437 
of the sponge-body; there are no special cortical brushes of me- 
gascleres; the fibres of the interior run right through to the sur- 
face; the big dichotriaenes are, however, mainly restricted to the 
Fig. 1. Myriastra biforniis 
nov. spec. a. Orthotriaene wilh 
recurved cladi. h. Orthotriaene 
with straighl cladi. c. Anatriaene. 
d. Oxeote. e. (’.hiaster. 
Fig. 2. Stelletta novae-zealandiae 
nov. spec. a. Dichotriaenes. b. 
Plagotriaene. c Large oxeote of the 
main skeleton. d. Small oxea of 
the cortex. 
distal part of the fibres, the cladome of those outermost placed 
often pierce the dermal-membrane; this latter is sustained by a 
single layer of densely packed oxyasters; small cortical oxea, mainly 
