190 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



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

 „ tliompsoni, B., XLIV. 



Genus Esperella, Vosmaer. 

 External form amorphous or symmetrical. Megas- 

 cleres monactinal. Micro scleres palmate anisochelse, to 

 which others may be added. 



Esperella cegagropila, Johnst., LXIII and LXXXIII. 

 „ constrict a, B., LXXI. 



„ copiosa, B., LXXXII. 



,, fallaciosa, B., 4, XVII. 



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

 ,, intermedia, B., 4, XVII. 



lingua, B., XLVII and LXXVII. (Top- 

 sent, 18, p. 88.) 

 ,, lob at a, Mont., LVIIL 



,, macilenta, B., XXXIII. 



,, Totalis, B., XC. 



„ similar is, B., LXXXIX. 



sordida, B. ; LXXVI. (Hanitsch, 9, p. 214.) 

 „ subclavata , B., XXXVII. 



Genus Hamacantha, Graj 7 . 

 Megascleres usually styli. Microscleres typically dian- 

 cistra, with or without sigrnata, toxa and trichodragmata. 

 Hamacantha f alcula, B., LXXIV. 



Genus Desmacidon, Bowerbank. 

 Megascleres diactinal. Microscleres isochelae and, 

 usually, sigrnata. 



Desmacidon cylindraceum, B., 4, VI. 



,, fruticosum, Mont., LXI. (Eidley and 



Dendy, 14, p. 104.) 

 ,, occultum, B., LXXJX. 



? ,, pauper cidum, B., 4, X. 



Genus Homwodictya, Ehlers. 

 Usually lobate or palmate. Fibres rich in spongin, 



