672 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
ANALYSIS OF THE SPECIES OF SYNAPIIOBRANCHUS. 
a. Dorsal fin beginning l to £ bead’s length behind vent ; maxillary reaching a point 
almost opposite gill-opening ; head 3 to 34 in distance from tip of snout to dorsal, 
£ to £ in trunk; snout 3| in head ; eye 2 to 2\ in snout ; cleft of mouth G to 1£ 
in head ; pectorals 3 in head, their insertion about equidistant from snout and 
anus. Uniform brown, vertical fins darker behind, light-edged anteriorly ; inside 
of mouth blue-black; gill-openings dark Pinnatus, 126. 
126. SYNAPHOBRANCHUS PINNATUS. 
Murcena pinnata Gronow, Cat. Fish. Brit. Mus., 19, 1854 (habitat unknown). 
Synaphobranchus pinnatus Gunther, viii, 23, 1870 (Madeira) ; Goode and Bean, Bull. 
Essex Inst., 26, 1879 (Offshore Banks, 200 to 300 fathoms) ; Bean, Proc. U.S. 
Nat. Mus., 113, 18~0 (list of localities) ; Goode, ibid., 485; Goode & Bean, 
Bull. Mus. Comp. Zool., 222, 1883; Jordan and Gilbert, Syn. Fish. N. A., 364, 
1883; Gunther, Voy. Challenger, xxn, 253, 1887 (Maderia; Brazil; Japan; 
^Phillipine Islands, etc.); Vaillant, Expdd. Travailleur and Talisman, 89, 
1888 (Morocco ; Canaries ; Soudan; Cape Verde Islands; Azores; Arguina). 
Synaphobranchus lcaupii Johnson, Proc. Zool. Soc. Lond., 169, 1862 (Madeira) ( fide Gun- 
ther). 
Synaphobranchus affinis Gunther, Ann. and Mag. Nat. Hist., 445, 1877 (Inosima, Japan). 
Habitat : Deep waters of the north Atlantic and Pacific. 
Etymology : Latin, pinnate. 
The species is not rare in the deep waters of the north Atlantic, es- 
pecially off the Newfoundland Banks. The form found in the north 
Pacific, Synaphobranchus affinis , is now regarded by Dr. Giinther as 
identical with the Atlantic species. 
Our specimens of Synaphobranchus pinnatus are from the Grand 
Banks of Newfoundland. 
Genus 48. — HISTIOBRANCHUS. 
Histiobranchus Gill, Proc. U. S. Nat, Mus., 255, 1883 ( inf emails ). 
Type : Histiobranchus inf emails Gill. 
Etymology : ” Igtlov, sail, i. e., dorsal fin; ftpdyyca, gills, from the inser- 
tion of the dorsal. 
This genus is close to the preceding, from which it is distinguished 
by the insertion of its dorsal. Two species have been described, per- 
haps identical with each other. 
ANALYSIS OF THE SPECIES OF HISTIOBRANCHUS. 
a. [Pectoral fin longer than snout ; eye 4 or £ of the length of snout ; head and trunk 
1£ in tail ; dorsal commencing above or immediately behind the pectoral, which 
is only £ the length of head; scales quite rudimentary, lanceolate, imbedded in 
the skin; cheeks naked; dorsal and anal fins low, especially the former ; uni- 
formly black.] (Gunther) Bathybius, 127. 
aa. [Pectorals considerably shorter than snout; dorsal commencing a little behind 
root of pectoral, ^ of length, while the anal arises not much nearer the snout 
than the end of tail ; color black.] m (Gill) .... Infern alis, 128. 
