598 Notes on the Natural Hi story of East Finmarh. 



1880. Mcmhranipora pz-mce^;.?, Ilincks, Brit. Polyz., lutroduction, 



p. Ixxiii, woodcut xxxv. 

 1880. Me7nbr(mipora minax, Hiiicks, Brit. Polyz., lutroduction, 



p. Ixxi, woodcut XXX. a, and p. 169, pi. xxii. figs. 2, 2 a-c. 

 1891. liampkonotus minav, Norinau, " A Mouth oq the Troudhjom 



Fiord," Ann. & Mag. Nat. Ilist. ser. 6, vol. xiii. p. 122. 



Svserholt, East Finmark [Nordgaard] . Specimens iti my 

 collection are from Slietland; Bergen and Trondhjcra Fiords, 

 Norway {A. M. N.) ; Gulf of St. Lawrence {Wluteaves). 

 The specimens from the St. Lawrence have the zooccia of 

 very much larger size than those from the other localities. 



It escaped my memory Avhen I was writing my Trondhjera 

 Fiord report that Hincks had, in the introduction to his work, 

 called attention to the remarkable avieularium in this species, 

 and had given the form in which the avieularium is fully de- 

 veloped a different specific name (M. princeps, see p. Ixxiii, 

 note) ; but a comparison of his woodcuts xxx. a and xxxv. will 

 indicate, what is really the case, that the latter is only the 

 more developed state of the former; and although on many 

 polyzoaries only the first form will be found, the latter 

 occurs both on Shetland and Norwegian specimens in my 

 collection. The avicularia are very easily abraded in this 

 s[)ecies ; and polyzoaries always have far more of the holes 

 which indicate where avicularia have been than avicularia 

 actually present (see Hincks, pi. xxii. fig. 2 ; no perfect 

 avieularium is here shown) . 



DESCRIPTION OF PLATE XIII. 



This Plate is chiefly occupied with figures of the backs of certain 

 species in order to illustrate the pore-chauibers. They must be regarded 

 as in a great measure diagrammatic ; for whereas in some species the 

 pore-chambers are seen very easily, in other cases they are so hidden in 

 the side walls that they are very difficult to observe. 



Fig. 1. Pore-chambers of Cauloramphiis spinifer. 



2. „ „ Callopora lineata. 



3. ,, „ Vdllopora craticula. 



4. „ „ EUisina levata. 



5. ,, ,, Amphiblestrum FlemhKjii. 



6. ,, „ Amphiblestrum trifoUum. 



7. „ „ Ramphonotus minax. 



8. „ ,, Aldcrina solidula ; a young zocecium at the edge 

 of a zoarium. 



9. Zoceciuni of Callopora Whiteavsii, sp. n. 



10. Zocecium of Callopora uiiicornis, var. armifcra, Hincks, with the 



usual avicularia. 



11. Zocecium of the same, the last with gigantic avieularium on 



oceciHUi. 



12. Oochilina tensa, sp. u. 



