. Il danese Ingolf-spedizione. Animali marini -- regioni artiche; spedizioni scientifiche; regioni artiche. 14 BRACHIOPODA irgin. - "Michael Sars" San 85; 62°53'N. 9°06' O.;390Ra; I spec. "Ingolf" San 81; 61 44' N 27 0O'W.;913m; 2 spec, fissato ad un tectibranch gasteropode e coperto con mIi. i "Michael Sars" San79a;6R08' N.9°46'W.;850m; 1 spei - "Michael Sars" Suor 76: 59°29' N 7°51' O.; 1290 m; 55 spec- Michael Sars" San 76 b;59°23'N. 7 10'W.; 1290 m; 25 spec. Molti degli esemplari, in particolare quelli provenienti da due ultimi, località limitrofe,

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. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 14 BRACHIOPODA irgin. - "Michael Sars" St. 85; 62°53'N. 9°06' W.;390ra; I spec. "Ingolf" St. 81; 61 44'N. 27 0O'W.;913m; 2 spec, fastened to a tectibranch gastropod and covered with mIi. i "Michael Sars" St.79a;6r08'N.9°46'W.;850m; 1 spei - "Michael Sars" Sr. 76: 59°29' N. 7°51' W.; 1290 m; 55 spec- Michael Sars" St. 76 b;59°23'N. 7 10'W.; 1290 m; 25 spec. Many of the specimens, notably those from the two last mentioned, neighbouring localities, are very large, some few about 15 mm long and 30 mm broad, in all probability close to the maximum of the species. Most of them are dead shells, filled with fine grey clay and covered with Bryozoans, several of them also with barnacles. In all the large specimens the loop is typical dalliniform i. e. attached to the crura only, because during growth a resorption of the interconnecting band of the septum and the branches of the loop takes place. The median septum remains well developed throughout life whereas the dental plates gradually vanish, both features being in contradistinction to the corre- sponding features in Waldheitniathyris cranium. The present finds are all restricted to a small area between Iceland, Scotland and Norway, situated inside the previously known area of distribution, thus offering nothing of interest. (Only "Ingolf" St. 81 is noteworthy). The further distribution of the species in the northern Atlantic is only small, as the species is confined to the Gulf Stream area, the northernmost limit lying at Lofoten. The southernmost localities are from off the Atlantic coast of Soudan, the Canary Islands a. o. from where the average size of the specimens is considerablv smaller. Family Rhynchonellidae. The Dimerilid Group. Cryptopora gnomon (Jeffreys) North Atlantic records: 1876b Atretia gnomon Jeffreys, p. 251. 1878 Atretia gnomon Jeffreys, p

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1890
• booksu
• booksubjectarcticregions