FISHES-EMBIOTOCOIDAE—APPENDIX. 
205 
APPENDIX TO THE EMBIOTOCOIDS. 
In June, 1854, appeared a paper by Dr. Gibbons, of San Francisco, California, entitled 
“ Description of Four New Species of Viviparous Fishes, from Sacramento River and the Bay 
of San Francisco,” which was soon followed by another, under the title of “Description of 
New Species of Viviparous Marine and Fresh-water Fishes, from the Bay of San Francisco, and 
from the River and Lagoons of the Sacramento.”* The following genera and species are 
referred to: 
Holconotus agassizii, 
Holconotus gibbonsii, 
Holconotus fuliginosus, 
Hysterocarpus traskii, 
Micrometrus aggregatus, 
Micrometrus minimus, 
Cymatogaster larkinsii, 
Cymatogaster pulchellus, 
Cymatogaster ellipticus, 
Hyperprosopon argenteus, 
Hyperprosopon arcuatus, 
Mytilophagus fasciatus, 
Pachylabrus variegatus. 
Neither of the above papers had come to my knowledge at the time I wrote the first descrip¬ 
tions of the species illustrated in the foregoing monograph. In my subsequent researches upon 
the fishes of this curious family, I have endeavored to identify the species thus named by Dr. 
Gibbons, and it is much to my regret that the task has proved too ungrateful. There is no 
possibility to arrive at a truthful conclusion, unless Dr. Gibbons himself should take the trouble 
to label a series of specimens of such species as he has described, and send them to the Smith¬ 
sonian Institution for ulterior comparison. 
There being but one species inhabiting the fresh waters of the Sacramento river, and 
having had specimens of the same, I have referred them to Hysterocarpus traskii. 
No doubt that several of the marine species will prove identical with those described by Prof. 
Agassiz, as well as by myself. 
Proceedings of the Academy of Natural Sciences of Philadelphia, VII, 1854, 105 and 122, 
