iniVOZOA I'MiOM Kli'.VN/i-.IOSKl'' ljA,NI>, 175 



been al)lo lo woo in I), inlricarin, for tlio iiuil.ui'ini \v:is iiol; 

 I'livourablo, as in niost Ciiwcs Mio zoiui;iu vvcu'u empty and tlio 

 zoariuin was dead. 



Tlio llaUoncd brautdit'H (I'l. 19. d^'. L') locni an anMnLoiuosins;; 

 network as soon in lig. 1, and evidently tlio colonies may fjrow 

 lo a conaiderable size, probably extending to considerably over 

 six iiicbea in lonj^th and widtli. The llattonod brauolies may be 

 considered a series of irregular lobes, with the zocecia arranged 

 niovi! or less in series, and in some |)arts the zoa'ciul tubes are 

 very long, projecting at right angles to a branch (see iig. 5) ; in 

 other ])arts Ihe zomcia do not exti'iul beyond the snrl'a.ee (fig. H). 

 Then; an5 zoiecia on the dorsal (lowei-) surface o\ the zoariiun 

 (Iig. 4). A nuirived characteristic is the wavy arrangement of 

 the zo(XH-ia, vvliich is well seen in balsam preparations, as well as 

 in sections of the calcareous parts (fig. Hi), and such sections 

 show some irregular denticles in the walls. 



The ovicells are largo and considerably raised (figs. 4 & G), 

 witii the zocecial tubes in some cases projecting much abovi* the 

 ovicelluhir wall; in other cases they aro at about the level of the 

 wall, as are also the adventitious tubules, while theso and the 

 zo(ecia both iuivo perforated closures. 'IMie ovicelluhir duct is 

 rather snuiU and does not expand into a funnel, and not more 

 timn one has been found to an ovicell. The ovicell, which spreads 

 irregularly between thojcooocial tubes, contains a large number of 

 snuiJI embryos ; there will usually be nu)re than 100 at the same 

 time (fig. 12). 



There are 12 tentacles. 



If the broken fragments, frcnn some of the bottles, had been 

 found fossil, they would probably have been arranged undei* 

 various genera and many species. We have the ends of the 

 branches (PI. 19. fig. J3), which quite coiToapond with Cretaceous 

 RelUndipora; some of the fragments of tlie older part of the flat 

 branches resemble in sha[)e thcf Crag Mesenterlpora ; and again, 

 pieces with prolonged zoujcial tubes (ligs. 4, 5) would have been 

 separated from those in which the zooecia do not project *. 



Loc. Spitzbergen {Nord/j. c^ Bidc.n.), 05-300 fath. (JJiden., 



* 'I'liiil. wo iiro atill only n(,rugf^liiig f.owardu a siitisriictury class! liwition of 

 Iho (JyclostoiiiaUi may bo soon fVoiu Uio liu^t (hat i'orgonH iu "Tabl. Wyii. do la 

 CJlaHsilical.ioii," liev. dcs Ery. p. ."JljC), liaa i)laood Dias/opura under tlio faruily 

 I)iast<)i)()ricla!, lieticidipont iiudcr tlio family idmouoidui, and Jtidiadopora and 

 Mesenteripora under Entalophoridoe. 



