Bottom-Life. 



105 



Membranipora lineata, Lin. 

 Hammerfest (1804 1. 



Membranipora arctiea, D'Obbigny. 

 Kvsenangen, on algae; The North Cape (1894); Nordkyn (1894). 



Membranipora eraiieula, Aldeb. 



On an ascidian near Hammerfest (1894); The Lakse Fiord 

 (collected by Spabbe Schneider). 



Membranipora cymbaeformis, Hincks. 



The North Cape (1894) on algae. 



Membranipora trifolium, S. Wood. 

 The Ostnes Fiord, 50—70 in.; Digermulen, 100—150 m.; 

 Stonesbotn, 40—80 m.; The Joke] Fiord III, 100 m.; Hammerfest 

 (1894). 



Membranipora minor, Busk, 

 pi. in, fig. li). 



Host II, 150 in., on Waldheimia; Moskenstrommen II. 150 m., 

 on Waldheimia; Digermulen, 100 — 150 m., on stone; Malangen, 

 100—200 m., on Waldheimia. 



Lepralia (Membraniporella) nitida, Johnston. 1 ) 

 Kost II, 150 m.; Nordkyn (1894). 



Gephyrotes (Cribrilina) nitido-punctata, Smitt. 

 Moskenstremmen II, 150 m.; Nordkyn (1894). Loven had 

 specimens from Hammerfest. 



Cribrilina eryptooecium, Norman.'-') 

 The Kjolle Fiord (1S94); Nordkyn (1S94). 



Cribrilina annulata, Fabis. 

 The North Cape (1894). 



Microporella ciliata, Pallas. 

 Svolvser (1894), Svserholt (1894). 



Microporella impressa, Audouin. 

 Ingehavet, 300 m., on stones; Breisund. 100 m., on stones. 



Doryporella 3 ) spatulifera, Smitt. 

 Breisund, 10<i m., on Rhynchonella psittaeea. An excellent 

 illustration of the zooecia in this peculiar species, will be found 

 in Watebs (Bryozoa from Franz-Josef Land. Journ. Linn. Soc, 

 XXVIII, pi. 12, fig. 6). 



Harmeria 4 ') scutulata, Busk. 

 Nordkyn (1894), on stones. 



Tessarodoma graeile, M. Sabs. 

 Mortsund III, 100 m.; Digermulen. 100—150 in.; The Sag 



Fiord, 200 m., on dead branches of Isidella hippuris; Tranodybet, 



l ) Cfr. Norman, Finmark Polyzoa. p. 100. 



3 ) Notes on the Natural History of East Finmark. Ann. Mag. Nat. Hist., 

 •Ser. 7, Vol. XII, p. 102. 



3 ) Norman, Finmark Polyzoa, p. 106. 



4 ) Norman, Finmark Polyzoa, p. 107. 



607 — 640 m., on dead branches of Isidella hippuris: Malangen, 

 100—200 m.; Engehavet, 300 m. 



Porina tubulosa, Nobman. 



Hammerfest (1894); The Lakse Fiord (collected by Sparre- 

 Schneider). 



Hippothoa hyalina, Lin. 

 (iroto. o— -24 in., on algae; The Trold Fiord Sund, 30— 40 m., 

 on algae; Breisund, LOO in., on an ascidian. This species has some- 

 times been mentioned as a Schizojiorrllo, sometimes as a CelleporeUa. 



Hippothoa divaricata, Lamouroux. 



Tromso (collected bj Schneider); The Lakse Fiord (collected 

 by Schneider). 



Schizopon lla alderi, Busk. 

 Moskenstrommen, 90 m., on stones; The Ostnes Fiord, 50— 

 70 in.; Hammerfest (1894); lngohavet. 300 in.; Svserholt (1894). 



Schizoporella sinuosa, Busk. 



PI. Ill, figs. 9, 10. 

 Moskenstrommen, 90 m., on stones and Waldheimia; The 

 Ostnes Fiord, 50 — 70 in., on stones and coal; Digermulen, 100— 

 150 m., on stones; Malangen, 100 — 200 m., on Modiola modiolus. 

 Operculum (cfr. fig. 10) presents a divergent appearance from the 

 genus Schizoporella, and the species sinuosa ought indeed to be 

 removed. 



Schizoporella linearis, Hassall. 

 pi. v. fig. 26. 



Moskenstrommen, 90 m.. on shells. 



Schizoporella unicornis, Johnston. 

 PI. V, figs. 23—25, 27. 



„Glea" (Rost), on the beach. 



The specimens from Kost differ somewhat from those I have 

 collected in the Hjelte Fiord, near Bergen, but the variations are 

 not so great as to make a new species necessary. Besides tig. 23 

 agrees well with Hincks' figures in Brit. Mar. Pol. 



On comparing opercula 1 ) of Schizoporella unicornis from the 

 Hjelte Fiord and from Rost, it was found that those from the 

 latter place were somewhat larger. (Cfr. figs. 24. 27). The 

 zooecia in the specimens from Rost also had a rather wider sinus 

 on the proximal edge of the oral aperture. The species has a 

 wide distribution and probably varies very considerably. Lofoten 

 is up to the present the northern known limit, both for unicornis 

 and linearis. 



Schizoporella Candida, Smitt. 



PI. IV figs 6, 7. 



Mollia vulgaris, forma Candida, Smitt. Ofvers. Kgl. Vet. 

 Akad. Forh. L867 (Bihang) pp. 16, L07, pi. 25, fig. 83. 



*) It is practical to measure the maximum breadth (b, pi. V, figs. 2H. 27) and 

 the maximum height (h), when comparing opercula, These measurements may 

 also be found useful in determining species, tor, not taking their absolute value 

 into account, in some species l> will be larger than h (b _ li). in others they 

 will be equal in size (b = h) and in others less (b <^ h). It is also sometimes 

 useful to take similar measurements of the maximum breadth and height of the 

 mandibles. 



