No. 411.) REVIEWS OF RECENT LITERATURE. 225 
though the name “ Rhombus " is properly used only for another type 
of fish). The allies of Xystreurys are, moreover, really intermediate 
between Paralichthys and the Hippoglossine. 
Mr. Kyle has added considerably to our knowledge of the olfactory 
structures of the different groups and to our knowledge of the 
shoulder girdle. His discussion of the origin of the different groups 
is pertinent and sagacious. It is to be hoped that Mr. Kyle will 
continue this line of work, and that he may secure specimens and 
skeletons of the numerous genera which he has not yet examined. 
We may note in passing that the genus Mancopsetta is of Gill. 
DSL 
Gill and Smith on American Moringuoid Eels.— A singular 
group of eels of low structure, and distinguished among other things 
by the extreme shortness of the tail and the backward location of 
the heart, is the family of Moringuidæ. It has been supposed to be 
exclusively East Indian, one species ranging northward as far as the 
Liu-Kiu Islands of Japan. 
Dr. Gill and Dr. H. M. Smith record in Science (June 22, p. 973) 
the discovery of a species of Aphthalmichthys, a genus of this group, 
from a coral reef near San Juan, Puerto Rico. Further study of 
this type shows that the very slender whip-like eels of the West 
Indies, constituting the subfamily Stilbiscinæ, are in fact genuine 
Moringuidæ. Stilbiscus proves to be identical with Moringua. Gor- 
dichthys must belong to the same group and probably Neoconger 
also, thus giving four genera in America, as compared with the three 
(Moringua, Raitaboura, and Aphthalmichthys) found in the East 
Indies. The family is thus almost as well represented in the West 
Indies as in the East. All the American species are very rare. 
The species from Puerto Rico is to be described as Aphthalmichthy 
caribbeus Gill and Smith. D. 5.1]. 
Transplanting of California Trout. — Students of trout in Cali- 
fornia have noticed a number of anomalies in the distribution of the 
different forms. The writer has been interested in following these 
out, and now wishes to place on record for the reference of future 
naturalists the facts in regard to them. If the investigation had 
been delayed a few years until the clues were lost, these cases would 
be altogether inexplicable. 
In the tributaries of Feather River, around Prattsville in Plumas 
County, is found the Lake Tahoe trout, Sa/mo henshawi. I learn 
