230 



the strongly arched basal surface is divided into dendritically hianchcd longi- 

 tudinal bells. 



The lateral chambers. The scapular as well as the inlVa-scaiJular cluunber 

 is Uirned sliglilly frontally. It is in most cases develojjed as an aviculariuni of 

 very variable size, wliicli may allain a considerable, sometimes enormous size 

 especially in the branches consisting of single zooecia only. The infra-scapular 

 chamber, which has generally a long oval opening, terminates in a ])rojecling, 

 conical, membranous portion, which forms an angle with llie aviculariuni. Tlie 

 pedal clKunbei-, wliicli in tbe zoo'cia with a large avicularium almost reaches 

 righl up to Hie infra-scapular chamber, is usually separated from Ihe laller by 

 a rather short intermediate space. It is provided with a wholly frontal and at 

 least in the single zoa>cia longitudinally oval or pear-shaped opening. The infra- 

 scapular, adzocccial chamber of the mother-zocecium is wanting in Ihe bizoa-cial 

 segment. 



The ooecium. The gonozoa^cium, which is of about the same length as the 

 covering kenozoci'cium, takes its origin either directly from a molber-zocrcium or 

 from an inserted single zoa-cinni. The aperture is provided willi a broad, more 

 or less regular, sometimes extremely indistinct sinus, in which the narrow distal 

 ends of the two outermost of the ;5- o fenestra- of the sternal area often termin- 

 ate. No sjjines. On either side 1 — 2 small, oval chandlers, Ihe distal of which is 

 often very small or absent, sometimes on one sometimes on both sides. 



The covering kenozoa'cium has on either side a large, long, frontally poiiiUil, 

 basally broadl}' rounded, uncalcified portion, through which the oo'cium can be 

 seen. The latter is here jjrovided with a longiludiually clid)-shaped, very dense 

 collection of pores, the intermediate spaces of which partly project as tubercles. 

 In the frontal portion between the tw'o areas as well as along the distal and 

 proximal margins of the latter the oo'ciuui and the covering kenozooecium are 

 connected with each other by a great many robust spinous processes, and the 

 kenozon-ciuni has in the centre of its frontal surface a chamber develo])ed lo a 

 varying extent, which is sometimes mostly mend)ranous and somelinies devel()|)ed 

 as a rather high aviculariuni. In the latter case it is connected on eilhei' side 

 wilh a [)artially mendiranous chamber, of which Ibe one si(k' joining the oj)er- 

 cular end of the avicularium is somewhat higher than the otlu r. In sjiilc of the 

 median position of these chandjers they may be regarded as corresponding lo 

 the three lateral chambers on one side in an ordinary zon-cium. 



Form of colony. In Ihe ])rincipal axis and Ihe iirincipal branches springing 

 from it two bizoa-cial segments succeed each other with a single zou'cium be- 

 tween {'2, 2, 1, 2, 2, 1 ). 



