. Morphological and systematic studies on the cheilostomatous Bryozoa . of a zooecium. X 55. — 5d. A sagittal section through the same species. occcium is seen , and the twozoiecia show a vestibular arch at the be-ginning of the peristomial tube. X Mae (iilliv. Three ooe-cia are seen. X ()5. A sagittal section through an otccium ofthe same species. X operculum of the same s|)ecies. X 55. — 7 a. A sagittal section Ihrougli LeUijtbopora stel- lata Pusk. Two ooecia are seen. X 17. — iS a Eulhijroides Jellijac n. sp. X 40. — X1). The distal end of a young z
. Morphological and systematic studies on the cheilostomatous Bryozoa . of a zooecium. X 55. — 5d. A sagittal section through the same species. occcium is seen , and the twozoiecia show a vestibular arch at the be-ginning of the peristomial tube. X Mae (iilliv. Three ooe-cia are seen. X ()5. A sagittal section through an otccium ofthe same species. X operculum of the same s|)ecies. X 55. — 7 a. A sagittal section Ihrougli LeUijtbopora stel- lata Pusk. Two ooecia are seen. X 17. — iS a Eulhijroides Jellijac n. sp. X 40. — X1). The distal end of a young zooecium of the same species. The frontal surface is caleiliedright up to the operculum. X 75 — cS c. The distal end of an older zocccium in which a resorption of the chalk has taken to the operculum. The two hol-low s))ines are formed, which cover theentrance to the comi)cnsation-sac. X 75. — 8d. An o])erculum of the same species. X 100. — 8 e. An avicularian mandible of the same spe- cies. X 40. / ,//j//isiii, /^n/o\o(i /VJT/.. r ,rjic//iuce//aria f /iilmc apjtrUioifles / fuhiic nixit^ Mac Gill. &? Ju/slrij- Mar Cn// 7. /.fir. slr/la/<i ^iislr S. ^i/l/i- efiisriyialis Miislr Plate XVI1. 26* 404 Plate XVII. Vtfi. 1 :). Eschitrella <li(iphaiia (Mac Gilliv.). A youngcolony with tlie primary zoaciuni. Pore-ilianibcrs are seen on tlirec zotpcia. X 40. — 1 I) Two zodcia of tlic same species. Pores are seen inside the marginal ridge. X 40. — 1 c. Tlie same species. Tlie distal liall of a zoie- eiuin, the frontal wall of whieh has beenremoved, so that the highly developed vesti-bular arch may be seen and the rods bywhich it is connected with the lateral 55. — 1 d. The distal half of a zoiecluni of the same species, seen from the basal snrface afterremoval of the basal wall. The basal wallof the vestibnlar arch is seen. X 55. — 2 a. Escharclla iilnissico
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Keywords: ., bo, bookcentury1900, bookdecade1900, bookidmorphologicalsys00levi
