J. Turtoni ved sin forholdsvis bredere og mere regelmæs- 

 sige Form og den betydelig skarpere, mere udprægede Sculp- 

 tur, som i end bøiere Grad kommer frem bos den Unge. 



Tænderne (Tab. IV, Pig. 1—3) ligner foregaaende Arts, 

 men Sidepladerne bar en slankere Form og Tænderne paa 

 den indvendige Side er mindre udviklet. 



Rækkernes Antal bos det voksne Exemplar var om- 

 trent 150. 



Arten er udbredt lige op til 80de Breddegrad, og 

 dens Sydgrændse blev fnnden ved omtrent 66°. 



Volutopsis norvegicus, Cbemn. 



Strombus norvagicus, Cbemn. Concb. (Jab. Mart, og Chemn. 



Pg. 218 Fig. 1497—98. 

 Volutopsis norvegicus, Mørch. 

 Stombella, gen. (i rav (non Schlut). 



Forekomst: St. 323—223 Favne og St. 333-146 F. 



De arctiske Exemplarer synes at være mindre end 

 Nordsøens. men forøvrigt er der intet afvigende i Form. 



Paa St. 323 forekom en Ægkapsel. og denne inde- 

 boldt kun et Embryo. 



Mr. Howse angiver i "Notes on a dredging Excursion 

 oft' the coast of Durham" (1. c. Pg. 162). at V. norvegicus 

 Kapsler indeliolder 2 og 3 Embryoner, og dette bekræfter 

 senere Dr. Jeffreys i "Br. Concb.'" Der synes saaledes at 

 være meget ubestemte Gramdser for Arternes Frugtbarbed, 

 men man tør vel neppe af dette ene Tilfælde udlede, at 

 Arten i det kolde Isbav viser sig mindre frugtbar end i 

 det varmere Nordsø Vand. 



Pyrolofusus deformis, Reeve. 



Tab. I. Fig. 8 og Tab. IV, Fig. 11—13. 



Fitms deformis, Reeve. Concb icon. 1847 Vol. IV Pl. 12, 

 Fig. 45 a, }>. 



Fusus (Pyrolofusus) deformis, Mørch, Cat. d. Mol. du Spits- 

 berg Pg. 16. 

 Forekomst: St. 366 — 61 F.. 2 levende Exemplarer. 



Det største maaler 100""" lan.- og 66""" bred; Mund- 

 aabningen 72*"'" lang og 38 m "' bred. 



from that of J. Turtoni, by reason of its greater breadth 

 and regularity of form, and sharper sculpture. 



The Dentition (Pi. IV, figs. 1— :i is similar in structure 

 to those of the foregoing species; but the laterals have 

 comparatively a slender appearance, and the cusps on the 

 inner side are less developed. 



The number of rows in the full-grown specimen were 

 about 150. 



This species occurs as far north at the 80th parallel 

 of latitude, and its southern limit of distribution reaches 

 down to W. 



Volutopsis norvegicus, Chemn. 



Btrombus norvegicus, ( 'hemn.. Conch. Cab. Mart, and Chemn., 



p. 218, tigs. 1497—98. 

 Volutopsis norvegicus, Morch. 

 SbrombeUa, gen. Gray (non Schlut). 



Eabitat: -- Stations 323 (223 fathoms); 333 (147 f.) 



The Arctic specimens would appear to be somewhat 

 smaller than those from the North Sea; there is, however, 

 no dissimilarity in form. 



An egg-capsule, containing only one embryo, was brought 

 up at Station 323. 



Mr. Howse states in his "Notes on a dredging Ex- 

 cursion oft' the coast of Durham." (1. c. p. 162), that the 

 capsule of V. norvegicus contains from 2 to 3 embryos, in 

 which he is confirmed by Dr. Jeffreys in -'Brit. Conch." 

 The limits . of fecundity in this species seem accordingly 

 to be very indefinite; we are, however, hardly warranted 

 to infer from a solitary instance, that the species is less 

 fecund in the Arctic Ocean than in the warmer waters of 

 the North Sen. 



Pyrolofusus deformis. Reeve. 



PI. I. tig. 8 and PI. IV. figs. 11 — 13. 



Fusus deformis, Reeve. Conch, icon. 1847, Vol. IV. PI. 12, 

 fig. 45 a. b. 



Fusus (Pyrolofusus) deformis, Morch. Cal. d. Mol. du. Spits- 

 berg, p. 16. 

 Habitat: — Station 366 in 61 fathoms; 2 living 



specimens. 



The larger of the two individuals measured 100""" 



in length and 66 mm in breadth; the aperture was 72""" 



long and 38'""' wide. 



