be found, however desirable, for each of them, I have 
therefore named the one now figured after Colonel Birch 
whose labours in search of the bones of the Ichthyosaurus 
have been crowned with success, and whose generous 
method of disposing of his collection will long be remem- 
bered. The species from Havre I propose to call biarma- 
tus , in allusion to the A , armatus, tab. 95, which has but 
one row of spines. The figure is taken from a specimen 
obtained at Lyme in Dorsetshire, by Colonel Birch, who 
kindly lent it me previous to his sale. I have it less per- 
fect imbedded in a scull of the Ichthyosaurus from Char- 
mouth ; and small from Cray mouth, by favour of my 
esteemed friend James Brodie, Esq. There is often 
much pyrites in the solid parts of the casts that gives 
them a pretty metallic surface, the same circumstance is 
observable in the Am. biarmatus. 
