38 



Facet F and facet F' consist of the ridges s, /, }i, k of wliich ridge k meets i- at the 

 top near point d' . 



Somatocyst (PI. VI, fig. 47 soni}). 



The somatocyst has a length of 4Vj mm., a breadth of 3 mm. It is situated partly 

 underneath the ridges lateral of the complex facet D -\~ CII -\- CI. It is of a splendid retort- 

 shape and shows a wall with an irregular network of cells. These are not so well preserved as 

 in Abyla Letickarti. Near the upper part of the posterior side one small canal branches off 

 which goes to the hydroecium and from there probably to the nectosac. 



The hydroecium is a three-sided cavity, lined by the ridges y, f (point c) and i. Point e' 

 is overhanging the walls of this cavity and these gradually disappear underneath this projecting 

 point. The length of this very big hydroecial cavity is on the nectosac-side 8 mm., on the 

 somatocyst-side 5 mm. 



Of stem and appendages little is to be said as we had to leave this unique specimen 

 of a new genus absolutely intact. 



By the reflection of direct sunlight on the mirror of the microscope we were able to lighten 

 u]) the interior of the hydroecium. Then we saw quite clearly, two mature siphons, two young 

 undeveloped siphons, an undistinguishable cluster, probably a cluster of tentilla and a young bract. 



The largest siphon was 3 mm. long, i mm. broad, distinctly divided into a stomach 

 and a basigaster. 



The bract, assumes, as far as we can see, a leaf-like shape, such as some Physophorid- 

 bracts show. (fig. 47 br}j. It is not mature, as it shows yet various conglomerations of cells on 

 the .surface; the canal of the bract is very broad, which also shows the relative age of this 

 bract. On one side the ridge is very sharply serrated. On the whole the bract has not a 

 Calycophorid-VikQ apj^earance. 



The nectosac measures 1 9 mm. from its aperture to the curved part of the nectophore ; 

 from there to the top d' it measures about 10 mm. It is broadest at its base (2 mm.) this 

 continues to the level of the somatocyst; then it diminishes gradually. From some way beneath 

 the curved part, its wall is very much damaged going upwards but it is clear and well-preserved 

 again near its apex. The apex of the nectosac lies 3 mm. downward from point d' . 



So the nectosac is really the only interior part which is Dip/iytd-\[\^&. 



We spoke about the canal which runs along the top of the hydroecium. It continues its 

 course proximally upwards and divides itself, when it has arrived in the middle of the nectosac 

 into probably four canals. Two of these go immediately to the lateral walls of the nectosac, 

 they go on proximally and end below on the side of facet E. 



Another canal follows probably the hindwall of the nectosac, but it is nearly invisible, 

 especially as the wall near the curved point is nearly destroyed. But we suppose there might 

 be one, as at the top of the nectosac there is an agglomeration of substance (? pigment) as is 

 found in Dipliyids and MonopJiyids and traces of the canal going upwards and downwards 

 (f. i. Diphyopsis campatmlifera O. et G.). There is probably also a dorsal canal. We could 

 not find out whether these canals are in connection with one another at the base through 

 a ring-canal. 



