PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 49 



of New York. They are in the condition of natural casts in fine-grained 

 sandstone, but I have quite satisfactorily identified a dorsal valve of 

 StricJclandinia salteri and one of B. davidsoni Billings. If these two spe- 

 cies are correctly identified, as they appear to be, their discovery in 

 Georgia is especially interesting, because they have hitherto been found 

 only in strata of the island of Anticosti ; and also of the indication which 

 they and their associates in the two regions named afford as to the 

 equivalency of the Georgia, Clinton, Anticosti strata in America; and 

 Upper Llandovery strata of Great Britain. 

 Washington, D. C., February 15, 1880. 



I>ESCEIE*TION OF A IVE"W FIjOUIVUER (PILEUUOIVICBITHYS VEBTI- 

 CAl^IS), FB©M TEJE COAST ©E CAILIFOKNIA, AVITM NOTES OIV 

 OTJaEK SIPECflES. 



By ©AVI© S. JOKDATV aiiad CIIAB1,ES H. GIIiBERT> 



Pleuronichthys verticalis sj). nov. 



Form broad ovate, the outlines regular; head small, somewhat con- 

 stricted behind the upper eye; eyes large, but smaller than in P. 

 qnadrituhcrculatus. luterorbital ridge narrow; a small tubercle or 

 prominence in front of the upper eye; a large one in front of upper 

 edge of lower; another larger and sharper at interior edge of the in- 

 terocular space ; another at the posterior edge of the interocular spine 

 ridge. This latter is developed into a long, sharp, triangular spine, 

 which is nearly as long as the pupil, and is directed backwards. A 

 prominent tubercle at the posterior lower angle of the upper eye. Upper 

 edge of opercle somewhat uneven, but no other tubercles present. 



IMouth small, as in other species; the lips thick, with lengthwise 

 plicae 



Teeth in a broad band on the left (blind) side of each jaw ; no teeth 

 on the right side in either jaw. Gill-rakers very small, weak, and flex- 

 ible, about ten in number. Scales essentially as in the other species, 

 small, cycloid, imbedded, and scarcely imbricated. Lateral line nearly 

 straight, with an accessory branch which extends to the middle of the 

 dorsal fin. 



Dorsal fin beginning on the blind side at the level of the premaxillary, 

 there being but about four of its rays on the left side of the median line. 

 Vertical fins less elevated than in the other species, the longest rays of 

 the dorsal about half the length of the head. Anal fin preceded by a 

 spine. Caudal peduncle short and deep. Caudal fin elongate, rounded 

 behind. Pectoral short, nearly equal. Yentrals moderate, reaching 

 anal spine. 



Fin rays : D. G5 ; A. 45. 



Color dark olive-brown, Avith round grayish spots, the body and fins 

 mottled with blackish. 



Proc. Nat. Mus. 80 4 jTIay 6, 1 8 80. 



