CABEREA 373 



Branches biserial, rather broad and flat. 



Zooecia (Fig. 20 C, D) with one or two outer distal spines and one peduncular spine. 

 Cryptocyst little, if at all, wider proximally, granular except in young zooecia, edge 

 usually smooth, rarely a little roughened or beaded near base of scutum. Calcareous 

 bar, across opesia, forming proximal border of orifice. 



Scutum fused to bar, distal lobe inconspicuous, proximal lobe of variable size, usually 

 small and appearing as an appendage from bar, sometimes covering opesia and having 

 point towards stalk as in Caberea helicina and C. boryi. 



Operculum well chitinized. 



Frontal avicularia small, showing usual reversal of direction on fertile zooecia. 



Marginal avicularia with tendency to moderate enlargement, palatal surface sloping 

 obliquely towards frontal surface of branch (Fig. 20 D). 



Vibracula (Fig. 20 B) covering large part of basal surface, groove not very long in 

 proportion to chamber, appearance of a second bridge may be marked (cf. p. 366). 



Ovicells variable, usually wider than long, with large part of the ectooecium un- 

 calcified. 



Remarks. Gray's description, which was based on material sent from New Zealand 

 by Dr Sinclair, would apply to any biserial Caberea, but the only biserial Caberea among 

 Sinclair's New Zealand specimens in the British Museum belongs to the present species. 

 It is, however, probably not the specimen described by Gray. Unlike the majority of 

 Sinclair's specimens, it bears no date, but the evidence of labelling, though not con- 

 clusive, points to its having been received with a later batch than that described by Gray 

 in 1843. It was not named by Gray, although the other particulars are in his hand- 

 writing. There is thus no type-specimen of C. zelandica. 



Busk used Gray's name (which he spelt zelanicd) first for a species from Cumberland 

 Island (1852a), and later, in the B.M. Catalogue, for the present species which he figured 

 recognizably though not very accurately (18526, pi. xvi, figs. 4, 5). By the time the text 

 of the catalogue was completed he had decided to include both of these in C. boryi, as 

 well as a South American Caberea which he had called C. patagonica on the plate, 

 regarding them as variations due to " age and other circumstances ". This was, however, 

 not his final opinion, for in 1884 he reinstated the South American species as C. darwinii, 

 introduced a new name, C. lyallii, for C. zelandica Gray, and pointed out that the 

 supposed C. zelandica from Cumberland Island (see p. 367) was distinct from the New 

 Zealand species. Of the specimens included in C. boryi in the B.M. Catalogue, only 

 those from Devon and Algoa Bay were left in C. boryi, as appears from his statement of 

 the distribution of "the true C. boryi of Audouin". 



The sentence in which he introduced the name C. lyallii makes it quite clear that he 

 believed C. zelandica Gray to be represented by a New Zealand species which he had 

 formerly called by Gray's name. This could only be the New Zealand material of the 

 B.M. Catalogue, i.e. the present species. As Busk was working on the British Museum 

 collections when Gray was in charge of them, and only a few years after Gray's work 

 was published, it may be assumed that at the time of writing his B.M. Catalogue he 

 knew which species Gray intended. His figures of C. zelandica may thus be taken as 



