81G BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



Length to caudal 0.140 



Depth at orbit 0.025 



Depth at first dorsal 0.037 



Depth at second dorsal , 0.034 



Depth of caudal peduncle (?)0.020 



The scales are similar to those of the 21. labracoides. 



MiOPLOSUS BEANI, sp. nOV. 



The most sleucier species of the genus is represented by one specimen, 

 which is the smallest obtained, which is referable to this genus. The 

 depth enters the total length six times, and the depth at the first anal 

 spine enters the length of the vertebral column a little more than four 

 times. Eadii : D. IX— I. 13 ; A. 11—12 ; P. 13. Vertebra} : D. 10 ; 0. 

 15. The general characters are as in M. labracoides, but the scales are 

 not jn^eserved. The form of the head is that of a younger fish, but its 

 proportions as compared with the body are not those of immaturity. 

 The length enters the total 4.2 times, and the orbit enters it 4.5 times. 

 The profile of the front is descending. The teeth of the inferior limb of 

 the preopercle are obtuse and not well defined. There are impressions 

 of seven branchiostegals preserved. 



This perch is named in honor of my friend Dr. T. H. Bean, of the 

 United States Fish Commission. '• 



Measurements. 



Total length 0.131 



Length of head 0.031 



Length to line of first dorsal , 0.040 



Length to line of second dorsal 0.064 



Length to line of anal fin 0.070 



Length to line of caudal fin 0.109 



Depth at orbit 0.020 



Depth at first dorsal ray 0.023 



Depth at first anal ray 0.019 



Depth of caudal peduncle 1 0.011 



Priscacara serrata, gen. et sp. now, Chromididis vel Pomacentridis 

 affinis. 



Char. gen. — This type might be included in the Fomacentridce, but it 

 differs from the genera now known in the possession of vomerine teeth, 

 and apparently in having eight branchiostegal rays. 



In general, Pmcacara may be characterized as P haryngognathi, v^ith 

 ctenoid scales and well-developed spinous rays. The preoperculum is, 

 in the typical species, sharply serrate on both borders. There are three 

 anal spines, and the lateral line is well developed, not extending near 

 the dorsal line. The caudal fin is rounded. The jaws are toothless. 

 The pharyngeal bones, both superior and inferior, are closely studded 

 with short, sessile, conical, teeth ; a row of small ones stands on the ex- 

 ternal border of the inferior pharyngeal. One dorsal fin. 



Char, specif. — Form a regular wide oval, with a subequal contraction 

 at both extremities. The spinous dorsal rays become longer than the 



