177 



PLATE LXX. 



Ophlitaspongia papilla, Botverhanh. 



VoL ii, p. 378, ' Men. Biit. Spongiadsc.' 



Fig. 1. — Represents the type-specimen, in tlie 

 cabinet of tlie Rev. A. M. Norman. Natural size. 



Fig. 2. — A small piece of tlie skeleton fibre witli its 

 spicula in situ. X 260 linear. 



Fig. 3. — One of the fusiformi-acuate tension spicula 

 of the dermal membrane. X 250. 



Fig. 4.- — A tricurvate, acerate, tension spiculum 

 from the dermal membrane. X 250 linear. 



HAL[ciiiONDrJA FAPJNAEiA, Boiv&rhcmk. 



VoL ii, p. 269, ' Mon. Brit. SpongiadcE.' 



Fig. 5. — Represents a fine specimen of the species 

 from Strangford Lougli coating a valve of Pecten oper- 

 cularis. Natural size. 



Fig. 6. — One of the slender spinulate spicula of the 

 dermal membrane. X 250 linear. 



Fig. 7. — An inflato-cylindrical tension spiculum 

 from the dermal membrane. X 630 linear. 



Fig. 8. — A skeleton spiculum. X 250 linear. 



Veeongia Zetlandica, Bo'werhaul: 



VoL ii, p. 380, ' Mon. Brit. Spongiadas.' 



Fig. 9. — Represents the largest and best developed 

 specimen of the species from Shetland, in the cabinet 

 of the Rev. A. M. Norman. Natural size. 



Fig. 10. — A smaller specimen from the same locality. 

 Natural size. 



Fig. 11. — A small portion of the fibre exhibiting the 



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