Var clathratus, nob. 
Tab. VII Fig. 2. 
Rundt Vindingernes Midte gaar en fremtrædende List 
hvorved en stormasket gitret Seulptur fremkommer. 
Forekomst: Station 270—136 Favne. 
Operculum (Fig 20) er typisk lang oval. 
Var spitzbergensis, nob. 
Tab. VII Fig. 3, 3a, 4 og Tab. IX Fic. 6, 
6a. 
Formen og Forholdet imellem Spir og Mundaabning 
er typisk. I Skulpturen afviger nærværende Varietet ved 
en stærkere fremtrædende Kjøl, der kan gaa over til en 
skarp fremstaaende Kant (Fig. 4) og en noget kraftigere 
Spiralstriering. 
Operculum Fig. 3a synes at være noget bredere end 
det typiske. 
Størrelse. Axiallengde 197” Diameter 107”, 
Tænderne (Pl. IX Fig. 6, 6a) har en eiendommelig 
Indskjæring paa den ene Side; Formen forøvrigt er den 
brede typiske. Af 6 undersøgte Exempl. viste alle utor- 
andret den samme Struktur. 
Forekomst: Magdalenebay (Spitzbergen) 40 til '50 
Favne. ' 
Dr. A. Krause, som forleden Sommer besøgte mig, 
har fundet denne Form i Beringshavet og hans Tegninger 
af Tænderne stemme aldeles overens med mines Han var 
tilbøielig at holde den for en god Art væsentlig paa Grund 
af dens udprægede Tandstructur. ! 
Var bergensis, nob. 
Tab. VII Fig. 5 a be, G, Tab. IX Fie. 7 8. 
Spiret noget længere axiale 
Ribber talrigere end hos den typiske. 
Apex (Fig. 5 a b) afrundet, første Vinding har 3—4 
Spiralribber. 
Operculum (Fig. 5 c) er ikke væsentlig afvigende fra 
det typiske. 
Tenderne (Tab. IX Fig. 7. 8) har jeg hyppigst fun- 
det som dfbildet i Fig. 8 med det dybe Indsnit 1 Siden, 
men den derfra væsentlig afvigende Form i Fig. 7 er imel- 
lem forekommen. 
Forekomst: Under Expeditionen fandtes den ved 
Sognetjordens Munding.  Forøvrigt har jeg oftere fundet 
den ved Bergen paa omkring 100 Favne, og Dr. Daniels- 
sen har den fra Molde. Nordenfor dette Sted har jeg ikke 
observeret den. Min. afdøde Ven Dr. Jeffreys holdt den 
for en god Art. 
end Mundaabningen; 
1 Efterat nærværende Arbeide var færdig skrevet, har Dr. 
Arth. Krause været saa venlig at sende mig et Separataftryk af: 
Hin Beitrag zur Kenntnisz d. Moll. Fauna Beringsmeeres*, og jeg ser 
deraf, at han har bibeholdt det af mig givne Navn for Formen. 
Var. clathratus, nob. 
PI. VII fig. 2. 
Round the middle of the whorls, a projecting fillet 
occurs, producing a coarsely cancellated sculpture. 
Habitat: Station No. 270. Depth 136 Fathoms. 
The operculum (Fig. 2b) is typically. elongato-ovate, 
Var. spitzbergensis, nob. 
Pl., VII figs. 3, 3a, 4 and Pl. IX fies. 6, Ga. 
7 
Shell, and the relations between the spire and the 
aperture, are typical. This variety differs, in its sculpture, 
in having a more projectant angle, which may occasionally 
pass into a sharp protuberant edge (fig. 4), and in a some- 
what more marked spiral striation. 
The operculum (fig. 36) appears to be somewhat broader 
than the typical one. 
Size. The axial length 19””"; the diameter 107". 
The teeth (Pl IX fig. 6, 6a) have a peculiar recess- 
ment upon the one side; the form,, otherwise, is the broad 
typical one. Out of 6 specimens examined, all showed the 
same uniform structure. 
Habitat: Magdalene Bay (Spitzbergen). 
50 fathoms. 
Dr. A. Krause, who visited me last summer, has 
found this form in Behring’s sea; and his illustrations of 
the teeth accord completely with mine. -He was inclined 
to regard it as a separate species, principally, on account 
of its distinct dental structure. ! 
Depth, 40— 
Var. bergensis, nob. 
Pl. VIE fig. 5 a » c, 6, Pl IX fig. 7, 8. 
The spire is somewhat longer than the aperture, and 
axial ribs are more numerous than in the typical form. 
Apex (fig. 5 a b) obtusely rounded. The first whorl 
has 3—4 spiral ribs. 
The operculum (fig. 5 c) is not materially different 
the 
from the typical one. 4 
The teeth (Pl. IX fie. 7, 8), which I have most fre- 
quently found, are like those illustrated in fig. 8, with the 
deep recessment in the side, but the structure differing 
materially from it, shown in fig. 7, occasionally appears. 
Habitat: It was found by the Expedition at the 
mouth of the Sognefjord. I have, otherwise, frequently 
found it near Bergen, in about 100 fathoms, and Dr. Dan- ° 
ielssen has found it at Molde. To the North of that 
place I have not observed it. My lamented friend Dr. 
Jettreys regarded it as a distinet species. 
1 Since the present work was written, Dr. Arth. Krause, has 
been so-kind as to send me a copy of ,,Hin Beitrag xm Kenntnisz d. 
Moll. Fauna Beringmeeres*, and I see, from it, that he has retained 
the appelation which I have given to the form. 
