KONGL. SV. VET. AKADEMIENS HANDMNGAR. BAND 25. N:O 9. 103 



NONIONINA ,,-OBB. 



N. umbilicatula MONTAG. 



Tab. XVII, figg. 823824. 



Nitida, interdum pellucida, nunc subdepressa, nunc paullura inflata, umbilicata aut 

 suburnbilicata, margins rotundato, segmentis 9 12, suturis vix impressis; facie septali 

 convexa, semilunari; apertura snturali, marginal!, angusta, poris mediocribus; interdum 

 foveolis septalibus minutis provisa. Aliquando e particulis arenaceis et calcareis immixtis 

 constructa, Haplophragmio similis. 



Fig. 823: e sinu Bergensium Norvegiae, profund. metr. 200; a: facies marginalis 

 oralis. 



Fig. 824: calcareo-arenacea e Gulhnaren sinu Bahusioe profund. metr. 70. 

 vi :i > .j 



Naut. umbilicatulus MONTAQ, 1803, Test. Bril., p. 191, Supplera. 1808, p. 78, t. 18, f. 1. 



Non. Soldanii D'ORB., 1846, Bass. tert. Vienne, p. 109, t. 5, ff. 15 16 (in N. pompilioidem vergens). 



COSTA, 1854, Pal. Nap. 2, p. 201, t. 17, f. 11 (item). 



falx GZJZ, 1847, For. Wieu. Beck., Haid. Nat. Wiss. Abh. 2, p. 142, t. 12, ff. 3031. 

 polystoma COSTA, 1854, Pal. Nap. 2, p. 206, t. 14, f. 10. 



crassula PARK. & JONES, 1857, For. Norw. A. M. N. H. (2) 19, p. 286, t. 11, ff. 56. 

 Barleana WILLIAMS, 1858, Rec. For. Gr. Brit., p. 32, t. 4, ff. 68 69. 

 bathyomphala Rss, 1862, Nordd. Mils u. Gault, Wien. Ak. S. Ber. 46, p. 95, t. 13, f. 1. 

 Polystom. crispa var. umbilieatula PARK. & JONES, 1865, N. All. & Arct. Oc., Phil. Trans. 155, p. 405, 



t. 14, f. 42, t. 17, ff. 5859. 



Non. formosa SEG., 1879, Koram. terz. Prov. Reggia, Atti Accad. Lincei (3) 6, p. 63, t. 7, f. 6. 

 umbilicatula BRADY, 1884, Chall. Rep. 9, p. 726, t. 109, ff. 89. 



BRADY, PARK., JONES, 1887, Abrohlos Bank, Trans. Zool. Soc. Loud. 12, 7, t. 43, f. 19. 

 , 



Hab. ad oras occidentals Svecise et Norvegise metr. 40 180 frequens, ad Spetsbergiam metr. 180 1,250 fre- 

 qventissima. 



N. depressula WALK. & JACOB. 



Tab. XVII, figg. 825-826. 



Discoidea, margine plerumque rotundato, aliquando submarginata, umbilicis haud 

 multum aut vix excavatis subgranulosis; interdum suburnbonata; segmentis 7 11 14, 

 suturis ssepe impressis, urnbilicum versus saepe stellate exca\tis, aut sublimbatis; ple- 

 rumque hyalina, poris rninutis creberrimis; a Polystomella striatopunctata interdum 

 difficile distingvenda. 



Fig. 825: e rnari Germanico, in fonnam sequentem vergens; a: facies later, oralis. 



Fig. 826: e mari Groenlandico; a: facies later, oralis. 



Naut. depressulus WALK. & JAC., 1798, Adams Essays microsc., p. 641, t. 14, f. 33. 



Non. perforata, granosa, punctata D'ORB., 1846, Bass. tert. Vienne, p. 110, 111, t. 5, ff. 17 22. 



crassula WILLIAMS, 1858, Rec. For. fir. Brit., p. 33, t. 3, ff. 70 71. 



afflnis Hss, 1851, Sept. Thon. Bcrl., /eitschr. dcut. geol. fies. 3, p. 72, t. 5, f. 32. 



Polystom. crispa var. (Non.) depressula P.VRK. & JONES, 1865, North Atl. & Arct. Oc., Phil. Trans. 155, 



p. 403, t. 14, I. 39. 



