370 O. C. Marsh on the Metamorphosis of 
has but very rarely been met with, it may be well to mention 
some of the more important characters noticed in the individe- 
als just described, in addition to those given in the original de 
scription of the two forms, when the connection between them 
was unknown. It should, perhaps, be first stated that, afte 
Prof. Baird under the name Stredon melanosticta, which & 
possibly only a variety of S. lichenoides.t The coloration, the 
regular outline of the membranes, the rounded extremities of 
the branchial processes, as well as the arrangement of the pali- 
tine teeth, all indicate that the animal figured had already 
tered upon the preliminary stages of metamorphosis. Ine 
of these cases, however, it is not improbable that the alterat® 
may have been temporarily, or possibly even permanently, a. : 
pended, before the animal was captured. Aside from part 
tures which may be the result of partial transformation, Prif 
redons from Lake Como do not differ essentially from + ee 
Baird’s original figures of S. lichenoides, except in having® — 
somewhat broader head, and in not having the dorsal a 
extend to the occiput, differences which may be due bout 0 
locality, as the type specimen came from a point abou © — 
miles farther south. stated, 
The Siredons obtained at’ Lake Como, as already sii , 
were from five to ten inches in length. The color nile the 
is a very dark olive above, and a light olive below, ¥ black 
fimbrie of the external branchie are nearly or Ligh ~. 
On either side of the body are twelve costal grooves, . 
cluding the inguinal. The skin is smooth and 7 
and shows beneath it the ends of innumerable giants hol thes 
crowded together, In specimens preserved in The 
glands project, making the surface appear granules base 
sal membrane commences a short distance from “ extend 
the head, and both this and the lower membrane ©" 
* Stanbury’s E . to the ¢ e, p. 336, 1855. + part 2B 
: e Pacific & Relieeea Rice ee ee ae 1, and vol. sis , 
