684 EXPLANATION OP THE PIATES. 



Fig. h. Clathria moeandrina, the stout and slender smooth acerate, 

 and the spined acuate spicules, x 190. h', the tricurvate 

 acerate, and A", the equianehorate spicules (the latter 

 from the front and side), x 370. From type specimen 

 from Marie Louise Island. 



i. Beniera, sp. allied to jB. crateriformis, average form of 

 skeleton- spicule, x 68. From specimen from Providence 

 Island. 



j. Bhizochalina pdltidda, the skeleton-spicule, X 190. From 

 type specimen from Providence Island. 



k. Leucophlaeus proteus, the skeleton-spicule, x 68. From 

 specimen from Providence Eeef. 



I. Eehinonema gracile, the skeleton- and echinating spicules, 

 X 190. V, the, tricurvate acerate, and I", equianehorate 

 spicules, x370. From type specimen from Providence 

 Eeef. 



m. Desmacidon rimosa, the skeleton-, and m', tricurvate 

 acerate spicules, X 190 ; m", the equianehorate, from the 

 front and side, x 370. From type specimen from Mozam- 

 bique. 



n. Beniera camerata, the skeleton-spicule, x 190. From type 

 specimen from Marie Louise Island, Amirantes. 



0. B. cribriformis, the skeleton-spicule, x 190. From type 

 specimen from SeycheUe Islands. 



p. Spirastrella jpunctulata, the skeleton-spicule, X 190. p', 

 the spinispirular flesh-spicules, X 370. From type speci- 

 men from Mozambique. 



}. 8. trandtoria, the skeleton-spicule, X 190. q', the spini- 

 spirular flesh-spicules and curiously attenuated variety of 

 apex, X 370. From type specimen from Darros Island. 



Printed by Tayiob and Fbancis, Bed Lion Court, Fleet Street. 



