10 



Operculum Fig. 23 a. 



Tcenderne (Tab. X. Fig. 6, 6 a) afviger ikke fra fore- 

 gaaende Arts. 



Forekomst: St. 262, 273. 337, 359, 3G3 fra 146 til 

 416 Favne. 



Uagtet denne Fonn staar meget nær B. cancellata, 

 saa vil den dog i alle Aldersstadier kunne lade sig udskille. 



Bela Schmidti, nob. 



Tab. VIII. Fig. 6. 



Mangelia? plicifera, Schmidt (non S. Wood), Mem. l'acad. 



de sciences (Result, d. Mamuthexped.) St. Petersb. 1872, 



Pag. 57. Tab. IV, Fig. 4. 5. 

 Pleurotoma plicifera, Leche, Overs. Vet. Akadm. Handl. 



(,, Novaja Semblja og Jenisey Hafs mollusker") Pag. 58. 



Kun et voxent Exemplar med en no-get mutileret 

 Læbe blev fundet i Magdalenebay (Spitzbergen) 30 Favne 

 og et ganske lidet i Adventbay 20 Favne. 



Schmidts Tegning af Mangelia plicifera ligner saa 

 lidet Woods Clavatula plicifera*, at jeg neppe kan tro, at 

 dette er den engelske Cragform. Jeg vover derfor at 

 foreslaa Navnet Schmidti for den recente arktiske Art. 

 Den har nogen Lighed i Form med li. cancellata; men 

 Sculpturen er væsentlig forskjellig. 



Axialribberne er sigmadannede og meget stærkt frem- 

 trædende; Spiralsculpturen tæt og meget tin. kun paa 

 Hovedvindingens nederste Del er mere skarpt indskaarne 

 Linier. Vindingerne er afrundede. Farven er rødlig. 



Det unge Exemplar fra Adventbay, som med sine 

 udprægede stærke Axialribber henviser den til denne Art, 

 har kjølede Vindinger. 



Dr. Schmidts Tegninger stemmer godt overens med 

 mit Exemplar og Prof. Leche har havt den Velvillie at 

 sende mig hans Pl. plicifera fra det Kariske Hav og jeg 

 har saaledes overbevist mig om, at min Bestemmelse er 

 overensstemmende med Leches. Hr. Arth. Krause har 

 meddelt mig at han har Arten fra Beringshavet.- 



1 Wood „MoU. from the Crag-' Vol. 1, Pag. 64, Pl. VII. Fig. 15. 



- I Krauses „Beitrag zur Kentnisz Moll. Fauna Berino-smeeres-' 

 Tab. XVIII, Fig. 1 er en fuldstsendigere Tegning af Hela Schmidti end 

 min og i lians Fig. T er Tandformen fremstillet. Hr. Kranse gjør 

 opmærksom paa, atTænderue er paafaldende store, nemlig] mm. lang. 

 Han njor likeledes npnia-rksora paa at Bela turpa, Dall sandsynligvis 

 er denne Art og jes skal indrømme, at Dalls Beskrivelse (Pro. U. S. 

 Nat. Museum 1 885, Pag. 523,) passer vel, men uden Tegning kan man 

 vanskeligt med Sikkerhed identificere Arten. 



Open ulum, fig. 23 a. 



The teeth (Pl. X. fig. 6, 6 a) do not differ from those 

 of the preceding species. 



Habitat: Stats. Nos. 262, 273, 337, 359, 363 in 

 from 146 to 416 fathoms. 



Although this form stands closely related to B. can- 

 cellata, it is. however, distinguishable in all stases of its 

 growth. 



Bela Schmidti, nob. 

 Pl. VIII, fig. (i. 



Mangelia? plicifera, Schmidt (non S. Wood), Mem. l'acad. 



de sciences. (Result, d. Mamuthexped.) St. Petersb. 



1872, pag. 57, PI. IV, figs. 4. 5. 

 Pleurotoma plicif ra, Leche, Overs. Vet. Akad. Handl. 



(Novaja Semblja and Jenesey Hafsmollusker) pag, 58. 



Only one adult specimen with a somewhat mutilated 

 lip was found at Magdalene Bay (Spitzbergen) in 30 fa- 

 thoms; and quite a small one, at Advent Bay. in 20 fathoms. 



Schmidt's illustration of Mangelia plicifera so little 

 resembles Woods Clavatula plicifera l , that I can scarcely 

 believe it to be the English crag-form. I venture there- 

 fore to propose the appellation Schmidti for this recent 

 arctic species. Its form lias some resemblance to that of 

 B. cancellata, but the sculpture is materially different. 



The axial ribs are sigmoidal. and very strongly pro- 

 minent. The spiral structure very fine and close, and it 

 is only in the lower part of the Body whorl that the 

 striatums appear more strongly imprinted. The whorls are 

 rounded. The colour is reddish. 



The young specimen from Advent Bay; which from 

 its distinct strong axial ribs plainly refers itself to this 

 species; has angulated whorls. 



Dr. Schmidt's illustrations coincide, well, with my 

 specimen, and Prof. Leche has had the kindness to send 

 me his B. plicifera from the Kara Sea; I have, thus, 

 convinced myself that my determination is in accord with 

 Leches. Dr. Arth. Krause has informed me that lie has 

 the species from Behrings Sea. - 



' Wood „Moll. from the Crag" Vol. 1. pag. 64. PI. VII. fig. 15. 



- In Krauses „Beitrag zurKentniss Moll. Fauna Beringsmeeres" 

 Pl. XVIII, tig. 1 there is a more complete illustration oi Bela Schmidti 

 than mine: and in his fig. 7 tin- dental form is given. Dr. Krause calls 

 attention to the fact that the teeth are remarkably large, namely 1 mm. 

 in length. He further remarks that /■'</« tihrpa, Dall, is probably this 

 species, and I must admit that Dalls description (Pro. U. 8. Nat. 

 Mus. 1885, pag. 523) accords well, but without an illustration it is 

 difficult tu identify the species with certainty. 



