. Morphological and systematic studies on the cheilostomatous Bryozoa . een. X internode of the stem of the samespecies. X 17. The distal end of a stem-internode. morehighly magnified. The internal supportingribs of the distal wall are seen and therosette-plates of the fan-shaped lateralbranch. X 40. The distal end of a stem-internode in an-other position. The hent distal wall withits rosette-plates and supporting-ribs is 40. A transverse section tliiough a stem-inter-node. The two lateral thickenings are 1. The distal wall of an internode of the stem,yiewed fro
. Morphological and systematic studies on the cheilostomatous Bryozoa . een. X internode of the stem of the samespecies. X 17. The distal end of a stem-internode. morehighly magnified. The internal supportingribs of the distal wall are seen and therosette-plates of the fan-shaped lateralbranch. X 40. The distal end of a stem-internode in an-other position. The hent distal wall withits rosette-plates and supporting-ribs is 40. A transverse section tliiough a stem-inter-node. The two lateral thickenings are 1. The distal wall of an internode of the stem,yiewed from above. X 2 m. .A longitudinal section through the upper-most end of a stem-internode. The distalwall with its rosette-plates and one of thelateral thickenings are seen. X 7.). 2n. Another longitudinal section through theupi)ermost end of a stem-internode. Thedistal walls supporting-ribs are seen andthe distal wall of the lateral branch. X 75. 3 a. Two stem-internodes of Bugiila glabra(Hincks). X 40. - • — 2 k. Ci. f/./i /.coiiisfii. /t/i/o. tia . fl / /irrjii/ri rS/iryiriri/•/? 2 /liiff. ^X/irf/J > ti//ii/>irti. f/.\yi Plate IV. 24* 372 Plate IV. i-if!. 1 ;i. Dinwrphozoon iiohilc (Hincks). The fourlowermost zcHucia have low cup-shapedoaHia. X 23. — 1 b. Zodcia of the same species, lateral view. As the lateral walls in the ligure are notsplit, only rosette-plates are seen. X 23. — 1 e. A transverse section tliroUf,li a colony show- ing its two layers with e.\trcmcly dllTcrentforms of zoiecia. In two zoieeia the verticalpart of the distal wall is seen with a multi-porous Three small vaultedrosette-plates are seen between the twolayers. X 40. — Id. The basal surface of some calcilied zocecia after the removal of the membranous zoce-cia. The rosette-plate of the lateral wall isseen and on one of the zocjecia two uni-porous rosette-plates. X 40. — 1 c. The distal end of an avicularium of the same species. X 75. — If. Zocecia of the
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Keywords: ., bo, bookcentury1900, bookdecade1900, bookidmorphologicalsys00levi
