14 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 52 



(Leptolepis coryphcenoides Bronn, L. broiini Agassiz) has but 40. 

 In Leptolepis dnhius (subgenus Tharsis) the number is 50. 



The name Tharrhias, equivalent to Tharsis (ddpa-o^, 6a.ppo<;, cour- 

 age, boldness), is suggested for the Brazilian fish. 



In Tharrhias, as in Leptolepis, the dorsal is inserted slightly 

 before the ventrals. 



3. THARRHIAS ARARIPIS Jordan and Branner, new species 



Type No. 4, Rocha Collection, in Counterpart. PtATE II 



Head about 3f in length to base of caudal ; opercle large, with 

 radiating striae ; nearly ^ deeper than long ; subopercle small, its 

 depth not more than one- fourth that of the opercle, the suture hori- 

 zontal ; depth of opercle i§ in distance from gill opening to dorsal; 



Fig. 8. — Tharrhias araripis Jordan & Branner. 

 Barra do Jardini, Brazil. Restored. 



preopercle with its upright limb nearly vertical ; two bones behind 

 eye and bone on cheek traceable, but the form not clearly made out 

 (jaws and front of head destroyed). 



Dorsal fin with strong interneural bones, its insertion behind gill 

 opening nearly equal to length of head and greater than depth of 

 body, which is about 43- times in length to base of caudal ; dorsal 

 short, higher than long, about 12 rays traceable; ventrals about 

 under middle of dorsal ; anal inserted behind dorsal at a distance 

 greater than depth of body and about equal to length of head ; the fin 

 smaller than the dorsal, of about 9 rays, the first longest, as in the 

 dorsal. A^ertebrse about 55, the last five small and turned upward; 

 caudal apparently forked, the upper lobe perhaps the longer. 



Scales rather small, very thin, even, diamond-shaped along back, 

 those below obscurely shown, but apparently rounded ; no enamel on 

 scales or ganoin ; no trace of lateral line or of scaly sheaths. Scales 

 about 56-19, 18 in a longitudinal row before dorsal; those at base of 

 upper lobe of caudal smaller and more distinctly rhombic. 



