THE CYPKINODONTS. 93 



EAPLOCHILINu^. 

 LUCANIA. 



Lueania Grd., 1859, P. PhU. Ac, 118 ; Blkr., 1860, Cypr., 481,-1863, Atl. Iclith., Ill, 139; Gthr., 

 1866, Cat., VI, 309 ; Jor. & G., 1882, B. 16 U. S. Mus., 342. 



Head and body compressed ; caudal section moderately deep. Head 

 short, crown little arched ; snout short, blunt ; chin steep. Mouth small, 

 narrow. Teeth conical, in a single series in each jaw. Caudal large, other 

 fins small. Dorsal origin near the middle of the length to the caudal, for- 

 ward from that of anal. Anal fin not modified in the male. Scales large, 

 smooth to the touch. Intestine short. 



Differing from the typical Funduli in the compressed anterior half of the 

 body, and especially in having but a single series of teeth in each jaw. The 

 shape of the teeth is similar in the two genera. 



Lueania parva. 



Plate III. Fig. 5, teeth. 



Chjprinodon. parvus Bd., 1855, Ninth Rep., S. I., 345, ext.r. p. 31 ; Blkr., 1860, Cypr., 484 ; Gill, 1861, 

 Cat. N. A. Fish, 51,-1873, Cat. N. A. Fish, 31; Gthr., 1866, Cat., VI, 307; Jor. & C, 1877, B. Buf, 

 Soc, III, 141 ; Jor., 1878, B. U. S. Geol. Surv., IV, 432. 



Limia venusla Grd., 1S59, Mex. Bd., Fish, 71, pi. 39, fig. 20-23. 



Lueania veiiusta Grd., 1859, P. Phil. Ac, 118; Blkr., 1860, Cjpr., 484,-1863, Atl. Ichth.,111, 139; 

 Gthr., 1866, Cat., VI, 310; Jor. & C, 1877, B. Buf. Soc, III, 142 ; Jor., 1878, B. U. S. Geol. Surv., IV. 

 411, 432, — 1887, Rep. U. S. F. Com., 837 ; Jor. & G., 1882, B. 16 U. S. Mas., 343, 893, — 1883, P. 

 U. S. Mus., V, 239, 256; Everm. & K., 1894, B. U. S. F. Com., 1892, pp. 75, 76, 83, 87, 89, 107. 



lueania affinis Grd., 1859, P. Phil. Ac, 118; Blkr., 1860, Cypr., 484; Jor. & C, 1877, B. Buf. Soc, 

 III, 142 ; Jor., 1878, B. U. S. Geol. Surv., IV, 432. 



Lueania parmt Jor. & G., 1882, B. 16 U. S. Mus., 343, 893; Jor., 1885, P. U. S. Mus., VII, 109,— 

 1887, Rep. U. S. F. Com., 837 ; Bean, 1889, B. U. S. F. Com., VII, 129, 132, 148, pi. 2, fig. 18, — 1892, 

 P. U. S. Mus., XIV, 92 ; Hensh., 1891, B. U. S. F. C, IX, 374; Smith, 1892, B. U. S. F. C, X, 68 ; 

 Everm., 1893, B. U. S. F. Com., 1891, p. 87; Everm. & K., 1894, B. U. S. F. Coin., 1892, pp. 83, 92, 

 107, pi. 25, fig. 1. 



B. 6 ; D. 10-12 ; A. 10-11 ; V. 6 ; P. 14 ; LI. 27-30 ; Ltr. 8 ; Vert. 

 14 + 14. 



The arch on either back or belly is not very strong. As compared with 

 species of Fundulus and Zygonectes the amount of compression over the body 

 cavity and forward is quite marked. Depth about two sevenths of the length 

 to the caudal ; caudal region moderately deep. Head about one fourth of the 

 total length, deeper than wide, flattened on the crown. Snout short, blunt, 

 three fourths of the eye ; chin steep. Mouth rather small, lower jaw longer, 



