PLATE XCVIII. 



PAGE 



Sclerothamnus clavsii, W. Marshall, 337 



Ficr. 1. Copy of Dr. Jas. Murie's figure of a dried specimen ; x 0'25. 



Fig. 2. Copy of Murie's figure of a branch of the stock ; x 0'5. 



Fig. 3. Longitudinal section of a branch ; x 0'5. 



Fig. 4. Copy of Murie's figure of the surface ; natural size 



Fig. 5. Vertical section of the outer part of the skeleton, with the loose spicules 

 in natural position ; x .50. 



Fig. 6. Sphferohexaster with outwardly bent terminal rays ; x 450. 



Fio-s. 7, 8. Parenchymal scopula-like spicules with l^iiotted stalk and very 

 divergent prongs ; x 450. 



Fig. 9. Dermal scopula ; x 450. 



Fig. 10. Uncinatum ; x 450. 



Fig., 11. Free conical prominence of the dictyonal framework beset with Inroad 

 low toothed prongs ; x 450. 



