The Annals and magazine of natural history; zoology, botany, and geology . mesopores. In weathered specimensthe corallites may be very distinctly made out; theymeasure about 1^ millim. in their longer diameter by about1 millim. in their shorter. The autopores are irregularly ovalor subcircular in outline, and are in general completely iso-lated from each other by the mesopores, but occasionally twocome into contact either at their sides or at their folds are very small in this species, as may be seen inthe section, fig. B. The mesopores vary greatly both in sizeand in shape; in
The Annals and magazine of natural history; zoology, botany, and geology . mesopores. In weathered specimensthe corallites may be very distinctly made out; theymeasure about 1^ millim. in their longer diameter by about1 millim. in their shorter. The autopores are irregularly ovalor subcircular in outline, and are in general completely iso-lated from each other by the mesopores, but occasionally twocome into contact either at their sides or at their folds are very small in this species, as may be seen inthe section, fig. B. The mesopores vary greatly both in sizeand in shape; in some instances four of them encircle anautopore, in others six. Longitudinal sections show that the autopores are divided the Genus Fistulipora, M-Goy. 513 by a few remote tabulge, while the mesopores exhibit the cha-racteristic vesicular tabulation of the genus, especially nearthe base of the colony. As growth proceeds this tabulationassumes a more regular appearance, and may consist of twoor more rows of cells as it were dovetailed into each other(fig. 5, D). Fig. FistuUpora eifeliensis, Schliit. sp. A. Coralluin, natural size; the shadingis given merely to show the rotundity of the specimen and the some-what conical base. B. Transverse section, enlarged about twelvetimes. C. One of the autopores, showing the fold, enlarged abouttwenty times. D. Longitudinal section, enlarged about twelvetimes, a, autopores ; ??i, mesopores. Ohs. An interesting feature is noticeable in the mesoporesof this species. Certain of them, larger than the averageand of a subelliptical form, are partially divided by a pro-jection as thick as the cell-walls, which extends from thosewalls about halfway across the cell-cavity (woodcut, fig. 6). Ann. & Mag. N, Hist. Ser. 5, Vol. xvi. 35 514 Dr. H. A. Nicholson and Mr. A. H. Foord on very clearly a fissi- Fiff- 6.
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Keywords: ., bookcentury1800, bookdecade1880, bookpublisherlondo, bookyear1885
