principally marine, found on the South Coast of Devonshire. 25 
This curious animal was kept alive in sea water several days, 
for examination, and was never observed to take in or eject 
that element like the Holothuria tribe, but at the posterior end 
is an evident opening for discharge of the feces. | 
It can scarcely admit of a doubt but that this is the animal 
figured by Pallas, though so badly represented. By this author 
we learn that it was originally found on the coast of Cornwall 
amongst the submarine rocks, and communicated to him by 
Gertner under the title of Thalassema Neptuni, intending, it is 
presumed, Thalassina as expressive of its nature. 
The present subject was taken in a similar situation on the 
coast of Devon ; and as it evidently is not belonging to the genus 
Lumbricus, nor to any other established genus in Helminthology, 
it has been thought right to give it a distinct place in the system 
of Nature, and I thinkit might with propriety immediately precede 
Holothuria. Mer 
PLANARIA vrTTATA *. 
Lis v. 217. X 
Body ovate, yellow, the margin edged with white, and marked 
with concentric, broken lines of black ; in the middle a broad 
white longitudinal line, with a central black one: in the front are 
two auricular appendages, each marked with a black patch on the 
hinder part: at a small distance behind the auricles, at the com- 
mencement of the dorsal white line, are two contiguous patches 
consisting of numerous minute black spots, appearing perfectly 
distinct under a lens, and which are probably eyes. 
The white part in the middle is somewhat convex, and seems 
to be what contains the viscera; the rest is extremel y thin. 
Length when extended an inch and a half; breadth one inch. 
This extremely beautiful marine Planaria has a slow and gliding 
motion, the margins undulating into raised scallops. 
* This seems allied to the Doris quadrilineata Linn, Gmel, p.3104, 6, G. Saw. 
VOL. XI. : E Two 
