THAKELL1A. 49 



lias been found by Schmidt among the Sponges 

 dredged by Pourtales off Florida in 324 fathoms 

 (' Spong. Atlant.,' p. 62) ; and in the " Porcupine" 

 dredgings in the North Atlantic it was procured from 

 the still greater depth of 640 fathoms (Carter, 1. c.)- 



Among the editor's specimens from Shetland is one 

 which is ten inches high, and a foot in diameter across 

 the edge of the cup. Another very beautiful example 

 is only three inches high, but expands very widely, 

 and has a greatest diameter of thirteen inches, while 

 its surface is proliferous with seven or eight young 

 specimens springing from it. 



Genus 16. MICROCIONA, Bow., i, 188 ; n, 7. 



1. MICROCIONA FICTITIA, Bow., ii, 124; in, 352; PL 

 XXIII, figs. 16, and LXXXII, fig. 20. 



Habitat. Westport Bay, Co. Mayo ; colour when 

 living yellow, very glairy with abundant sarcode (N.). 



One of the specimens from Westport Bay is a large 

 mass, which measures in the dried state three and a 

 half inches long, two and a half wide, and one and a 

 half thick. It has numerous pieces of Gorallina and 

 Nullipora, as well as several small pebbles, em- 

 bedded in its substance. It was dredged in about five 

 fathoms. 



2. MICROCIONA KENTII, Bow., in, 317; PI. LXXXIX, 

 figs. 913. 



In Yol. Ill, p. 311, fig. 9, for "represents the type 

 VOL. iv. 4 



