242 ZOOPHYTOLOGY. 
covered with numerous long spines, many of which are bi- or trifureate?* 
polyzoary composed of narrow ligulate, or subcylindrical, irregularly dichoto- 
mous, lax branches ; ovicells 
Diachoris hirtissima ? Heller, ‘ Verhand. d. k. k. bot. zool. Ge- 
sellsch. in Wien.,’ xvii, 1867, p. 18. Pl. i, figs. 6, 7. 
Hab. Cape of Good Hope, Dr. Rubidge. 
This is a very curious form, and we are not sure that it is 
not identical witha species recently described by Prof. Cam. 
Heller, from the Adriatic. But as we have not been able to 
perceive the six connecting links of the cells characteristic of 
' the genus Diachoris, in our specimen, we have thought it 
better for the present to regard the two as distinct. Prof. 
Heller figures and describes the connecting-tubes in his Dia- 
choris hirtissima so clearly that he cannot have been mistaken 
in seeing them. At the same time, the general resemblance of 
his species with ours is so striking that it is almost impossible 
to believe that they can be distinct. Should the mode of 
intercellular connection be as he states it, there can be no 
doubt that Chaunosia (xavvoc, laxus) must be merged in Dia- 
choris. 
Sub-Order 2. Cycuostomara. 
Fam. Diastoporipm™, Busk. (‘Crag Polyzoa,’ p. 113.) 
Gen. Zennysonia, n. gen. 
Polyzoary arising from a rather thick central base (substipitate) ; lobate, 
stelliform ; lobes curved, with a median angle; tubes wholly immersed ; 
orifices disposed in straight lines, extending from the median angle to the 
denticulate margin of the lobes ; interspaces cancellous. 
Hab. Cape of Good Hope, parasitic upon Oxchopora tubulosa. Dr. 
Rubidge (Mrs. Gatty). 
This is an extremely beautiful form, which is provisionally 
referred to the family Diastoporide, in which it appears to 
be most closely allied to Discoporella, Gray (as defined in 
‘Crag Polyzoa,’ p.115). In that genus, however, the poly- 
zoary is normally sessile or adnate, and of a disciform shape, 
sometimes rising into more or less of a cone, and the tubes 
are not wholly immersed, but have their notched or toothed 
mouths usually considerably exserted. In Defrancia, which 
is closely allied to Discoporella, the orifices of the immersed 
tubes are placed on elevated ridges, radiating more or less 
regularly from the centre of the discoid polyzoary, the inter- 
stices being sometimes cancellous, as they are in some species 
of Discoporella. 
The polyzoary of Tennysonia, which is represented of the 
size of nature in fig. 10, is of a pale rose tint, and semitrans- 
parent, whence it has a very elegant appearance. ‘The gene- 
ric name is given to this species at the express desire of Mrs. 
