BY ALEX. MORTON. 213 
the posterior margin rounded; the lower lobe is triangular, 
with the anterior margin slightly concave, and equal in 
length to the posterior margin, which is sinuous, with the 
angle rounded. The skin is covered with small rough scales, 
each of which bears a well developed spinate projection, 
which consists of a central spine from which radiate four 
compressed wings, each one terminating at its outer angle in 
a somewhat shorter spine than the central one. 
Colouwr.—Uniform sandy brown. Type specimen in the 
Tasmanian Museum, Hobart. 
