NOKTII AMKKH'AN ICAIILY TERTIARY BRYOZOA. 



175 



three pairs of Literal and one terminal: the latter is sometime* divided into two or 

 even three small chambers. 



<!< m>ti/i>c. <'<nt/ni-itni]>htix (Fhixfru) xfiinifii' Johnston. Iveecnt. 



This is the Meml/nnii/iorn echinus group of Waters, which he defines as fol- 

 lows: " Ovicells unknown: avicularia pediculate or articulate." However, the geno- 

 type itself is classed in the M, /n?>/'</u//>on' J/n>,/fa group with " ovicell with rib." 



Genus AMMATOPHORA Norman, 1903. 



Zooecia sub<>vate: a calcareous 



1003. Ainina1oi>lir>r<i NORMAN, Natural History of East Fir.mark. Annals nnd Maii.-mne 

 Natural History, ser. 7, vol. 12, ]>. ss. 



Zooecia and ovicell depressed and flattened, 

 crest occupying about two- 

 thirds of the area. Oral 

 opening distal end of the 

 membranous portion. Walls 

 thin, terminating at the ovi- 

 cell in a knob. Ovicell en- 

 tirely separable from the zoo- 

 ecium. resting on the knob-; 

 just mentioned; of unusual 

 and varied form. Surface of 

 zoarium with raised nodulous 

 processes. No avicularia. Xo 

 clietellae. (Norman.) 



<;<_iio/ype. Ammatophora 

 ( Mi ml/rani pora) nodulosa 

 Hincks, 1880. Recent. 



The opercular valve never closes the ovicell. 



FIG. 43. Genus Ammutojiliorn Norman, 1903. 

 A-C. Ammatophora nodulosa Hincks, 1S80. A. A zooecium 

 exhibiting an unusual form of the ovicell. B. The younger 

 condition of the more usual form. C. The mature condition 

 of the same. (A-C after Norman, 1!M>.;. 



Genus MARSSONOPORA Lang, 1914. 



1914. llarssonopora LANG, Cretaceous Cheilostoine Polyzoa, Geological Magazine, ser. 6. vol. 

 1, p. 438. 



The zoarium is uniserial and incrusting. The zooecia ore pyriform; the 

 gymnocyst is quite convex. It bears on its caudal portion a small avicularium. 

 The opesium is surrounded by large spines. The ovicell is hyperstomial, small. 

 globular, anil salient; it is closed by a special opereuhmi. (See Hi:. ;V"i. p. 141.) 



Genotype. Mnrssonopora dispersa Hagenow, 1839. Upper Senonian. 



Genus ANTROPORA Norman, 1903. 



r.in::. Ai<h-nii<>r<i XOI;\IA\. Natural History of East Finmark, Annals an.l Masrazine Natural 

 History, ser. 7. vol. 12. p. 87. 



The cryptocyst is largely displayed all around the opesium. A pair of avicu- 

 laria with their pointed mandible directed inward, and transversely situated above 



