84 



ON SPONGES FROM THE MEEGTJI ARCHIPELAGO. 



Plate VI. 



Figs. 1 & 2. Isodictya simulans, Bowerbank. 1. A branched fragment, var. 

 tubuloramosa, nat. size. 2. The variety incrustans, also natural size. 



Figs. 3-6. Esperia indica, n. sp. The various kinds of spicules, all greatly 

 magnified to scale. 3. Two acuate skeletal spicules. 4. The inequi- 

 anchorate spicules ; side and front views. 5. Various-sized bihamate 

 flesh-spicules. 6. Minute acerate fiesh-spicules (trichites). 



Figs. 7 & 8. Suberites trincomaliensis, n. sp. 7. A pin-like skeletal spicule. 

 8. Spinispirular flesh-spicules. All magnified to one scale. 



Figs. 9-14. Stelletta bacilli/era, n. sp. Spicules of various sorts, all highly 

 magnified to the same scale. 9. Two zone-spicules. 10, Anchor, 

 and 11, a fork-spicule. 12. Minute microspined bacilliform spicules. 

 13 and 14 (enlarged). Minute stellate fiesh-spicules. 



Plate VII. 



Figs. 1-3. Fibularia ramosa, Carter. 1. A portion of the sponge on a Gorgonia, 

 of nat. size. 2. The whole specimen, much reduced, showing the 

 habit of growth. 3. A small portion, enlarged 3 diam., showing the 

 reticulate character of the surface. 



Figs. 4 & 5. Suberites coronarius, Carter. 4. A spinulate spicule. 5. Crown- 

 like flesh-spicules, all magnified. 



Figs. 6 & 7. Axinella virgultosa, var. massa, nov. Two different views of the 

 exterior of this variety of sponge, both natural size. 6, the upper, 

 and 7, the side view. 



