GILBERT: CERTAIN SCOPELIDS IX THE MUSEUM COLLECTION. 259 



Supraventral over the posterior half of ventral base, midway between lateral 

 line and ventral fin. 



Ventral photophores, 5, the first three pairs forming strongly diverging 

 lines, the first interspace a little shorter than the second, the third pair a little 

 in advance of the vertical from the fourth ; fourth and fifth pairs near median 

 line, as usual. 



Snpra-anals not angulated, or with the middle very slightly in advance of a 

 line joining the other two, the upper in contact with the lateral line ; lower 

 interspace much shorter than upper. 



Antero-anals, 7, the first elevated above and a little anterior to the second ; 

 the second to the sixth nearly parallel with anal base, the seventh again 

 elevated, but less so than the first, inserted well behind a line joining sixth 

 with posterolateral. 



Posterolateral in contact with the lateral line, but little behind seventh 

 antero-anal, well in advance of last anal ray. 



Postero-anals, 5. Precaudals, 4, the first three evenly spaced, forming a 

 curve, the fourth more distant, but little below lateral line. 



Three cotypes from the same locality show no variation in the number and 

 distribution of the photophores. 



The species is named for Mr. Samuel Garmau of the Museum of Com- 

 parative Zoology. 



Myctophum pristilepis (Gilbert and Cramer). 

 Plate 3. 



Dasyscopelus pristilepis Gilbert and Cramer, Proc. U. S. Nat. Mas., 1897, 19, 

 p. 412, pi. 39, fig. 1. Gilbert, Bull. U. S. Fisli Com., 1905, 23, pt. 2, p. 600. 



A specimen, 75 mm. long, collected near the Island of Mauritius by 

 Mr. Nicholas Pike, extends the range of this species from the Hawaiian 

 Islands to the western shores of the Indian Ocean. 



The specimen is somewhat larger tlian those hitherto reported and 

 exhibits the noticeable increase in the size of the eye which in this 

 group accompanies growth. A specimen from the Hawaiian Islands 

 30 mm. long to base of caudal has the eye 12 hundredths of this length ; 

 another from the same locality 52 nmi. long has the eye 13 hundredths ; 

 in the Mauritian specimen 67 mm. long to base of caudal the eye is 

 13.5 hundredths. In smaller examples, the diameter of the eye is less 

 than the postocular length of the head ; in adults, it exceeds the post- 

 ocular length and is 48 hundredths of the total length of the head. 



In the young of this species, the scales have entire margins, a speci- 

 men 35 ram. long showing no trace of marginal spines on the scales of 

 the lateral line and on such others as are present. In the Mauritian 



