263 



PLATE LXXXII. 



IsoDiCTYA LUPJDA, Bowerhank. 



Vol. ii, p. 336, 'Mon. Brit. Spongiada).' 



Fig. 1. — This specimen is a very mucli finer and more 

 cliaracteristic one tlian the type-specimen as quoted 

 above. 



Desmacidon copiosa, Bowerban/c. 



Fig. 2. — Represents the type-specimen of the species 

 in the cabinet of the Rev. A. M. Norman. Natural 

 size. 



Fig. 3. — One of the large sub-clavate, acuate skeleton 

 spicula. X 260 linear. This figure also represents 

 the spicula of the dermal network. 



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

 the dermal membrane. X 530 linear. 



Fig. 5. — One of the large contort, bihamate, retentive 

 spicula of the dermal membrane. X 630 hnear. 



Fig. 6. — A dendato-inequi-palmate-anchorate, reten- 

 tive spiculum from the dermal membrane. X 630 

 linear. 



Fig. 7. — One of the bidentate-inequi-anchorate 

 spicula from the dermal membrane. X 530 linear. 



Fig. 8. — One of the slender subclavate, fusiformi- 

 acuate tension spicula from the interstitial membranes. 

 X 250 linear, 



Desmacidon caveknula, Boum-hank. 



Y\g. 9. — Represents the type-specimen in the dried 

 state. Natural size. 



