ZOOPHYTOLOGY. 281 



the considerable number of spines, in the simple, smooth 

 peristome, and in the form of the pedunculate operculum. 



As the only specimen brought on this occasion by Mr. 

 Johnson is small and imperfect, and has moreover been 

 injured since it came under my inspection, I have de- 

 ferred making a figure of the species until further specimens, 

 as I hope, may enable me to do so with greater advantage. 



2. S. Macandrei, Bk. 



This species may be at once distinguished by the broad, 

 granular peristome, and contracted, sub-orbicular form of the 

 orifice. In the B. M. Cat., I have described and figured 

 it as being usually without marginal spines, but in the 

 present instance it has two or three on the outer and upper 

 margin, and one or sometimes two on the inner. From 

 S. Delilii, Aud. (sp.), it is distinguished by the total absence 

 of anterior avicularia. The present species may perhaps be 

 identical with S. ciliata, Aud. (sp.) (' Egypt/ pi. xii, fig. 2), 

 but if so, the drawing does not exhibit the granular peri- 

 stome, nor the toothed, radical tube ; and moreover, in that 

 species the lowest marginal spine on the outside is represented 

 as forked. 



Fain. 4. Cabereid.e, Bk. 

 Geu. i. Caberea, Bk. 

 1. C. Boryi, Audouiu. 



Thus adding another stage in the progress of this species 

 from the southern hemisphere towards the British Channel. 



Pam. 5. Scrupariid^;, Bk. 



Gen. 5. Scntparia, Oken. 



1. S. diaphana, n. sp. PL XXXI, figs. 1, 1 a. 



Polgzoario libero, suberecto, irregulariter ramoso ; cellulis elongatis, 

 diaphanis, antice sparse perforutis ; orificio orbicularis infra sinuato, peri- 

 stoma te valde produclo super ne emarginato ; ramis, cellulce parte superiori uno 

 latere surgenlibus. 



Polyzoarium free, phytoid, sub-erect, irregularly bra-iched ; cells elongate, 

 walls transparent, sparsely punctured in front ; orifice orbicular, sinuated 

 below, peristome thin, produced, notched above ; branches springing from 

 one side of cell at the top. 



Bab. — Madeira, abundant, /. Y. J. 



A beautiful and very distinct form. From the extreme trans- 

 parency of the walls, they appear at first sight as if they were 

 composed simply of a chitinous substance, but when incine- 

 rated, sufficient calcareous matter is left perfectly to retain 

 the form of the cell. 



