134 [August, 



situated at the origin of the soft dorsal. A still smaller spine precedes the 

 anal. Ventral spines very much developed, and serrated upon both edges, more 

 minutely, however, belw than above. Caudal posteriorly subcrescentic. Pec- 

 torals rounded posteriorly. 



D I. I. 1. 9. A f. 6. C 2. 1. 5. 5. 1. 1. V I. 1. P 10. 



Ground color yellowish brown, spotted or else transversely banded with grey- 

 ish black ; the spots or bands being formed of crowded dots. Beneath, dull 

 yellow, occasionally dotted. Specimens collected in Four creek, a tributary of 

 Tule lake (San Joaquin Valley), Cal. 



|ATHERINID^. 



Genus ATHERINOPSIS, Girard. 



This genus is intended to include such species of Atherina, in which the palate 

 is unprovided with teeth, having besides a mugiloid fashioned mouth ; the inter- 

 maxillaries constitute its upper arcade, exclusive of the maxillaries, which are 

 situated behind. 



12. Atherinopsis californiensis, G. Specimens measuring seven inches 

 and a half in total length were observed ; the head forming exactly the sixth 

 part of it. The body is very compressed, slender and very graceful. The cau- 

 dal fin is deeply forked ; the base of anal is equal to the length of head ; the 

 base of second dorsal is scarcely half as long as that of anal. Insertion of ven- 

 trals equidistant between the tip of snout and posterior extremity of base of 

 anal fin. Tip of pectorals not reaching the insertion of ventrals. Eye large 

 and subcircular, nearer to the tip of snout of one of its diameter than to the pos- 

 terior edge of opercle. The mouth is quite small. The head above is slightly 

 convex. 



D VI. 1. 10. A 1. 17. C 5. 1. 8. 7. 1. 7. VI. 5. P 13. 



The scales are very large, constituting but thirteen distinct longitudinal rows 

 upon the line of greatest depth of body. They are anteriorly rounded and pos- 

 teriorly truncated, the margin of which, in the latter region, is ornamented by 

 a series of tooth shaped serratures, more conspicuous upon large and somewhat 

 dried specimens. 



Greyish brown above, dull buff beneath the silvery band. Fins unicolor, 

 dull yellowish or greyish. When the scales are removed the upper part of the 

 body is reddish brown; the lower part lighter with a silvery reflection. 



From San Francisco, Cal. 



GOBID^E. 



13. Gobius gracilis, G. About three inches and a quarter in length; the 

 body is slender, compressed and tapering. The head, which partakes of the 

 slender aspect of the body, forms about the fourth part of the whole length. The 

 mouth is very larsje ; its angles corresponding to a vertical line which would 

 pass near the middle of the pupil. The eye is large and elliptical, situated near 

 the summit of the head and its longitudinal diameter comprised a little more 

 ti an four times in the length of side of head. The intevocular space above 

 measures a fifteenth of an inch. The dorsal and anal are rather long. The 

 caudal is posteriorly rounded or else convex upon its margin. Insertion of ven- 

 trals in advance of anterior margin of first dorsal and behind those of pectorals. 



D V. 17. A 13. C 4. 1. 6.5. 1. 5. V 5. P 18. 

 Dull reddish brown ; fins blackish. 

 From San Francisco, Cal. 



EMBIOTOCOID^. 



14. Embiotoca lineata, G. Body elongated, regularly arched on both the 

 dorsal and ventral lines from head to posterior extremities of base of dorsal and 

 anal fins. In specimens eight inches and a half in total length, the head is 

 found to constitute a little less than the fourth of that dimension : the greatest 

 depth, taken upon the middle of abdomen, does not enter three times in the 

 length. The mouth is small ; the posterior extremity of upper maxillary not 



