the Trondhjein Fiord. 125 



This genus comes very near to }[ucroncUa^ but diffL'is in 

 the absence of the denticle (" lyrula"). Ilincks placed the 

 type in Lepralia, but with doubt. Discopora stenostovia, 

 omitt, is also referable to this genus. 



On a stone from deep water, Rijdberg. Other specimens 

 in ray collection are the types from Shetland, 70-100 fath. ; 

 the Minch ; Greenland (•Valorous'' Ewped.) ; Parry's Island, 

 Si)itsbergen, 20-70 fath. {Smitt, as "Discojwra emucronata "). 



12. Schizoporella Alderij Busk. 

 Deep water, llodberg. 



13. Schizoporella linearis, Hassall. 

 On stems of Hydroids, Rodberg. 



14. Mucronella ventrtcosa, Hassall. 

 On a stem, deep water, Rodberg. 



15. Mucronella abi/ssicola, Norman. 

 With the last. 



16. Mucronella laqueata, Norman. 



Disco/iora coccinea, forma ovalis, Smitt, " Krit. Forteck. &c.," ffifveis. 

 at" K. Vet.-Akad. Foihaiid. 1867, p. 27 (separate copy), pi. xxvii. 

 tig. 175 (vix fig. 174, quae forsan ad Mttcronellam abyssicolam refe- 

 renda est). 



Precipices, Rodberg, on stone. 



17. Porella compressa, Sowerbj. 

 On the precipices, Rodberg. 



18. Porella concinna, Busk. 

 On shell, 40 fath., Rodberg. 



19. Porella bella, Busk. 



1860. Lepralia hella, Busk, Quart. Joiirn. Micr. Sci. vol. viii. p. 144, 

 pi. xxvii. ligs. 2, 3. 



1868. Escharella Landshorovii, Smitt, '' Krit. Forteck. &c.," Qilfvers. 

 K. Vet.-Akad. Forhand. 1807, p. 12 (separate copy), pi. xxiv. figs. 60- 

 65 (nee figs. 66, 67, uec Lepralia Landshorovii, Jolmston). 



1880. Smittia hella, Hincks, Brit. Pol. p. 352, pi. xlii. figs. 7 and 9. 



1880. Porella concinna, Hincks, var. gracilis, ibid. p. 324, pi. xlvi. fig, 9. 



1889. Porella concinna (nee Busk), Hincks (partim), " Polyzoa St. Law- 

 rence," Ann. & Mag. Nat. Hist. ser. 6, vol. iii. p. 428, pi. xxi. fig. 4. 



Zocecia generally elongated — longer iu proportion to breadth 



