. Bergens Museums skrifter. ProtistplaDktoii. 1 bi-aiiclios of tlu' (luito eonTs|H»ii(l ti rhuloiihoni). (hirsa Ihcii- CIV. full her iiKk-i (//(//. Fig. VII. The Cam] .strongly bent towards ea opines unite at tlio [ Ill ('iiiiijii/hifKiitliii. the primaiv verticil of braiidics is wanliiii;. of this, .seeoiulary branches (spines) are (leveloped on the 3 cdfres of the main sj)incs. It seems, therefore, most natural to derive Campylavaiiiha from the common yi'onnd form, as a parallel form to Phijjia- (â (iiitliii. It is, however, also possible that the verticil of branches is tr
. Bergens Museums skrifter. ProtistplaDktoii. 1 bi-aiiclios of tlu' (luito eonTs|H»ii(l ti rhuloiihoni). (hirsa Ihcii- CIV. full her iiKk-i (//(//. Fig. VII. The Cam] .strongly bent towards ea opines unite at tlio [ Ill ('iiiiijii/hifKiitliii. the primaiv verticil of braiidics is wanliiii;. of this, .seeoiulary branches (spines) are (leveloped on the 3 cdfres of the main sj)incs. It seems, therefore, most natural to derive Campylavaiiiha from the common yi'onnd form, as a parallel form to Phijjia- (â (iiitliii. It is, however, also possible that the verticil of branches is transformed into the scattered, strong spines on the edges, as this primary verticil appears to occur on the apical spine (?). The two basal sagittal spines. 1) and V, are in Cam- I (itlicr. Let us suppose that and we siiould have a sagit- 2)!/lac(iiitliii these two tal ring. It would be interesting if the ling forms (Steplwidea Hck.) as a whole could be derived in a similar way; but I am as yet un- able to judge if this be so, as my personal acquaintance with these forms is too deficient. In the material under examination, only one of these forms occurred, Dictyocircus chtthrafus, and even that was very sparsely represented. It seems, however, to me that this form most naturally may be derived in the manner mentioned. Such a derivation seems to be natural for the division Semantida Hck. I think, however, that the whole division Stephoidea Hck. requires a thorough revision. By help of the secondary lateral spines 1, (cfr. fii;-. VT and fig. VII) it seems that Dictyocircus dathratus may be quite natur- ally derived from Campylucantha cladophom. (Cfr. further under Dictyocircus). In this way too the long, protruding free spine, the apical one A. which is not seen in IIakckkl's rin;:- forms, is ex- plained. We also lind a clear and easy transition from Dictyocircus to Ceratospyris hypertiorea, additional meshes appearing on both sides â¢of the ring. The transition here is so ev
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Keywords: ., bookauthorbergensm, bookcentury1900, bookdecade1900, bookyear1905
