. Il danese Ingolf-spedizione. Animali marini -- regioni artiche; spedizioni scientifiche; regioni artiche. 12 H0L0THURI01DEA Località: 64 IV . 27 20'W. "Ingolf" San 89, 581m, 8°.4C 1 spec. 19 23' N 9°35' O. "Thor" San 74, 9/6-06, 1200 m 1 ,11 L5' N. 9 35' W. "Thor" San 99, " 5-04, 900 m 4 18' W. -"Thor" San 166, !* 7-03, 957 m 4 Oltre a questi diversi esemplari da Bergen e Lofoten sono esaminati. I campioni prima di me sono tutti abbastanza grande, misura 10 - 15 cm di lunghezza, ma solo gli esemplari da Bergen sono satis- factorily conservati. Gli altri

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. The Danish Ingolf-expedition. Marine animals -- Arctic regions; Scientific expeditions; Arctic regions. 12 H0L0THURI01DEA Localities: 64 IV . 27 20'W. "Ingolf" St. 89, 581m, 8°.4C 1 spec. 19 23' N. 9°35' W. "Thor" St. 74, 9/6-06, 1200 m 1 , 11 L5' N. 9 35' W. "Thor" St. 99, " 5-04, 900 m 4 18' W. -'Thor" St. 166, !* 7-03, 957 m 4 Besides these, several specimens from Bergen and Lofoten are examined. The specimens before me are all fairly large, measuring 10- 15 cm in length, but only the specimens from Bergen are satis- factorily preserved. The others have the exterior layer of the body wall more or Diagnosis: Synallactide Holothurians with paired gonads and strongly reduced, even lacking, calcareous ring. Tentacles 18. Calcareous deposits resembling those of B. nutans but usually having the spires supplied with six or more columns instead of the four usual in the genus. Type specimen: The large specimen from "Ingolf" St. 73, in the Zoological Museum of Copenhagen. Description: The type specimen measures 10cm in length, 3 cm in width and 2 cm in height. The mouth is ventral and the anus is dorsal. It is pale greyish yellow, and has dorsally, besides two rows of large ambulacral papillae, some few smaller papillae irregularly scattered. Along the sides there are two rows of lateral. Textfig. 12. Socalled "large tables" from the posterior end of the dorsal side. X 300. / and 2, Bathyplotes natans. 3—5, Bathyplates heterostylides. less worn off. There are, however, in most of the specimens suf- ficient portions of skin left for a safe identification. As stated above the examination of these specimens has thrown light on the variation of the shape of the calcareous de- posits. It is true that the shape of the deposits is fairly constant from one specimen to another, but within the individual it varies quite perplexingly corresponding to the different parts of the body surface. As nobody has previously tak

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1890
• booksu
• booksubjectarcticregions