246 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Esperiopsis scitula, B., 4, lY and 4, IX. 

 ,, tliompsoni, B., XLIV. 



Genus EspereUa, Yosmaer. 

 External form amorphous or symmetrical. Megas- 

 cleres monactinal. Microscleres palmate anisochelse, to 

 which others may be added. 



Esperella cegagropila, Johnst., LXIII and LXXXIII. 

 ,, constricta, B., LXXI. 



,, copiosa, B., LXXXII. 



,, fallaciosa, B., 4, XYII. 



florea, B., XXXYII. (Hanitsch, 8, p. 202.) 

 ,, intermedia, B., 4, XYII. 



lingua, B., XLYII and LXXYII. (Top- 

 sent, 18, p. 88.) 

 lohata, Mont., LYIII. 

 ,, viacilenta, B., XXXIII. 



,, Totalis, B., XC. 



,, similaris, B., LXXXIX. 



sordida, B., LXXYI. (Hanitsch, 9, p. 214.) 

 ,, suhclavata, B., XXXYII. 



Genus Hamacantha, Gray. 

 Megascleres usually styli. Microscleres typically dian- 

 cistra, with or without sigmata, toxa and trichodragmata. 

 Hamacantha falcula, B., LXXIY. 



Genus Besmacidon, Bowerbank. 

 Megascleres diactinal. Microscleres isochelae and, 

 usually, sigmata. 



Desmacidon cylindraceum, B., 4, YI. 



,, fruticosum, Mont., LXI. (Kidley and 



Dendy, 14, p. 104.) 

 ,, occidtiim, B., LXXIX. 



? ,, pauper culum, B., 4, X. 



Genus Homoeodictya, Ehlers. 

 Usually lobate or palmate. Fibres rich in spongin. 



