684 EXPLANATION OF THE PLATES. 



Fig. h. Clathria mceandrina, the stout and slender smooth acerato, 

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

 acerate, and 7i", the equianchoratc spicules (the latter 

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

 from Marie Louise Island. 



i. Reniera, sp. allied to R. crate rifor mis, average form of 

 skeleton-spicule, x 68. From specimen from Providence 

 Island. 



j. Rhizochalina pellucida, the skeleton-spicule, x 190. From 

 type specimen from Providence Island. 



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

 specimen from Providence Ileef. 



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

 X 190. V, the tricurvate acerate, and /", equianchorate 

 spicules, x370. From typo specimen from Providence 

 Keef. 



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

 acerate spicules, x 190 ; m", the equianchorate, from the 

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

 bique. 



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

 specimen from Marie Louise Island, Amirantes. 



o. R. cribriformis, the skeleton-spicule, x 190. From type 

 specimen from Seychelle Islands. 



p. SpirastrelJa punctulata, the skeleton-spicule, x 190. p', 

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

 men from Mozambique. 



q. S. transitoria, 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 Taylor and Fkancis, Ked Lion Court, Fleet Street. 



