FISHES EMBIOTOCOIDAE APPENDIX. 205 



APPENDIX TO THE EMBIOTOCOIDS. 



In June, 1854, appeared a paper by Dr. Gibbons, of San Francisco, California, entitled 

 &quot; Description of Four New Species of Viviparous Fishes, from Sacramento Kiver and the Bay 

 of San Francisco,&quot; which was soon followed by another, under the title of &quot; Description of 

 New Species of Viviparous Marine and Fresh-water Fishes,, from the Bay of San Francisco, and 

 from the Eiver and Lagoons of the Sacramento.&quot; * The following genera and species are 

 referred to : 



Holconotus agassizii, Cymatogaster larkinsii, 



Holconotus gibbonsii, Cymatogaster pulchellus, 



Holconotus fuliginosus, Cymatogaster ellipticus, 



Hysterocarpus traskii, Hyperprosopon argenteus, 



Micrometrus aggregatus, Hyperprosopon arcuatus, 



Micrometrus minimus, 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. 



