the Trondhjem Fiord. 359 
narrower in form than the next. c: these specimens are abso- 
lutely identical with those of d, and are the form figured by 
Jeffreys, 1884, fig. 3, except that the spiral riblets are on all 
parts of the whorls; ¢ and d have not the labial rib so well 
developed, as is admirably figured by Sars (fig. 5c), with 
whose figures e, f, and g exactly correspond. fare some of the 
original specimens of the form dredged by Forbes and Mac- 
Andrew and figured in the ‘ British Mollusca;’ they differ 
from Norwegian and Mediterranean specimens, as Forbes and 
Hanley’s figure shows, in the more conical outline, much 
less swollen and almost flat volutions, and less expanded 
mouth. The Norwegian form [ therefore consider should be 
called Alvania subsoluta, Ar., and the Loch-Fyne form 
Alvania subsoluta, Ar., var. abyssicola, Forbes. 
The Kattegat examples are interesting, intermediate be- 
tween the British and Norwegian forms, though perhaps 
nearer to the former. 
The particular specimen of A. subsoluta figured by Jeffreys 
(1884, fig. 3) is represented as having spiral riblets only on 
the lower half of the whorls. One of my Trondhjem-Fiord 
examples has no spiral riblets except on the last whorl, and 
another has the upper whorls without riblets, while on the 
penultimate whorl they are, as in Jeffreys’s figure, confined 
to the lower half. 
53. Onoba striata, Adams. 
A few specimens of the typical form. 
54. Velutina levigata, Penn. 
Trondhjem and Rédberg. 
55. Lamellaria latens, Miiller. 
Rédberg, 40-70 fath., one specimen. 
56. Lunatia grenlandica, Beck. 
Two or three small specimens, 150 fath., Rédberg. 
a4 
57. Lunatia Montagui, Forbes. 
Shallow water, Trondhjem and Rédberg. 
58. Scalaria grenlandica, Perry. 
Only one specimen, Rédberg, about 20 fath. 
59. Aclis exigua, G. O. Sars. 
One living specimen, 250-300 fath., Rédberg. 
60. EHulima intermedia, Cantr. 
Rédberg and Trondhjem, down to 300 fath. 
rat ae 
