No. 4. — Some Planarians from the Great Barrier Reef of 
Australia. By W. MoM. WoobwoktH, 
Pseudoceros devisii, sp. nov. 
Fig. 1. 
General color, bright orange-yellow, with a broad marginal band of deeper 
orange and a prominent median dorsal ridge along which the pigment is denser 
than over the general surface of the body, though not so deep in color as the 
marginal band. Length, 33 mm.; greatest breadth, 16 mm. From the Brisbane 
River near Brisbane, April, 1896. 
The single specimen of this species, was given to me by Mr. ©, W. de Vis, 
the curator of the Brisbane Museum, in whose honor it is named. The draw- 
ing for the accompanying figure (Fig. 1) was prepared by Dr. A. G. Mayer, 
but unfortunately the specimen was destroyed before it could be preserved, or 
studied in detail. The color and brilliancy of its markings, however, distin- 
guish it from any described species. 
Idioplana australiensis, gen. nov., sp. nov. 
Figs. 2-5. 
General color, bluish to yellowish cream when seen on black background, 
more reddish on white background. Small spots of dark reddish brown uni- 
formly distributed over the dorsal surface except at extreme margin, which 
is free from pigment. Ventral surface without pigment, white. Slightly 
translucent ; pharynx and male organs indistinctly visible, the vasa deferentia 
together with the penis forming a Y-shaped figure (Fig. 2). Expanded ante- 
riorly, with a deep median fold or notch. Anterior or expanded portion pro. 
vided with marginal eye-spots extending backwards to a distance about one 
third the total length of the animal from the anterior end. No marginal eye- 
spots in anterior median notch, Two tentacles, situated about one sixth the 
total length from the anterior end ; anterior faces of tentacles provided with 
eye-spots, and a scattered group of eye-spots over the brain region extending 
as far forwards as a line joining the tentacles (Fig. 3). Length 50 mm.; 
greatest breadth 22 mm. A very sluggish form. Only one specimen, taken 
on the reef at Hope Island, May 12. 
The genus Idioplana differs from other Planoceridæ chiefly as regards the 
sexual organs. The closely approximated sexual openings lie in the anterior 
VOL. XXXII. — NO, 4. 
