I. Ascidiæ simplices. 



Nordhavsexpeditioneiis Ascidiæ simplices bestaar som 

 ovenfor nævnt, af 1 1 arter, hvoraf 6, som tidlioere er be- 

 skrevne og 5 nj'e. 



Arterne er føla:ende: 

 Fam. Ascidiidæ: Ciona gelatinosa, nov. sp.* 



Ascidiella patula, Muller. 

 Fam. Cynthndæ: Cynthia pjriformis, Eathke. 

 Styela rustica(?), Linné. 

 „ bathybia, nov. sp. 

 „ cylindriformis, nov. sp. 

 uniplicata, nov. sp. 

 Polycarpa libera, Kiær. 



„ poniaria, Savigny. 



,. comata, Alder. 



Fam. MolgiiJidæ: Paramolgula arctica, nov. sp. 



5 af disse arter, nemlig Ascidiella imfula, Cynthia 

 pyriformis, Styela rustira, Polycarpa libera og Polycarpa 

 poniaria, er omtalte af Kiær som horende til Norges fauna. 

 De er ogsaa paa Nordbavsexpeditionen fundne omkring 

 Norges kyst i større eller mindre afstand fra denne. Ase. 

 patula blev funden temmelig langt tilhavs i n. ø. for Vardø, 

 Cyn. pyriformis ved Røst, *SY. rastica syd for Vesteraalseg- 

 gen, Pol. libera ved Lofoten og Pol. pomaria ved Tromsø. 



Endini en art, nemlig Polycarpa comata, som ikke er 

 omtalt af Kiær, blev funden ved Tromsø sammen med Pol. 

 pomaria, og den maa saaledes ogsaa regnes blandt Xorges 

 ascidier. 



Af de øvrige arter, lilev Ciona gelatinosa funden i 

 Ishavet, n. for Yardo paa ca. oUO meters dyb, St. unipli- 

 cata ved Spitsbergens vestkyst paa 761 meters dyb, St. 

 cylindriformis ved Reykjavik, Paramolgula arctica ved Jan 

 Mayen og Styela bathybia langt tilhavs, s. v. for Spitsber- 

 gen paa et meget stort dyb, nendig 2195 meter. 



I. Ascidiæ Simplices. 



The Ascidiæ Simplices of the Norwegian Ncn-th At- 

 lantic Expedition comprise, as before stated, 1 1 species, 

 6 of which have been already described, and 5 are new 

 species. 



The sjiecies are as foUows: 

 Fam. Ascidiidæ: Ciona gelatinosa, nov. sp. 

 Ascidiella patula, Miiller. 

 Fam. Cyntliiidce: Cynthia pyriformis, Eathke. 

 Styela rustica(?), Linnæus. 

 ,, bathybia, nov. sp. 

 ,. cylindriformis, nov. sp. 

 ,. uniplicata, nov. sp. 

 Polycarpa libera, Kiær. 



,, pomaria, Savigny. 



,. comata. Alder. 



Fam. Molgididce: Paramolgula arctica, nov. sp. 



Five of these species, viz. Ascidiella pattda, Cynthia 

 pyriformis, Styela rnstica, Polycarpa libera and Polycarpa 

 pomaria, are mentioned by Kiær as belonging to the fauna 

 of Norway. In the Norwegian North Atlantic Exi)edition 

 they were also found round. and at varying distances from 

 the coasts of Norway. Ascidiella patula was found rather 

 far out to sea to the N. E. of Vardø, Cynthia 2>y'r'foi"mis 

 near Røst, Styela rustica to the south of Vesteraalseggen, 

 Polycarpa libera at Lofoten, and Polycaipa pwmaria at 

 Tromsø. 



One other species, which has not lieen mentioned by 

 Kiær, viz. Polycarpa comata, was found at Tromsø together 

 with P. pomaria. and should therefore be included among 

 the Norwegian Ascidians. 



Of the remaining species, Ciona gelatinosa was found 

 in the Arctic Ocean to the N. of Vardø, at a depth of 

 about 3U0 metres; Styela tmiplicata off the west coast of 

 Spitzbergen, at a depth of 761 metres; Styela cylindrifor- 

 mis at Reykjavik, Paramolgula arctica otF Jan Mayen, and 

 Styela bathybia far out to sea S. W. of Spitzbergen, at a 

 very great depth, naraely, 2195 metres. 



