ESPIANATIOir OB THE PIATES. 667 



Pig. C. Leptogorgia australiensis, var. perjlava, type specimen (dry), 

 reduced to ^ nat. size. C. Portion of main axis of same, 

 from about 4 inches above base, with, origin of three pin- 

 nules, showing the relations of the grooves and verrucse, 

 X 2. c, larger, and c', smaEer fusiform spicules, x 150. 



D. Juneella fragilis. Portion of stem, x 2J. Prom dry speci- 



men from Port Denison, 4 fms. 



E. Muricea tenera, nat. size. E'. Portion of second branch 



on the left, x 4. e. Cortical spicule, x 25. «'. Portion 

 of same spicule, much magnified, to show character of 

 tubercles. From specimen in spirit from Port MoUe, 

 14 fms. 



P. Ptexaura jprcelotiga, var. tijpica. Portion of one of the 

 two main branches, an inch above the point of bifurcation, 

 X 4. Prom dry specimen from Port Curtis, 5-11 fms. 



Plaie XXXVII. 



JFig. A. Spongodes studeri, two terminal lobes, x 2 ; A', portion 

 of lobule, x4: both from specimen in spirit from Port 

 Molle, 14 fbis. a. Id., var. Icevior, long zooid-spioule, 

 X 30, and portion of same, x 90, showing axial cavity 

 occupied by soft material, a'. Cortical spicule of same, 

 X 20, and portion, x 90, showing canals radiating from 

 tubercles to centre, a". Lesser zooid-spioule of same, 

 X 90. The spicules are from a specimen from Arafura Sea. 



B. Mopsella clavigera. Portion, of small specimen, near middle, 



about halfway upwards from base, front view, X 2. Prom 

 dry specimen from Port Curtis, 14 fms. 



C. Melitodes albitincta, type (dry) specimen, seen from front, nat. 



size. C. Pifth bifurcation of main stem of same specimen, 

 X 4. C" & C". Smaller and larger forms of verrucse of 

 same, showing 8 lobes of verruca-waU and 8 tentacular 

 lobes within, x 6. 



D. PsUaedbaria gradllitna. D and D'. Two dry fragments, 



probably from near base of specimen or specimens, x 2. 



