Manchester Memoirs, Vol. xlii. (1898), No. 13. 13 



as well as the tropics, in shallow to fairly deep water 

 (greatest depth recorded, 150 fathoms). The species 

 M. uncifera is recorded only from the southern hemisphere. 



Microporella. Genus cosmopolitan. 



Microporella ciliata is also cosmopolitan ; the speci- 

 mens taken at greatest depths have been limited to 

 temperate regions, namely : Bahusia, on the Falmouth 

 and Lisbon cable, 47° N., 89-205 fath. ; and the coast of 

 Norway, 300 fath. The tropical specimens occur in fairly 

 shallow water. 



The species M. malusii occurs north and south of, but 

 not within, the tropics in fairly shallow water (10-50 

 fath.). It occurs fossil ; coralline crag, older pliocene 

 (Castrocaro). 



Mucronella. The genus is cosmopolitan, from fairly 

 deep water, but the species M. tricuspis appears to be 

 restricted to the southern hemisphere, from shallow to 

 fairly deep water, 12-150 fath. Fossil — tertiary — New 

 Zealand. The species occurring at the greatest depths 

 occur also in temperate regions, with one exception — 

 Challenger Station 122, off East coast of South America, 

 9° 5' S. ; the species M. castanea occurs from 32-400 fath., 

 and, with this exception, all other tropical species occur in 

 fairly shallow water. Many of the species of this genus 

 are fossil, occurring in coralline crag, middle pliocene, 

 upper pliocene, palaeolithic, Scottish glacial deposits, &c. 



Schizoporelta. The genus is cosmopolitan. The 

 species 5. Jiyalina is cosmopolitan, it occurs on shells, 

 stones, weed, etc., from shallow to deep water, it is fossil, 

 and occurs in coralline crag, Scottish glacial deposits, 

 post-pliocene deposits (Canada). Greatest depth : of 

 species 100 fath. (Davis St.), of the genus 300 fath. (off 

 Norway). 



Both the cosmopolitan species ScJiizoporella hyalhia 



