FISHES OF HAWAIIAN ISLANDS. 
113 
Color in alcohol, pale reddish brown, marked everywhere with numerous blotches of blackish 
brown edged with a paler brown than the general body-color; between the large dark blotches many 
small spots similarly edged; snout and mandible mottled with dark brown. 
Here described from a specimen (No. 04815) 42 inches long, taken at Honolulu. We have 
also a specimen (No. 04831) 40 inches long, from the same place, and 3 others (Nos. 03706, 03718, and 
03719), 48, 35, and 35 inches long, respectively, from Kailua, Hawaii. 
Ichlhyophis iigrinus Lesson, M6m. Soc. Hist. Nat. Paris, IV, 399, 1829, Borabora, Society Islands. 
Mursenoblenna tigrina, Bleeker, Act. Soc. Sci. Ind. Neeil., II, 1857, 93. 
Gymnomurxna tigrina , Bleeker, Atlas. Ichth., IV, 113, pi. 165, fig. 3, 1864 (Prigi, Java; Nova Selma; Cocos Island; Amboyna; 
Celebes; Timor); Kner, Reise Novara, I, 387, 1867 (Tahiti); Gunther, Cat., VIII, 133, 1870 (Mauritius; Zanzibar; 
East Indies; India); Smith & Swain, Proc. U. S. Nat. Mus. 1882, 121 (Johnston Island). 
Order H LYOPOMI. 
This group, which contains the single family of Halosauridx, is thus defined by Gill: 
Scapular arch constituted by proscapular, postero-temporal and post-temporal, the post-temporal 
discrete from side of cranium and impinging on supraoccipital; hypercoracoid and hypocoracoid 
lamellar; a foramen in upper margin of hypocoracoid; -mesocoracoid absent; actinosts normal; cranium 
with the condyle confined to basioccipital; opercular apparatus characteristic, the preopercle entirely 
detached from the suspensorium (rudimentary and connected only with the lower jaw); operculum 
normally connected, subopercle enlarged and partly usurping the usual position of the preopercle, in 
company with the suborbital chain which is extended backward to the opercular margin; bones of 
jaws, palatines, and pterygoid complete and normal; anterior vertebras separate; ventrals abnormal. 
Family XXXIV. HALOSAURIDX. 
Body elongate, compressed anteriorly, tapering into a very long and slender tail, which becomes 
compressed and narrowed into a sort of filament; abdomen rounded; scales rather small, cycloid, 
deciduous; sides of head scaly; lateral line present, running along the side of the belly, its scales in 
the known species enlarged, each in a pouch of black skin with a luminous organ at its base; no 
barbels; head subconieal, depressed anteriorly, the flattened snout projecting beyond the mouth; 
mouth inferior, horizontal, of moderate size, its anterior margin formed by the premaxillaries, its 
lateral margin by the maxillaries, which are of moderate width; teeth small, in villiform bands, on 
the jaws, the rudimentary palatines and pterygoids, none on vomer and tongue; eye rather large; 
facial bones with large mueiferous cavities; opercular apparatus peculiar, the preopercle entirely 
detached from suspensorium, rudimentary and connected only with lower jaw; opercle normally 
connected ; subopercle enlarged and partly usurping the usual position of the preopercle, in company 
with the suborbital chain, wdiich is extended backward to the opercular margin; bones of head 
unarmed; gills 4, a slit behind the fourth; pseudobranchise none; gillrakers short; gill-membranes 
separate from the isthmus; branchiostegals numerous (about 14); dorsal fin short, rather high, 
inserted behind ventrals and before vent; no adipose fin; no caudal fin; anal fin extremely long, 
extending from vent to tip of tail (its rays about 200 in number) ; ventrals moderate, not very far 
back; pectorals rather long, narrow, inserted high; no axillary scales; shoulder-girdle weak, its 
uppermost bone (supraclavicle or post-temporal) touching the cranium at the nuchal region, but not 
connected with it laterally; air-bladder large, simple; stomach ccecal; pyloric cceca in moderate 
number; intestines short; ovaries not closed; vertebrae very many, 60-j-x. Fishes of the deep sea. 
Genus 61. ALDROVANDIA Goode & Bean. 
Ventrals normal; no second dorsal fin; vertex scaleless; scales of lateral line enlarged, provided 
with photophores; head i pointed snout and prominent lateral ridges; anal moderate, high, its 
Height one-third to one-fou. „n that of dorsal. The 3 Hawaiian species of this genus are fully described 
in Section II. 
Ahlrovandia Goode & Bean, Oceanic Ichth., 132, 1896 ( rostrata ). 
Halosouropsis Collett, Poiss. Hirondelle, 146, pi. V, fig. 23, 1896 ( macrochir ). 
F.C.B.1903— 8 
