FISHES. MCCULLOCH. 165 



Described and figured from an example 182 mm. long 

 without the caudal fin. It is the smallest of fourteen 

 specimens, but is in a better state of preservation than 

 I;irgvr examples. 



Variation. Fourteen specimens, 182-266 mm. long 

 without the caudal fin, exhibit similar variation in their 

 proportions and number of fin-rays to that noted by 

 Koule (Bull. Mus. Hist. Nat. 1915, 2, p. 42) in 

 Aleposomus socialix. A tabulation of the measurements 

 of the fourteen specimens shows that they vary 

 individually and irrespective of size. D. 19-21, A. 16-19, 

 P.7-9, V.7-8. Head 3-74-1 in the length to the base of the 

 tail; depth 5-7-6-4 in the same. Eye 3-8-4-2 in the head; 

 orbit 3-0-3-3 in the same. Snout 1-6-1-8 in the orbital 

 diameter. 



* 



Idcnti /.(/. These specimens do not quite agree with 

 the proportions of R. squantilaterxs, but having tabulated 

 their range of variation, and allowing for the fact that 

 Alcock's description and figure were prepared from a 

 single young example, I consider the differences too 

 slight to be of specific value. 



Locality. All the specimens were trawled together 

 in the Great Australian Bight, south from Eucla, 350-450 

 fathoms: 14th May, 1913. 



Family (iOXOSTOMID^E. 



A. A single row of photophores on each side of the abdomen; 

 dorsal originating opposite anterior portion of anal. 



Bonapartia. 

 AA. Two or more rows of photophores on each side. 



B. Two rows of photophores on each side of the abdomen. 



C. Dorsal fin originating opposite anterior portion 



of anal. 



Gonostoma, Neostoma, Cyclothone, Valenciennellus. 

 CC. Dorsal originating well in advance of anal fin. 

 D. Dorsal origin before that of the ventrals; 

 anal short with 14-15 rays. 



Ichthyococcus. 

 DD. Dorsal origin over or behind that of the 



ventrals. 

 E. No adipose dorsal fin. 



F. Anal fin long, with 29-33 rays. 



Manducus. Yarella. 

 EE. Adipose dorsal present. 



G. Anal fin short, with 14-15 rays. 



Vinciguerria. 



