QILESITA 43 



ADDENDUM 



Family DUSSUMIERIIDJE 



We may here insert two fossil species just received as these pages 

 pass through the press. 



Quaesita alhambrae Jordan and Gilbert. 

 (Plate XXVIII) 



Type No. 198. A minute fish but three-fourths of an inch long, from 

 a Miocene outcrop of diatomaceous shale near Alhambra, Los Angeles 

 County, California, presented by Mr. George E. Malcolm. The head, 

 dorsal fin and spinal column are fairly preserved. 



Body fusiform, elongate. General shape of QU^SITA, rather heavier 

 at the nape, decreasing rather rapidly backward. Head large, 2.6 in 

 length to base of caudal, its depth 4y 2 times in length, depth at nape 

 about 5 in length of body; eye obliterated, the interorbital shelf strong; 

 mouth rather short, oblique, the lower jaw projecting, reaching front of 

 orbit; maxillary about 4^ in head; no teeth evident; opercle rounded, 

 with five or six strong striae, radiating from above; preopercle narrow; 

 cheeks broad. 



Vertebrae large, about 30 in all, the number uncertain, as in part 

 they are rather vaguely defined; each is apparently deeper than long, 

 their strength well maintained backward; the vertebrae are peculiarly 

 formed, looking like a succession of cross-plates, each crossed by a me- 

 dian notch ; neurals and haemals obliterated ; ribs slender ; no trace of 

 interneurals ; hypural plate obliterated ; caudal split, widely forked, its 

 lobes 4 in length of body; % in head; about 16 rays in each lobe, the 

 lobes acuminate. Dorsal inserted just behind middle of body, opposite 

 twelfth vertebra, 6 to 8 rays visible; trace of ventrals just below it; anal 

 mostly obliterated, with traces of about 12 rays. No scales preserved. 

 This fish seems allied to QILESITA and other genera referred to the 

 DUSSUMIERIID.E, but the large vertebrae, deeper than long and less than 

 35 in number, may distinguish it generically from all the other fishes of 

 this group. For the present we treat it as a second species of QILESITA. 



Quaesita fragilis Jordan and Gilbert, new species. 



Type No. 110, a small ^fish, one and a half inches long, from the San 

 Pedro Hills, one mile west of "Wilmington Road" station on Pacific Elec- 

 tric Railway from Los Angeles to San Pedro. 



Head 2% in length, depth at dorsal 5% times in length, eye 3% in 



