gilbert: the lantern-fishes of japan 



77 



with that determined for the seas about the Hawaiian Islands (Gilbert, Deep 

 Sea Fishes, Hawaiian Islands, 1905, p. 596; M. margaritatum = M. affine). The 

 total number in both series ranges from 14 to 16 (in Hawaii from 13 to 17), the 

 antero-anals ranging from 8 to 10, the postero-anals from 5 to 7. Listing sepa- 

 rately the two sides of the 17 individuals: 



Antero-anals — 8 occur in 5 cases, Postero-anals— 5 occur in 2 cases, 

 9 occur in 27 cases, 6 occur in 28 cases, 



10 occur in 2 cases. 7 occur in 4 cases. 



The following combinations occur: 



8 + 6 in 3 cases, 9 + 6 in 23 cases, 



8 + 7 in 2 cases, 9 + 7 in 2 cases, 



9 + 5 in 2 cases, 10 + 6 in 2 cases. 



Twelve of the seventeen specimens were bilaterally symmetrical, the other 

 five varying on the two sides by one photophore in either the anterior or the 

 posterior group. 



In a small collection ranging from the latitude of the Hawaiian Islands to 

 the equator, reported on by the writer (Mem. Mus. Comp. Zool., XXVI, 1908, 

 p. 217), a tendency seemed apparent toward a reduction southward in the 

 number of the photophores of the anal series. More material from this region 

 and that south of the equator is highly desirable. 



List of Stations. 



4921. 30° 23' 30" N., 129° 36' 30" E. Surface. 



4927. 29° 57' 00" N., 130° 41' 00" E. Surface. 



4978. 33° 57' 45" N., 135° 56' 00" E. Surface. 



5052. 37° 57' 45" N., 142° 04' 00" E. Surface. 



6. Myctophum laternatum Garman. 

 Mydophum laternatum Garman, Mem. Mus. Comp. Zool, Vol. XXIV, 1899, 



p. 267, PL 56, fig. 1 ; west coast Central America, Gulf of California. 



This diminutive species was recorded by Garman from the Gulf of Cali- 

 fornia and the coast of Panama, and by Brauer from the west coast of Africa 

 and from various localities in the Indian Ocean. Four specimens were taken by 

 the "Albatross" near Nagasaki, in intermediate nets at 300 fathoms (Stations: 

 4909, 31° 28' 30" N., 129° 27' 30" E.; 4920, 30° 34' N., 129° 22' E.). The 



