Denne for Norges Kystfauna nye Art adskiller sig 
fra Velutina lævigata, Penn. ved sin mørkere Farve, der i 
Skallens Indre ofte spiller over i det violette og ved den 
væsentlig afvigende Sculptur. Den synes at være temmelig 
sjelden. 
Rissoa Verrilli, n. sp. 
Ma bio ba 
Skallen lang oval, hvid, solid, Vindingerne 5, convexe, 
Apex stump, glat, Suturen dyb, Mundaabningen rund oval; 
Sculpturen bestaar af omtrent 20 stærkt fremtrædende 
axiale Ribber og en microscopisk fin og tæt Spiralstriering. 
Der er ingen Navle, men kun en fin Navlesplit; den ydre 
Læbe er fortykket. 
Størrelse: 37” Axiall. 1777" Diam. 
Forekomst: St. 192—649 Fayne. 
Den eiendommelige fine Spiralsculptur, der i Fig. 5a 
er gjengivet, gjør denne Art let gjenkjendelie. 
Den forekom kun paa en eneste Station, men var 
her temmelig talrig, dog alle døde Exemplarer. 
Rissoa (Alvania) Jan Mayeni, Fr. 
Tab. XI, Fig. 6, 7. 
fiussoa Jan Mayeni, Friele, Nyt. Mag. 1878, Pag. 224, 
Pl. 1, Fig. 4 a, b. 
R. sibirica, Leche, Sv! Vet. Akad. Handl. Bd. 16! (,. Hafs- 
mollusker*) Pag. 38, Tab. 1, Fig. 10. 
Skallen oval conisk, solid, brun, Vindingerne 5 tumide, 
vinklede rundt de to sidste eller kun sidste Vinding, Sutu- 
ren dyb og ofte furelignende; Mundaabningen rund oval, 
noget udvidet nedad og noget vinklet hvor den ydre Læbe 
støder sammen med Columellen; Columellen lidet bøiet, 
der er ingen Navle, men kun en mere eller mindre dyb 
Navlesplit. Sculpturen bestaar af 5 til 8 stærkt fremtræ- 
dende axiale Ribber, hvilke rundt de sidste Vindingers 
Periferi er knudformige, samt 8 til 10 Spiralfurer. De 
axiale Ribber gaå sjelden længere end halvt ned paa Ho- 
vedvindingen og imellem forsvinde de fuldstændig ud mod 
Mundaabningen. 
Qmm Diam, 
2255 26. 
Størrelse: 5"” Axiall, 
Forekomst: 223, 224, 
307 fra 70 til 197 Favne. 
270, 273, 326, 336, 
på 
RO 
«I 
This species — a new one in the fauna of Norway — 
is distinguishable from Velutina levigata, Penn. by its 
darker colour which, in the interior of the shell, frequently 
merges into yiolet, and by its materially divergent sculp- 
ture. It appears to occur rather rarely. 
Rissoa Verrilli, n. sp. 
Pl. XI, fig. 5, a. 
The shell ovo-elongate, white, solid; 5 convex whorls; 
apex obtuse, smooth: the suture deep; the aperture sub- 
The sculpture consists of, about, 20 strongly 
prominent axial ribs, and a microscopically minute and close 
spiral striation. There is no umbilicus but only a minute 
umbilical split. The outer lip is thickened. 
circular. 
Sie: Axial length. 38", Diam. 11/9””. 
Habitat: Stat. No. 192. Depth, 649 fathoms. 
The peculiar fine spiral sculpture, which is illustrated 
in fig. 5, a@, causes this species to be readily distinguishable. 
It occurred at only one station, but it was, there, 
pretty abundant; all the specimens were, however, dead. 
Rissoa (Alvania) Jan Mayeni, Fr. 
PIL Gh, kas, ole 
Rissoa Jan Mayeni, Friele, Nyt. Mag. 1878, pag. 224, Pl. I, 
fig. 4 a, b. i 
LB. sibirica, Leche, Sv. Vet. Akad. Handl. Bd. 16 (,,Hafs- 
mollusker*) pag. 38, PI. I, fig. 10. 
The shell oval-coniform, solid, brown; 5 tumid whorls, 
angulated round the penultimate and ultimate, or ultimate 
whorl only; the suture deep and frequently grooye-like. 
The aperture subeireular, somewhat dilated below, and some- 
what angulated at the point where the outer lip unites 
with the column; the column inconsiderably curved. No 
umbilieus but, only, a more or less deep umbilical fissure. 
The sculpture consists of 5 to 8 strongly prominent axial 
ribs which are, round the periphery of the ultimate whorls, 
nodiform, and also of 8 to 10 spiral grooves.. The axial 
ribs seldom proceed further than half down the Body 
whorl, and sometimes completely disappear towards the 
aperture. 
Size: Axial length, 5%”, Diam. 2”. 
Habitat: Stats. Nos. 228, 224, 225, 267, 270, 273, 
326, 336, 357. Depth, 70 to 197 fathoms. 
