1909. 1 R. E. Lloyd : Deep-Sea Fish caught by the “ Investigator 149 
1. The premaxillary teeth are fewer in number and are relatively larger; they 
are arranged in two sets, an anterior closely set group of eight or nine, and a pos- 
terior group of three with wide intervals between. 
2. The interorbital space is wider than half the diameter of the eye. 
3. The head is covered with a firm smooth skin just as in /I. phosphorops, but 
in the new species the colour of this skin is a dark slaty blue. The colour of the rest 
of the body is brownish black. The bases of the fins have a blue tinge. The blue 
colour is partially preserved in spirit. 
4. The total height is only | of the total length excluding the caudal fin. 
One specimen, 18 cm. long, from 1,005 fathoms in the Gulf of Oman. Station 354. 
Registered No. 
Narcetes affinis, Lloyd. 
Ann. Mag. Nat. Hist. (7), vol. xviii, p. 308 (1906) ; Illustr. Zool. Investigator Fishes, 
plate xlii, figs, i, la (1908). 
B. 7, A. 14, D. 17, V. 10, P. 13, L.l. 73. E.tr. 9-1-13. 
Resembles N . pluriserialis (Garman), and differs from N . erimelas (Alcock) in the 
following particulars : — 
1. There are seven branchiostegal rays. 
2. The first ray of the anal fin is vertically below the eighth ray of the dorsal. 
3. There is one enlarged tooth on either side of the vomer. 
In all its proportions this species resembles N . pluriserialis very closely. 
It differs from N . pluriserialis in the following respects : — 
The teeth in the maxillæ are in two series, an outer series of small teeth and an 
inner series of larger ones. 
There are only seventy-three scales in the lateral line. 
The scales of the lateral line are large, measuring as much as \ inch in length. 
The total length of the single specimen is 14 inches. 
In the middle and hinder parts of the fish, one inch of the latéral line contains 
six scales, but in the front these scales overlap one another to a much further extent, 
so that one inch contains eight or nine scales. 
In the anterior half of each scale of the lateral line is the wide opening of its 
tube ; the margin of this opening is completed in front by a semicircular notch in the 
hinder edge of the scale which lies next in front. 
Colour almost black ; head and lining of gill jet-black. 
One specimen, 14 inches long, from 1,005 fathoms in the Gulf of Oman. Station 
354 - 
It is notable that N. pluriserialis (Garni.), which this species resembles in many 
ways, came from 1,010 fathoms in the Gulf of Panama. Registered No. 
