76 



E/ssoa siriafa er lulbreclt fra Murmankysten og Spits- 

 bergen til Middelhavet, Madeira og Canariske oer. Des- 

 udeii forekommer den ved Grrønland. Nordamerikas østkyst 

 og Okotske hav. Inden den arktiske region og ved Nord- 

 amerika er det dog blot varieteten acnieata som optræder. 

 Den liathymetriske udbredelse er — 649 fv. Fossil or 

 den fuiulen i Skandinavien, nordlige Rusland, Britiske oer 

 os Italien. 



R. striata is distributed from the Murnian Coast and 

 Spitsbergen, to the Mediterranean, Madeira, and the Canary 

 Isles. It also occurs off Grcenland, the east coast of 

 N. America, and in the Sea of Okliotsk. Tn tlie arctic 

 regions and in N. America, however, it is only the viiricty 

 aadeafa that appears. Its bathymetrical distribution is 

 from U to 649 fathoms. It is a fossil in Scandinavia, 

 northern Russia. the Britisli Isles, and Italv. 



Rissoa, Onoba, castanea, Moller. 



Bissoa cagtanea. Moller, Ind. Moll. Gronl., 1842, p. 9. 



Cvngnla — G. 0. Sårs, Jloll. Reg. Aret. Norv., 1878, p. 174, Pl. 10, fig. 1. 



Findested. Norskøerne, 20 — 30 fv. og Advent Bay, 

 3(j_40 fv. 



Denne art er kjeiidt fra Groulaud, Laljrador, St. 

 Lawrencebugten, New Brunswick, Island, Spitsbergen, 

 Frants Josefs land, Murmankysten, Novaja Semlja, Okotske 

 hav. Hos os er den kun funden ved Vadsø. Den bathy- 

 metriske udbredelse er 5—120 fv. Saavidt vi kan dømme 

 af det materiale, som har staaet os til tjeneste, kan neppe 

 rissoa arcnarin, Mighels, holdes ud fra denne art. Lige- 

 ledes er pahuUnelJa dnc)ulaia, Middendorf, synonym. 



Locality. The Norwegian Islands (20 — 30 fathoms) 

 and Advent Bay (.30 — 40 fathoms). 



This species is known from Greenlaiul, Labrador, 

 the Gulf of St. Lawrence, New Brunswick, Icelaud, Spits- 

 bergen, Franz Josef Land, the Murman Coast, Novaja 

 Semlja, and the Sea of Okhotsk. In Norway it is only 

 found at Vadsø. Its bathymetrical distribution is from h 

 to 120 fathoms. As far as we can judge from the mate- 

 rial at our disposal, E. arenaria, Mighels, can scarcely be 

 kept sepaiate from this species ; and PaludinelJa cingidata, 

 Middendorf, is also svnonvmous with it. 



Rissoa, Cingula, turgida, Jeffreys 



Rissoa fnrcjida, Jeffreys, Ann. Mag. Nat. Hist., ser. 4, vol. o, 1S7U, p. 44.T. 



_ _ G. 0. Sårs, Moll. Reg. Aret. Norv., 1878, p. 183, Pl. 10, fig. 12. 

 — seniipelhicida, Friele, Jahrb. Deutsch. Mal. Gesellsch., vol. 6, 1879, p. 274. 



Findested. Stationerne 192, 267, 353 og Husø. 100 

 f<-. Dybde 100— 1;-133 fv. Exemplarerne fra station 192 

 jg 353 er fuldstændig glat (var. lænor). 



Denne ;egte dylnandsform er udbredt langs den norske 

 kyst fra Christiauiafjorden til Nordkap. Forovrigt er den 

 udbredt laugs Vesteuropa indtil Gibraltar samt ved New 

 England. Den bathymetriske udbredelse er 40 — 1333 fv. 

 Fossil er den funden paa Sicilien og Calabrien. 



Locality. Stations 192, 267, and 353, and Huso 

 (10() fathoms). Dei^tii 100— 1333 fathoms. The specimens 

 from Stations 192 & 353 are quite smooth (var. lærior). 



This true deep-water form is distributed along tiie 

 Norwegian coast from the Christiania Fjord to the North 

 Cape, and also along the coast of Western Europe down 

 to Gibraltar, and in New England. Its bathymetrical dis- 

 tribution is from 40 to 1333 fathoms. It is a fossil in 

 Sicily and Galabria. 



Rissoa, Cingula, islandica, Friele. 

 Rtssoa islandica. Friele, Nordhavs Exp. Moll, vol. 2. 1886, p. 28, Pl. 11, fig. 8 & 9. 

 Findested. Station 48, 299 fv. Il Locality. Station 48 (299 fathoms). 



