130 Rev. Canon Norman — A }fonth on 



Jullien has united IJippothoa patagonica, Busk, with 

 C. hyalina. The North-Atlantic species of Hippothoa, 

 H. divaricata^ II. Jlagellam, and //. expansa, all have the 

 ooecia borne on imperfectly-developed cells, and the latter 

 often has the zooecia in clusters instead of following the usual 

 unicellular arrangement. If Ilippothoa is not to be united 

 with Celleporella [Diazeuxia, Jullien) it certainly comes 

 very near it. Since Jullien apparently declines even to place 

 them in the same family, it is better to wait for his further 

 views rather than at once merge Celleporella in the earlier 

 genus Ilippothoa. Jullien states that there is only one 

 European genus and species of his family Diazeuxidees ; and 

 of Ilippothoa divaricata he writes : — " Smitt dejk avait indi- 

 qu^ V Ilippothoa divaricata, Lamouroux, com me ^tant une 

 vari^t^ de sa Mollia hyalina, qui n'est autre que la Cellepnra 

 hyalina. JMais V Ilippothoa divaricata est tellement differente 

 de la Cellepora hyalina, que je me refuse a admettre cette 

 manifere de voir." 



I quite agree in not uniting these species ; the zooecia of 

 H. divaricata are much more produced, and the ocecia are 

 imperforate, while in 0. hyalina they are always punctated ; 

 but Jullien has not yet explained why he docs not unite the 

 genera, nor referred in any way to the similarity of the 

 ocecium-cells exhibited in Celleporella (Diazeiuvia) and Ilip- 

 pothoa. The illustrations which he gives of tiie ooeciura-cells 

 of D. hyalina, var. patagonica, closely accord with those of 

 Ilippothoa. 



23. Ilornera lichenoides, Linn. 

 On the precipices at Riidberg. 



24. Ilornera violacea, M. Sars. 

 Rodberg, on precipices. 



25. Idmonea atlantica, E. Forbes. 

 Rodberg, 70-250 fathoms. 



2G. Stomatopora dilatans^ .Jul ins ton. 

 On a stone, deep water, HiHlherg. 



27. Diastopora ohelia, Johnston. 

 Rodberg. 



28. Lichen( porn hispida, FLMning. 

 Trondlijeni and Riidberg. 



