VLO low, directly above pelvic origin about one-third the distance from there to the 

 lateral septum. Two VO; the first pair nearly touch the ventral septum just behind the inner 

 pelvic rays; the second pair about two diameters before the anus and one distant from the 

 ventral septum. Three SAO in a wide angle; SAO, about two diameters above and two behind 

 VOj; SAO2 about two diameters above and two behind SAO,, and about over the anus; SAO^ 

 high, on lower edge of the lateral line scale which lies over base of first anal ray; it is distant 

 from SAOj by twice the SAOi.j interspace. A line through the posterior margins of SAO, .2 

 touches the anterior margin of VO^; a line through the anterior margins of SAO., and ■, touches 

 the posterior margin of VO4. On the right side of the paralectotype there are but two SAO, 

 arranged much as in L. rara ; it would appear that SAO, is missing, but there is no evidence of 

 damage. 



AO 6+8, each side (7 + 8 in paralectotype): A0a,.2 interspace about a photophore 

 diameter greater than those of rest of series; this interspace is about half that between the 

 AOa- AOp series. It is noteworthy that the present count of 8 AOp differs from that of 7 as 

 shown by Liitken (1892, fig. 4) and as listed by Taning (1928) when describing the species. The 

 eighth photophore is not readily visible but is definitely present on each side. There is no 

 enlarged space between the AOp and Pre series. Damage to the ventral margin of the posterior 

 part of the peduncle in the paralectotype renders an accurate count of the AOp uncertain, but 

 remaining pits and bits of luminous tissue indicate that 8 photophores were once present. One 

 Pol, a diameter behind a vertical from posterior margin of last AOa and a little over halfway 

 between there and lateral septum, and on the second scale row before a vertical from end of 

 adipose base. Two Pre, low on caudal profile, are separated by about one and one-half diame- 

 ters and are continuous with AOp; the first is well before, the second over, the first procurrent 

 caudal ray; the second is elevated about one diameter above level of the first. 



A large, massive supracaudal gland, beginning at first procurrent caudal ray, occupies 

 three-fourths the distance from there to end of base of adipose fin. This gland extends above the 

 dorsal profile and slightly down along the lateral surface of the peduncle; its width is about 

 one-fourth its length. The paralectotype has a gland of almost identical proportions. 



As in Loweina laiirae, L. rara, and L. terminata, the numbers of photophores of L. inter- 

 rupta may be variable within the i-espective patterns. Maul (1946, p. 26, fig. 9) reported a male 

 (28.5 mm) of L. interrupta, caught alive at night in Funchal Harbor, that had 3 VO, "One close 

 behind ventral base and two close together just before vent, leaving thus a long interval 

 between them and the front one." This specimen also had 5 PO and 4 AOa on the left side, and 

 6 PO and AOa on the right side. 



Tarletonbeania 



Eigenmann and Eigenmann, 1890 



One Pre; 1 Pol. Lateral line undeveloped externally, only the first 2 or 3 scales perforated. 

 Suo present. PO 6-7; VO 5-7; 3 SAO, the series slightly angulate. Caudal luminous glands on 

 males only. 



Key to species of Tarletonbeania 



la. Supracaudal luminous gland of males long, slender, usually filling the supracaudal space; 

 infracaudal gland of males, if present, is short, very weakly developed, and hidden under 

 body scales T. crenularis 



lb. Males with short, bulky luminous glands on both surfaces of caudal peduncle T. taylori 



81 



