EEVISION "BEITISH SPONGIADiE." 241 



b. Sub-family Kenieein^, Kidley and Dendy. 

 Skeleton confused or regular. Spongin may be present, 

 but never completely enveloping the spicules. Micros- 

 cleres rarely present. 



Genus Halichondria, Fleming. 

 Skeleton confused, never regularly reticulate. Megas- 

 cleres oxea or strongyla. Spongin scarcely appreciable. 

 No microscleres. 



HalicJiondria albescens, Johnst., XXXI. 

 ,, ambigua, B., LXXIV. 



bretti, B., XXX. 

 ,, caduca, B., XLI. (Kidley & Dendy, 14, 



p. 3.) 

 ,, coalita, Grant, XLI. 



,, coccinea, B., XXX. 



,, condensa, B., 4, VI. 



,, coralloides, B., 4, VII. 



,. distorta, B., XLII. 



,, edicsa, B., LXXIII. 



,, fallaciosa, B., XXXI. 



firma, B., LXXII. 

 ,, fragilis, B., XXX. 



,, glabra, B., XLI. 



,, incerta, B., XLI. 



,, inconspicua, B., XLI. 



lactea, B., XXXII. 

 ,, maciutoshi, B., XCI. 



,, menibrana, B., XXXII. 



,, paiiicea, Pallas, XXXIX. (Grentzen- 



berg, 5, p. 11.) 

 ,, regularis, B., LXXIII. 



,, reticulata, B., XXXI. 



,, solida, B,, 4, III. 



,, tegeticula, B., LXXIV. 



