Ill 



Named after Mr. B. Peterson, for many years gunner of the Investigator, 

 who in his zeal for zoology, was once nearly wound round the surging-drum of 

 the dredsinsr-winch, and once fell overboard anions' sharks. 



Regd. Nos. 13117, 13118, 5±±* 3 -f 8 . 



87. Macrurus (Macrurus) uasutus, Gtinther. 



Macrurus nasutus, Giinther, Ann Mag. Nat. Hist., 1877, Vol. XX. p. 440: Challenger, Deep-Sea Fishes, p. 132, 

 PI. XXX. fig. B. 



Macrurus brevirostris, Alcock, Ann. Mag. Nat. Hist. (6) IV. 1889, p. 393 ; Journ. As. Soo. Bengal, Vol. LXIII. 

 pt. 2, 1894, p. 127. Illustrations of the Zoology of the Investigator, Fishes, pl. XIII. fig. 3. 



B. 7. D. r+11. A. arc. 110. P. 20-21. V. 10. 



Differs from M. investigatoris only in the following particulars : — 



The head is between a fifth and a sixth of the total. 



The median tubercle of the snout is prominent, but the lateral tubercles are 

 indistinct. 



Major diameter of eye about 3- in the length of the head. 



Outer row of teeth of the upper jaw considerably enlarged. 



Barbel decidedly more than half as long as the eye. 



Scales very closely covered with sharp conical spinelets of equal size, not 

 arranged in rows, some of them projecting beyond the edge of the scale. 



Five and a half or six rows of scales between the last ray of the first dorsal 

 fin and the lateral line. 



2nd dorsal spine a little longer than the head. 



About 35 large long pyloric caeca. 



Largest specimen, 11 inches long. 



Andaman Sea, 490 fathoms : Arabian Sea, off Travancore coast, 738 

 fathoms. 



Regd. Nos. 11762, 13115. 



(In the Indian Museum is also one of the " Challenger " duplicates from 

 Japan). 



88. Macrurus (Macrurus) semiquincunciatus, Alcock. 



Macrurus semiquincunciatus, Alcoek, AnD. Mag. Nat. Hist., Nov. 1889, p. 392 ; Jonrn. As. Soc. Bengal, Vol. 

 LXIII. pt. 2, 1894, p. 127. Illustrations of the Zoology of the Investigator, Fishes, pl. XII. fig. 2. 



B. 7. D. r+11. A. arc. 100. P. 21. V. 11. 

 Differs from M. investigatoris only in the following particulars : — 

 The median tubercle of the snout is not very prominent and the lateral ones 

 are very indistinct. 



