ALCYONIID^E. 267 



PLATE I. 



Fig. 1. Saarcophytvm bicolor, n. sp. Drawing of the smaller specimen, which has no capitular marginal 

 seam. Autozooids and siphonozooids are of a beautiful creamy white colour, the remaining portion of the 

 colony being dark grey, x 2. 



Fig. 2. Sarcophytum bicolor, n. sp. Different forms of spicules. x 60. 



Fig. 3. Sarcophyhuii oligolrenui, n. sp. Drawing to show cup-like form of colony, x li. The autozooids 

 on the margin are smaller and relatively more numerous than in the middle of the capitulum. Siphono- 

 zooids are very few in number in this species. 



Fig. 4. Safrrophylwm oligotmna, n. sp. Surface view of a decalcified fragment of the capitulum, about 

 an inch from the margin, to show the relative abundance of autozooids and of siphonozooids. x 27. 



Fig. 5. Sarmpliytuin oligolrenui, n. sp. Three warted spicules. x 60. 



Fig. 6. Sarcophytnm amlorliini, n. sp. Drawing to show the complicated folding inwards of the capitular 

 marginal lobes (c.m.l.). All these lobes arise as marginal ingrowths and not, as in Lobopkytum and iSW/r- 

 phytum, from the general surface of the capitulum. Autozooids and siphonozooids in this specimen can 

 only be seen with the aid of a lens and arc, therefore, not indicated in the drawing, x 11. 



Fig. 7. Sarcophytum contortnm, n. sp. Three warted spicules. x 60. 



PLATE II. 



Fig. 8. Sdvroplnjlum henlmani, n. sp. From a photograph, showing the zooids on the stalk. About 

 | nat. size. 



Fig. 9. Sdcrophytum herdmani, n. sp. Drawings of the different forms of spicules found in this species. 

 a.b.c. x 7. d.e.f. x 60. 



Fig. 10. Alcyunium rcylonicmn, n. sp. From a photograph. About |- nat. size. 



Fig. 11. Akyonium ceylonicum. A contracted autozooid showing 2 large dorsal mesenterial filaments 

 and a ventral mesentery which has no filament, x 60. 



Fig. 12. Alnjonium ceyltmiatm. Three spicules characteristic of the species, x 140. 



Fig. 13. Nematocysts of a. Sareophytum rosettm. Actual size 8'5/* by 4'5/^. 



b. Sckrcpkytum dvnsnm. Actual size 6/u by 4 - 5/*. 



c. Sarcophyium glaumm. Actual size 20/* by 12/t. 



(/. Lobojihylum jmurijiorum. Actual size 7/ by 2'5/t. 



The nematocysts of Sarcophytinn glaumm are enormous. The threiid is loosely coiled within the cell. 

 The internal portion of the thread stains more deeply than the external. 



Fig. 14. .lli'i/iiniiii/i i/ii/i/ti/i/ii/ (liritish). Drawing of an extended living tentacle, showing the batteries 

 of nematocysts and the single bi-lateral row of pinnules (l/.m-.). Cam. Inc. x 26. 



Fig. 15. Isobopliyiiuii puKnjlorum. An autozooid tentacle, showing the asymmetrical arrangement of 

 pinnules, x 60. Cam. Inc. The tentacles of the tropical species are usually much smaller than those of 

 the British species (fig. 14). 



Fig. 16. Seieropkgtvm <!rnsuin. Zoochlorell; : a and h show early stages of sporogenesis. The 

 cellulose cell walls have disappeared, and the protoplasm and nuclei of the cells show unmistakable signs 

 of division. In b the division is more complete than in -. r. represents two very young zoochlorelhe I 

 have been unable to observe the intermediate stages between /> and r. (ixlSOO, 6x1600, ex 1200. 

 Cam. Inc. 



2 M 2 



