136 



[June, 



GOBIUS NEWBERRTI 



is a small and very gi-aceful species of Goby, hitherto undescribed. The average 

 size of many specimens observed is about two inches or less, the head forming 

 the fourth of the total length. The first dorsal is contiguous to the second at 

 its base, and is considerably lower than the latter. The mouth is deeply cleft, 

 the posterior extremity of the maxillary extending to a vertical line passing 

 posteriorly to the orbit. The origin of the anal is situated a little behind the 

 anterior margin of the second dorsal : both fins terminate evenly, as far as con- 

 cerns the tips of the posterior rays. The caudal forms the fifth of the total 

 length. The ground color is olivaceous, but the upper regions appear blackish 

 with isolated spots of the ground color ; the inferior regions are unicolor. 

 Atherina storeri, Ayres, is my Atherinopsis californiensis. 



Rhacocheilus toxotes, Agass., was identified on a specimen collected by E. 

 Samuels in Tomales Bay. 



Hysterocarpus traskii. Gibbons, could be recognized on a specimen collected 

 at Fort Reading by Drs. J. F. Hammond and John S. Newberry. Another speci- 

 men from the same locality had no irregular transverse bands of black, but was 

 almost unicolor. 



Another species of viviparous fish, 



Embiotoca argyrosoma, 

 is easily distinguished from its congener by the brilliant argentine tint of its 

 entire body, though made a little darker along the dorsal region by a greyish or 

 pinkish hue. The general form is elongated; the head rather small, subconical, 

 rounded anteriorly, and contained four times and a half in the total length. 

 The caudal is deeply forked. The posterior extremity of the anal extends a 

 little more posteriorly than the dorsal. The tips of the pectorals reach a ver- 

 tical line passing beyond the origin of the anal. Specimens were collected at 

 San Francisco, Cal., by Lt. W. P. Trowbridge, U. S. A. 



Osmerus elongatus, Ayres, has been collected at San Francisco, Cal., by Dr. 

 John S. Newberry. The specimens were identified by Dr. Ayres. 



A most important (I was almost goingto say unexpected) discovery of a white 

 fish was made by the party on the R. R. Survey of California and Oregon, com- 

 manded by Lt. R. S. Williamson. And since it is different from its hitherto 

 known congener, we will call it 



COREGONUS WILLIAMSONI, 



as commemorative of that Survey. Its head is rather small, being contained 

 about five times in the total length, which measures eleven inches. The mouth 

 is very small and the posterior extremity of the maxillary does not extend as far 

 back as the anterior rim of the orbit. The scales are large ; eighteen rows of 

 them may be counted between the anterior margin of the dorsal and the inser- 

 tion of the ventrals : nine above the lateral line, and eight below it. The lateral 

 line, itself, is perfectly straight. The caudal fin forked as usual. The pectorals 

 are rather small. I have alluded to the color in saying it was a white fish ; add 

 to it a bluish grey hue along the back. It was collected by Dr. Newberry in 

 the Des Chutes river, a tributary of the Columbia. 



In adding a second species to the genus Platichthys, the diagnose of this 

 genus must be modified so as to read : " eyes on either the right or left side," 

 for 



Platichthys umbrosus, 

 which is the new species referred to, hag its eyes on the right, whilst in the 

 species formerly described, they are on the left. It can also readily be distin- 

 guished from its congener in having the body completely covered with scales, 

 on the surface of some of which prickles or asperities are observed. The speci- 

 men before us measures seven inches and a half, is of a uniform blackish brown 

 hue on the right side and light brown on the left. It was collected by Lt. W. 

 P. Trowbridge, U. S. A., at Cape Flattery, W. T. 



