Fra Stat. 366 (Magdalenebay) haves 2 Exemplarer, 
der er afvigende paa en høist eiendommelig Maade. Oper- 
culum er hos hydrophanum rundt, lidet og dets Gjennem- 
snit i Regelen mindre, men aldrig større end halve Mund- 
aabningens; Nucleus er central eller ubetydelig til Siden. 
Hos hine to er derimod Operculum paafaldende større end 
det normale, og for det ene Exemplars Vedkommende er 
det et ægte B. groenlandicum Operculum. Et af Exempla- 
rerne har en Kjøl rundt sidste Vinding noget nedenfor 
Periferien. 
Ægkapslerne (Fig. 23) ere enten enkelte eller nogle 
faa sammenvoxne. Overfladen er fint punkteret og ligner 
nærmest Appelsinens Ydre. 
Tænderne ligne B. groenlandicums. 
Buccinum nivale, un. sp. 
Tab. TIT, Fig. 24, 25 a, å. 
Testa ovata, tenws, nivea, anfractibus 5 (2) tumidis, 
ultimo magno et ventricoso, apertura magna, ovata, epider- 
mide laevi. Superficies ubique striis spiralibus densis tenui- 
bus striisque incrementi numerosis, irregularibus sculpta, oper- 
culo parvo, ovali, nucleo subterminal. 
Magn. long. 117”, lat. 9m, 
Station 164 — 457 Fayne. 
Der er kun fundet et ungt, men levende Exemplar af 
denne Form. Skallen adskiller sig ikke i noget væsentlig 
fra B. hydrophanum, naar undtages den snehvide Farve, 
og maaske er det kun en Varietet af denne. Men hoist 
eiendommelig er Operculum (Fig. 25 a, 5); det er ovalt, 
har Nucleus henimod nedre Ende, Undersiden (Fig. 25 3) 
har en bred, noget fortykket Rand og Veextlinierne er kun 
synlig igjennem Midtpartiet. 
Tænderne give som sædvanlig ingen Oplysninger; de 
ligne B. groenlandicums. 
Buccinum sulcatum, n. sp. 
Tab. III, Fig. 18. 
Testa tenuis, mitida, violacea, conica, anfractibus 6 
plans, aequaliter crescentibus, sutura minus conspicua, aper- 
tura ovata, utrinque acuminata, dimidiam fere testae longi- 
tudinem aequante, columella recta, plicis 2 leviter impressis. 
Superficies costis spiralibus crassis, in anfractu penultimo 4, 
una vel in superiore anfractus parte pluribus tenuioribus 
interpositis, striisque incrementi densis, sed obsoletis sculpta, 
epidermide laevi. 
From Stat. 366 there are 2 specimens differing re- 
markably from the typical form. The operculum in hydro- 
phanum is round and small, with a diameter as a rule less, 
never greater, than half the length of the opening of the 
mouth, the nucleus. being central, or nearly so. In the two 
aforesaid specimens, the operculum is, on the other hand, 
very considerably larger than that of the normal form, nay, 
in one of them, it cannot be distinguished from the oper- 
culum in B. groenlandicum. The other specimen is keeled 
round the last whorl, a little below the peripheral line. 
The egg-capsules (fig. 23) either simple or a few only 
grown together. Surface delicately punctured, causing it to 
resemble the rind of an orange. 
Dentition as in B. groenlandicum. 
Buccinum nivale, n. sp. 
PI. ILL, figs. 24, 25 a, 5. 
Testa ovata, tenuis nivea, anfractibus 5 (2) tumidis, 
ultimo magno et ventricoso, apertura magna, ovata, epider- 
mide laevi. Superficies ubique striis spiralibus densis temui- 
bus struisque incrementi numerosis, irreqularibus sculpta, oper- 
culo parvo ovali, nucleo subterminali. 
Magn. long. 11"™, lat. 97. 
Habitat: — Station 164, in 457 fathoms. 
\ Only one specimen, young but living, was obtained. 
The shell does not exhibit any material difference from that 
in B. hydrophanum, of which B. nivale is perhaps a mere 
variety. But the operculum (fig. 25 a, b) has very peculiar 
features; it is oval in form, with the nucleus near the lower 
extremity, the under surface (fig. 25 4) furnished with a 
broad, somewhat inspissated margin, and the lines of growth 
visible through the medial portion only. 
Nothing, as usual, to be learnt from the structure of 
the teeth, which is similar to that in B. groenlandicum. 
Buccinum sulcatum, n. sp. 
Pl. IIT, fig. 18. 
Testa tenuis, nitida, violacea, conica, anfractibus 6 
planis, aequaliter crescentibus, sutura minus conspicud, uper- 
tura ovata, utringue acuminata, dimdiam fere testae longi- 
tudinem aequante, columella recta, plicis 2 leviter impressis. 
Superficies costis spiralibus crassis, in anfractu penultimo 4, 
una vel in superiore anfractus parte pluribus tenwioribus 
interpositis, striisque incrementi densis, sed obsoletis sculpta, 
epidermide laevi. 
