12 THE FISHES OF THE < INGOLF > EXPEDITIONS. 



Torino, t. XVIII, p. 187; Vaillant: Recherches scientifiques etc. p. 325, pi- 27, fig. 2 ). Further an 

 Australian species (N. scxspinis Richardson, « Voyage of H. M. ships Erebus and Terror , Fishes p. 54, 

 pi. 32, fig. 4 — 11; described and figured again in Gxinther's < Report on deep-sea fishes (Challenger) 

 p. 243, pi. 60, fig. 9 — 15 and pi. 61, fig. A). Then, in deeper water on the eastern side of North America 

 were found 2 species: N. aiialis (Gill: Proceedings United States National Museum, VI (1883, p. 255) 

 and N. fhasganorus (Goode: Proc. Un. St. Nat Museum, III (1881), p. 435, Oceanic Ichthyology* p. 167, 

 fig. 186). The question did now arise, if the individual or specific variation had not been supposed to 

 be larger than it is in reality, and if not one or some of the arctic .specimens enumerated above could 

 be referred to the species established by the American authors. L,eon Vaillant has expressed the 

 oijinion that the Icelandic specimens from « la Recherche could be referred to iV. phasgaiwrus Goode. 

 My own earlier studies of the material at hand or described elsewhere induced me to conclude that 

 the then known Icelandic or Greenlandian specimens should be determined as ^V. iiasiis. According 

 to Mr. Bean and Goode (Oceanic Ichthyology p. 166) N. Boiiapartii and N. mcditcn-aiints should 

 not be different, but some authors are of the opinion, that the species from the westcoast of South 

 America designated with one of these names [N. Bonaparfii, Giinthers Report etc. p. 249, tab. 61, 

 fig. C) is a proper species and genus, now termed GiglioUa Moselcyi (-Oceanic Ichthyology ■> p. 169, 

 fig. 187, 193). 



To quite another type belongs a Nofacauf/iiis of the subgenus PolyacaiitJionotus Gthr. and of 

 the particiilar subdivision termed Macdoiialdia^ brought home by «Ingolf s expedition in 1895. The 

 species has already been described twice by Collett (Diagnoses de poissons nouveaux provenant 

 des campagnes de rHirondelle» : Bulletin de la Societe zoologique, 1883, V-}P1\ ^'^^1 Resultats des 

 campagnes scientifiques par Albert V' , prince souverain de Monaco, pars X, Poissons provenant des 

 campagnes du yacht THirondelles, 1896, p. 48, pi. 5, fig. 21) and h\ Brown Goode & Tarleton Bean 

 (A revision of the order Heferoiiii, deep-sea fishes, with a description of the new generic types Mac- 

 do7ialdia and Lipogenys, Proc. Unit. Stat. National Museum t. 17 (1894), p. 455, pi. 18, fig. 2; «Oceanic 

 Ichthyology) p. 171 pi. 51, fig. 189 and pi. 52, fig. 195). Of other species belonging to the same type 

 are known the Mediterranean N. rissoajnis (Filippi &l Verany: Mem. Acad. Sc. Torino, t XVIII, 

 p. 190; Vaillant: (Expeditions scientifiques » p. 335, pi. 27, fig. i, coast of Marocco, 2212 metres) and 

 the Japan form, designated by Giinther (Report on deep-sea fishes p. 250, pi. 61, fig. B; Vaillant 

 1. c. p. 387) under the same name, but to which Vaillant and the oft mentioned American scientists 

 now agree to apply a new name (A^. Challejigcri Vaill.). 



As Polyacautlionohis (Alacdonaldia) rostraiits Coll. is new for the ocean bespoken here the 

 Ingolfian specimen deserves to be mentioned in a more particular fashion. As in the related sjaecies 

 the body is elongate, somewhat compressed and tapers to a rather flagelliform caudal portion; the 

 head is small and terminates in a soft, somewhat pointed snout. The total length to the point of the 

 caudal fin is 355"""; the greatest hight (over the anus) c. 29""", approximatively ^12 of the total length 

 (the specimen described by Collett was 480™™, the tail being 275™™, the greatest height 37""", the length 

 of the head 46'""). The distance from the point of the snout to the anus is 120™"', or about '/s of the 

 total length, that of the tail the double of the length of the head and the trunk taken together or 

 ^/j of the whole. The eyes are small, their diameter and the distance between them being 5™-" or '/s 



