Simpson — A Rcr/.s-inii of i/w (7or;/ri)ir///i/iir. ;J57 



(r) Move elon2;ated double-eliilis, merging into doiiblc-spindles. The warts 

 on those are sometimes disposed in whurls : 0084 x 0027 ; 

 0-082 X 0'03; 0'082 x 002G. 



From these measurements it will be seen that there is very little 

 difl'erence in the lengths of the various types, but that the breadths diminish 

 proportionately more than the lengths. Intermediate forms also occur. 



Zoaditij. — Oti' Galle, Ceylon. 



XXIX. — Scirpearia maculata. Figs. 108 and 109. 



Ellisella maculata Studer, xxxiv., p. 629, Taf. iv., fig. 27 {k, h, and c). 



Wlisella maculata (pars) Wright and Studer,!., p. 160, PI. xxxiv., fig. 9. 



Ellisella calamus Studer, xxxiv., p. 660, Taf. v., fig. 28 {a, h, c, d, and c). 



Ellisella calamus Eidley, xxxiii., p. 348. 



It is with considerable hesitation that we still recognize this species as 

 distinct. It has been impossible, however, to examine the type specimen of 

 the species ; but we have seen a Banda specimen in the British Museum, 

 of which Professor Bell has sent me a photograph (fig. 108). The other 

 specimen, from the Torres Straits, described in the " Challenger " Eeport, has 

 proved, on examination of the spicules, to be Juncella gcmmaeea. 



There can be no douljt, however, that Ellisella calamus is the same as 

 Ellisella macidatii, since in spiculation they are identical, and the macroscopic 

 characters on which they are separated are only variational dillerences. This 

 will be evident from the following description. Studer, in describing 

 E. maculcda says : — 



The stem is cylindrical, forked, divided into only a few long cylindrical 

 branches. The colony is 5 cm. in height ; the diameter of the stem is 5 mm., 

 that of a branch 3 mm. One of the branches is 13 cm. in length. 



The stem and branches are covered with verrucae, which hardly project; 

 these occur laterally, on the thicker branches, in several rows, leaving a 

 narrow, shallow median space, which disappears in the twigs. The verrucae 

 have a circular opening. The spicules are (1) double-clubs, 0*095 mm. in 

 length ; and (2) a few warty spindles, 0-084 mm. long. 



The colour of the coenenchyma is orange-red ; the verrucae are dark red. 



Locality. — Mermaid Straits, North-West Australia, 50 fms. 



In separating E. calamus from E. mamdata he gives the following diagnosis 

 of the former : — 



Simple, rod-like, cylindrical stem. The length of the largest specimen 

 is SO cm. The maximum diameter is 2 mm. The axis is horny and 



