-\~\ earest to the Cellularice, though in the family of the Cellariece (Salicornariadce), 

 Busk has placed the genus Nellia, justly remarking the cellularian conformation of its 

 zooecia. And indeed it seems me most properly to be conjoined, systematically, with 

 that type. But the reasons for ray opinion best will be understood here in compa- 

 ring it with some other forms, showing the relations between the Cellularian, Flustridan 

 and Menibranipoi^idan types. 



Nellia oculata *) (Pl. 1, figs. 53 and 54). 



In its geographical distribution, it exhibits a very great interest as being one of 

 the species common for the Australian and Caribbean seas. I need only to refer to a 

 comparison between my figures and those given by Busk, which readily will show the 

 specifical identity. 



As to the constitution of this species, the "two raised hollow, perforated, papilli- 

 "form processes below the aperture" (Busk) in reality are true avicularia, one pair at 

 each side of the zocecion; but very often they are defective, especially the lowest one 

 in each pair, in wanting the operculum (mandible), thus presenting the opening closed 

 only by a membrane; and their minute size (the breadth of their aperture being about 

 0,02 min.) often makes it very difficult to discover the articulation of the mandible. 

 The radical tubes spring out from the middle of the front side, just below the apertu- 

 ral area of the zooecia, thus presenting the most remarkable difference from the Cellu- 

 larian and more properly answering to the budding of new zooecia or branches on the 

 Eucratea as well as of the radical tubes on the Cellarice and Escharella palmata 2 ). 



Pourtales has taken some small colonies of this species at very different depths, 

 once from 13, another time from 138 fathoms. 



To the genus Farcimia, what name otherwise would have no right to be retained 

 in the science, Count Pourtales has referred the new species described by him under 

 the name of \ 



Farcimia cereus 3 ) (Pl. 1, figs. 55 and 56), 



which, we think, must be regarded as a distinct generical type, claiming its own name. 

 Thus, after Pourtales, we may take up the generical denomination Farcimia, first 

 given by Fleming, but hitherto superfluous as being only a synonyme of the name 

 Cellaria. Such a new genus, Farcimia, must be characterized, then, by its Membrani- 

 poridan zooecia associated to form a Cellarian stem and calcified beneath the original 



!) Busk, Cat. Polyz. Brit. Mus., p. 18, pl. LXIV, lig. 6; pl. LXV (bis) fig. 4. 

 2 ) Öfvers. Vet. Akad. Föih. 1867, Bih. p. 80. 

 ) Bull. Mus. Comp. Zool., Harv. Coll., Cambr., N:o 6, p. 110. 



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