ART. 10 



NOTES ON MYCrOPHINE FISHES PARR 



43 



the entire snout anterior to the eyes and meeting each other at the 

 median ethmoidal crest, as shown in the previously rendered diagram 

 of the frontal view of this species. (Parr, 1928, fig. 30, 6, p. 140.) 

 There is a small supraorbital organ between the upper posterior 

 part of the fused antorbitals and the anterodorsal margin of the 

 eye, in close contact with but quite distinct from the former organ. 

 FLO nearer to the base of pectoral fin than to the lateral line. The 

 two PYO in a straight series with the anterior PO. Fourth PO ele- 

 vated approximately to the level of the upper PVO. VLO about 

 midway between the lateral line and the base of ventral fin. Prob- 

 ably 5 VO, but the fourth is missing in the type specimen. Second 

 and third VO elevated in a straight series with the first VO. 3 

 SAO in a very steep, practically straight line, the continuation of 

 which passes well behind the last VO. Interspace between lower 

 and middle SAO much smaller than that between the middle and 

 upper organs. The anteroanals are arranged in an equally curved, 



Figure 20. — Diaphus effulgens Goode and Beax 



semicircular series which can be continued anteriorly to include the 

 upper SAO and posteriorly to the Pol. 6 anteroanal organs are 

 found in the type, but a somewhat increased interspace between the 

 fourth and the fifth indicate the probability of another organ having 

 been present in the undamaged specimen. Pol and upper SAO well 

 below the lateral line (about two-thirds of their own diameters re- 

 moved from the latter), their distances from the nearest AO ant. 

 considerably larger than the interspaces between the anteroanal or- 

 gans themselves. 5 posteroanals in a straight series beginning en- 

 tirely behind the base of anal fin. 4 Pre, equally spaced and curved, 

 with the upper organ well below the end of the lateral line. 



Total length without caudal fin 118 mm. Proportions in per cent 

 of the total length without caudal fin : Length of head 31. Diameter 

 of eye 10.6. Length of lower jaw 19. Greatest height 23. Greatest 

 vertical height of the snout anterior to the eyes 12. Distance from 

 snout to ventral fin 47. Distance from snout to dorsal fin 43. Dis- 

 tance from snout to anal fin 65. 



