English: Plate 4 Leuconia glomerosa from J.S. Bowerbanks "Contributions to a General History of the Spongiadae. Part IV"

Fig.1. The type specimenm, natural size. Fig.2. One of the equiangular triradiate spicula of the dermal membrane, magnified 80 linear. Fig. 3. One of the largest-sized fusiformi-acerate dermal spicula, which has been fractured near its middle and cemented together again: magnified 80 linear. Fig. 4. A small-sized fusiformi-acerate dermal spiculum, magnified 80 linear.

Fig. 5 & 6. Two of the triradiate spicula of the interstitial skeleton, magnified 80 linear.