8 FOSSIL FISHES OF SOUTHERN CALIFORNIA 



Family ROGENIID^. 



3. Rogenio solitudinis Jordan. 

 (Plate II, fig. 1) 



Of this little species, type LVI, Stanford Collections, we have more 

 than thirty specimens, from the white sand-diatomaceous deposits 

 from Soledad Pass, and from the fine sandrock of Moore's Canon. All 

 are in the form of very delicate imprints in the soft white .matrix and 

 none over two inches in length. The depth of body was probably not 

 over six or eight times in the length, not ten as stated in the original 

 account. The head is rather large, in the best preserved examples 

 anteriorly pointed; the lower jaw seems to be the longer, the cleft of 

 the mouth being at least half head. In all, the dorsal and anal are low, 

 about equally developed, opposite each other, the front of the fin being 

 near the middle of the body, the rays of each eight or ten. The caudal 

 is well forked, apparently gephyrocercal, that is, without hypural bones ; 

 the vertebrae slender, hourglass-shaped. We find no trace of pectoral 

 or ventral fin in any specimen. We are unable to assign this genus to 

 any recognized family. The resemblance to COBITOPSIS, suggested in the 

 original description, is probably fallacious. We find nothing nearer, 

 however, and adopt the provisional family of ROGENIID^: for this genus 

 and its possible allies. 



With the type (No. LVI) are many cotypes, all of about the same 

 size. Other groups are LVII, LXXIX, and LXXXI from Soledad, and 

 LXXXVII from Brown's Canon. There are about thirty-five specimens 

 in all, but none show more characters than the original type. In all the 

 head seems to be pointed, the anal is opposite the dorsal, near the middle 

 of the body, and no pectoral nor ventral fin appears. The original figure 

 of the type is here reproduced through the courtesy of Dr. John C. 

 Merriam of the University of California. 



4. Rogenites bowersi Jordan, 3 new genus. 

 (Plate II, fig. 2) 



The little fish (No. LIX, Stanford University) described from the 

 sandy shales of the Miocene age at Brown's Canon, under the name of 

 ROGENIO BOWERSI cannot belong to the genus ROGENIO. 



Its salient characters are the long and slender form, the depth 

 being eight to ten times in the length of the body, the short anal and 

 dorsal very far back, inserted about opposite the 36th vertebra, the 

 anal a shade the shorter and beginning a little farther back. What 

 may be a small ventral fin is well behind the middle of the body, about 

 opposite the 25th vertebra. There is no trace of pectoral fin or caudal, 



3 University of California Publications, Geology, 5, 130, fig. 24. 



