NILS HJ. ODHNER 



(1917)^ are still impossible to state definitively, but the essential 

 qualities are the absence of gizzard plates, parapodia and jaws 

 and the presence of a narrow radula, tri- or uniseriate. In these 

 respects, the family is well distinguished from Scapliandridae. 



Diaphana hyalina Turton. Vadsø, 40—60 fms, numerous 

 sps., max. 1. 4 — Manger, Strömsund, among Confervae, 1 

 sp., 1. 3. 



Diaphana hiemalis Couthouy. Vadsø, 40—60 f ms, numer- 

 ous sps., max. 1. 3.8. Together with the typical form there 

 occur specimens of D. globosa Loven combined with the type 

 by transitional stages, thus indicating that the atter is a variety 

 of the former as G. 0. Sars (1878) has supposed it to be. Most 

 of the specimens have the characters of D. glohosa, i. e. a 

 distinct umbilicus, and a slighter curve of the outer lip above 

 the middle. 



Diaphana expansa Jeffreys. Duseviken, Stavanger, 40 — 50 

 fms, 1 sh., I. 3.5. 



Fam. Acer id ae. 

 Acera hullata Mütleer. Øxfjord, 5 sps., max. 1. 12 (shell) 

 (Sparre Schneider) — Tromsø (Sparre Schneider), 8 sps., max. 

 1. 14 (sh.)— Molde, 2 sps., max. U 7.5 (sh.)— Skjaergehavn 

 (Appelløf Aug. 1898), 1 sp. 1. 8— Kvitingsø, 12—20 fms, 3 sps., 

 max. I. 10 (sh.) — Flekkefjord (Engh 1878), numerous sps.. max. 

 1. 15 (sh.) — Sandefjord, many sps., max. 1. 12 (sh.) — Kristiania- 

 fjord (Kiaer), many localities. 



Fam. Philinidae. 



Philine aperta Lcnné. Tjøtø, some very small young sps. — 

 Stavanger, 1 small sp. — Risevik, Jaederen (Hjort Vs 1898), 0—4 

 fms, 3 sps., max. I. 26.5 — Egersund, 2 sps., max. 1. 18 — Lods- 

 havn, 5 sps., max. I. 5.5— Maerdø, many sps., max. 1. 28 — 



^ Rechercties zool. et anat. sur les moll. Amphineures et Gastéropodes. 

 Deuxième Expéd. antarct. Française (Charcot). 



