var. horealis, Phil. 
Fusus borealis, Phil. Abb. und Beschr. III 1850 Pg. 118, 
Fig. 5. 
Fusus formicatus, Reeve IV 1847 Pl. 16, Fig. 63. 
Tritonium antiquum var. communis, Midd. Beitr. Malaco 
Ros. Pg. 131, Fig. 3—6. 
Forekomst: St. 366—60 F., St. 373—30 F. 
Paa St. 366 (Magdalenabay, Spitsbergen) forekom 
saavel den glatte knudede, som alle Overgange baade til 
foregaaende Varietet og til den ved den norske Kyst al- 
mindelige carinerede Form. 
Middendorf har i ,Beitråze Mal. Ros.” og Dr. Leche 
i *Øfersigt öfer Novaja Semlja och Jenissej Hafsmollusker” 
tilfulde med Illustrationer paavist at Neptunea borealis Ph. 
gaar over 1 despecta Lin. 
Ægkapslerne er vel kjendte. 
Embryonet (Tab. I, Fig. 7 a, ») udtaget af Ægkapsler, 
funden paa St. 366 og sandsynligvis tilhørende Formen 
borealis ligner N. antiquas. I Kapslerne fandtes fra 3 til 
7 Embryoner, men som Regel var flere deforme, hvor det 
større Antal var tilstede. 
Tænderne (Tab. IV, Fig. 8—10) er vel kjendte fra Lovén, 
Troschel, Sars o. fl. De Variationer, som jeg har obser- 
veret, er gjengivet i Fig. 8, 9 og 10. 
Af 7 undersøgte Exemplarer fandtes hos; 
1 Explr. 3 Tænder paa Centralpladen 3 Tender paa Side- 
pladerne. 
2 0 RE å - — 3 paa den ene do. 
og 4 , » anden do. 
2 sd Ss i - — 4 Tænder paa do. 
2 ye ee 3 - = 4 — 3 alo. 
Hos Fig. 10 viser Centralpladen sig af en ualminde- 
lig Bredde. 
Apex uregelmessig. 
Subgen Sipho, (Klein) 
Apex uregelmæssig. 
Neptunea (Sipho) islandica, Chmn. 
Tab. 1, Fig. 9—12 og Tab. VI, Fig. 1—2. 
Fusus islandicus, Chmn. Conch. Cab. IV Pg. IV Pg. 141, 
Fig. 1312) 1318. 
Forekomst: St. 10, 25, 124, 192, 237, 261, 9286, 
312, 323 og 326 fra 90 til 658 Favne. 
Arten gaar saaledes ned til en Dybde af over 650 
Favne (St. 312) hvorfra 2 levende, men meget tyndskallede 
Exemplarer blev optaget. Dens Nordgrændse er Spits- 
bergen, i hvis Fauna den nu for første Gang indføres. 
10 
var. borealis, Phil. 
Fusus borealis, Phil., Abb. und Beschr. III, 1850, p. 118, 
fig. 5. 
Fusus fornicatus, Reeve IV, 1847, PI. 16, fig. 63. 
Tritonium antiquum var. communs, Midd. Beitr. Malaco 
Ros., p. 131, figs. 3—6. 
Habitat: — Stats. 366 (60 fathoms) and 373 (40 f.). 
At Station 3866 (Magdalena Bay, Spitzbergen) occurred 
not only the smooth, protuberant, but all the other transi- 
tion-forms, leading up alike to the foregoing and to the 
carinated variety common on the Norwegian coast. 
Middendorf, in his *Beitråge Mal. Ros.” and Dr. 
Leche, in his *Øfersigt øfer Novaja Semlja och Jenissej 
Hafsmollusker,” have shown that Neptunea borealis, Ph. is 
merged in despecta Lin. 
The egg-capsules are well known. 
The embryos (PI. I, fig. 7 a, ») taken from the capsu- 
les brought up at Station 366, and most likely belonging 
to the variety borealis, resemble those of N. antiqua. Each 
capsule contained from 3 to 7 embryos; but frequently 
some were deformed when the larger number were present. 
The teeth (Tab. IV, fig. s—10) are well known from 
Lovén's, Troschel’s, Sars's, and other zoologists’ drawings. 
The variations observed by myself are represented in figs. 
8, 9, and 10. 
Of 7 individuals examined — 
1 had 3 cusps on the central plate and 3 on both of the 
laterals. 
Or Bs ee ee : - -  Bonone of the lat., 
the other having 4. 
Ke = = - 4oneach of the lat. 
2 ag EE - - - 4- - -- - 
In fig. 10, the central plate exhibits unusual breadth. 
Apex irregular. 
Subgen. Sipho, (Klein). 
Apex irregular. 
Neptunea (Sipho) islandica, Chmn. 
Pl. I, figs. 9—12 and PI. VI, figs. 1—2. 
Fusus islandicus, Chmn., Conch. Cab. IV, p. 141, figs. 
1312, 1313. 
Habitat: — Stats. 10, 25, 124, 192, 237, 261, 286, 
312, 323, and 326; from 90 to 658 fathoms. 
This species occurs, accordingly, in upwards of 650 
fathoms (Stat. 312), 2 living, but exceedingly thin-shelled 
specimens having been brought up from that depth. Its 
northern limit of distribution is Spitzbergen, in whose fauna 
this species now appears for the first time. 
