ODHNER, MARINE MOLLUSCA OF ICELAND 7 



Natica claiisa Broderip & Sowerby. 



Arnanes, in fish stomachs, 3 sps., max. h. 13 — Beru- 

 fjord, 9 — 40 fms, corals, sand, clay, numerous sps., max. h. 16 

 — Biarnanes, 15 — 30 fms, corals, 1 sp. (t), h. 10 — Hofsos, 

 40 fms, clay, 9 sps. (f, 1 living), max. h. 16 — Raufarhofn, 

 25 — 40 fms, 3 sps., max. h. 19 — Reykiavik, 8 fms, stones, 

 10 sps., max. h. 12 — Siglafjord, 12 fms, 5 sps., max. h. 4,5 

 ■ — Öfjord, 2 sps., max. h. 4. 



Natica uaiia Möller. 



Fig. 26—27. 



Raufarhofn, 25 — 40 fms, 5 sps., max. h. 4,5. — New to 

 Te elan d. 



Lunatia groBiilaiHliea (Beck). 



Fig. 36—39. 



Arnanes, in fisli stomachs, 1 sp., h. 13 — Berufjord, 40 

 fms, clay, 3 sps., max. h. 9 — Raufarhofn, 25 fms, 2 sps., 

 h. 27 — Siglafjord, 12 fms, 1 sp., h. 4 — Thistilfjord, 10—16 

 fms, sand, clay, 5 sps., max. h. 15,5. 



In the sculpture of the shell, consisting of fine spiral 

 strise, these specimens differ from the normal type of the 

 species. As similar specimens also occur in other districts 

 and as there are all stages of transitions from sculptured to 

 smooth shells, they cannot be considered as a distinct Ice- 

 land variety. 



From these collections Jeffreys mentiones, besides L. 

 grosnlandica, the occurrence of L. Montagui off Iceland. Per- 

 haps he has determined the specimens of Berufjord to be 

 this species, with which their resemblance is striking. L. Mon- 

 tagui however is wholly smooth with no traces of spiral striae 

 and with a considerably Avider umbilicus and a callous co- 

 lumellar margin. Whether it occurs on the Iceland coasts is 

 consequently doubtful. 



Mr. BÅRDARSON has shown to me specimens of L. grcen- 

 landica with a greath resemblance to L. Montagui. Like the 

 exemples from Berufjord, which they surpassed in size, they 

 had but very feeble strise and a somewhat cailous columellar 

 margin. 



