, 1852 (pars); Busk, Yan Beneden, Hincks, Smitt' 
(subgenus), &c. 
Crisia (pars), d’Orbigny, Stoliezka. 
Retepora (pars), Goldfuss, Lamk. 
Diastopora (pars) Miehelin. 
Tubulipora (pars), Lamk., Smitt. 
Crisina (pars), d’Orbigny, Smitt. 
Character. — Zoarium erect, free or very partially adnate, branched dichotomously or 
irregularly ; springing from a single tubular cell, having a constricted, basal, discoid 
expansion. Branches free or anastomosing ; orifices of zooecia disposed in parallel or 
subparallel, transverse or oblique, usually alternate series on the sides of the front of the 
(ZOOL. CHALL. EXP. — PART L. 1886.) Ddd 2 
