of Norway and Finmark. 33 



3. Fain. Escharad.*:, Busk [B. M. Vat. p. 88). 

 1. Escharu, Ray (B. M.Cat. p. 89). 



1. E. teres, uob. (n, sp.j. PI. I. lig. 2. 



Polyzoary composed of distant, cylindrical, terete branches. 

 Cells ovate, ininiersed, their outline being indicated by a single 

 row of minute punctures. Mouth arcuate above, with a simple 

 straight lower li]), within which is an avicularium with an orbi- 

 cular mandible. 



2. E. Skenei (var. tridens), nob. (n. sp.). PI. I. tig. 3. 



Polyzoary composed of short, flattened, expanding branches 

 dilated at the ends. Cells distinct, elongated. Mouth subor- 

 bicular, horizontal, protected in front by a tritid process con- 

 sisting of a central (unarmed ?) rostrum and an elevated avicu- 

 larium on either side (PI. I. tig. 3 c). 



3. E. saccaia, nob. (n. sp.). PI. I. fig. 5. 



Polyzoary composed of elongated flattened branches dilated at 

 the ends. Cells (in the growing portions) furnished with a 

 strongly projecting avicularium, in the form of an elongated sac 

 or pouch which covers nearly the whole front of the cell (PI. I. 

 fig. 5 b). Mandible rounded. 



4. E. rosacea, nob. (n. sp.). PI. 1. fig. 4. 



Polyzoary composed of short, somewhat undulating or con- 

 torted, expanding lobes. Cells deeply immersed, broadly ovate, 

 surface granulated. Mouth rounded or arcuate above, with a 

 sinus in the middle of the lower lip. An avicularium placed 

 obliquely on one side close to and slightly projecting over the 

 margin of the mouth. 



In the younger cells the avicularium is seen distinctly pro- 

 jecting above the surface of the cell, but in the older and thick- 

 ened parts of the polyzoary its extremity only is seen within the 

 depression leading to the mouth of the cell (PI. I. fig. 4 c). 

 Young specimens {b, h) are of a delicate rose-colour and simple 

 form. 



2. Retepora, Imperato (B. M. Cat. p. 93). 



1 . R. cellulosa, Linn. (B. M. Cat. p. 93. pi. 121 . figs. 3-8; pi. 123. 



figs. 5, 6). 



A small fragment only occurs. 



2. R. beamana, King (B. M.Cat. p. 94. pi. 123. figs. 1-5). 



Apparently very abundant. 

 Ann. 6)- Miiff. N. Hist. Ser. 2. Vol. xviii. 3 



