T. W. Krrx.—On Marine Planarians. 267 
Arr. XXXVI.—On some new Marine Planarians. By T. W. Kier, 
Assistant in the Colonial Museum. 
[Read before the Wellington Philosophical Society, 20th August, 1881.] 
Tue animals comprising this group are exceedingly interesting. They are 
usually thin, soft, and delicate; their varied colours, beautiful leaf-like forms 
and graceful movements render them attractive alike to the naturalist and 
the novice. They are, however, somewhat small, and adhere so closely to 
the sea-weed and stones amongst which they live as to require not only a 
sharp but an experienced eye to detect them. 
Most of the members of this section are furnished with a pair of tentacles. 
In some species these are mere folds or ear-like projections, in others they 
assume the form of true tentacles, situate either occipitally or dorsally. 
The mouth is situate on the under surface, in the median line, but may 
be either sub-central, pre-central, or post-central. 
The ova may often be mistaken for those of nudibranch molluses, being 
usually deposited in flakes on sea-weed, etc. 
It is to be regretted that no preparation has yet been devised for pre- 
serving these animals without destroying the colouring, which is their chief 
beauty. 
The two species now described were obtained in the neighbourhood of 
Wellington, and kept alive for several weeks. The shores of Cook Strait 
and Wellington Harbour appear particularly suited to them, and will, when 
thoroughly examined, probably yield many new and beautiful forms. 
THYSANOZOON. 
Thysanozoon huttont, sp. nov. 
Body oblong, very thin, margin extremely irregular and puckered. 
Upper surface uniform dirty yellow, irregularly blotched with brown, and 
having a broad, chocolate-coloured border. 
Under surface steel grey, bordered with black; a broad, somewhat 
ere of brown extends along the central two-thirds of the median 
Head with two long tentacles of chocolate colour, but tipped with yellow. 
Length, 2 inches. 
Eurylepta herberti, sp. Dov. 
Pane. + & Senco | 
surface pele exeam. colour, with a darker brown median stripe 
|; margin white, with an inner border of bright 
