372 Transactions. 



From the Northern Pacific area the following species have been 

 recorded : — 



1881. T. altivelis = rex-salmonorum Jordan and Gilbert(9). Specimen in 



the United States National Museum. 

 1894. T. rex-sahnonoriim Jordan and Gilbert(9). Type specimen in the 



Museum of Leland Stanford, Jr., University. 

 1901. T. ishikawae Jordan and Snyder(4). Tvpe in the Imperial Museum, 



Tokyo. 

 1901. T. ijimae Jordan and Snvder(4). Type in the Imperial Museum, 



Tokyo. 

 1908. T. misakiensis Tanaka(ll). Four specimens, including the type, in 



the Zoological Institute Museum, Tokyo. 



The following species have been recorded from the west-coast areas of 

 South America : — 



1859. T. altivelis Kner. Type specimen in Vienna Museum. 

 1874. T. weychardti Philippi. (Arch. f. Nat., xl, 1874, p. 118, pi. iii ; 

 described from a photograph.) 



These lists are given at length to show the total number of specimens 

 known from the Pacific, and to assist in making comparisons with New 

 Zealand forms. Another specimen, from Station 207, near the Philijjpine 

 Islands, is recorded by Giinther in the " Challenger " Reports, xxii, p. 72, 

 as being similar to T. repandus Costa (Faun. NapoL, tab. ix). Perhaps this 

 may be included in the Pacific regional forms. 



Detailed descriptior^ of the several specimens are appended. 



Trachipterus jacksonensis (Ramsay). Fig. 1. 



1881. Regalecus jacJcsoniensis Ramsay, Proc. Linn. Soc. N.S.W., v, 

 p. 631, pi. XX. 1886. Trachypterus jacksoniensis Ogilby, Cat. 

 Fishes N.S.W., p. 43.. 1901. Trachypterus ishikawae Jordan and 

 Snyder, Jour. Coll. Sci. Tokyo, xv, 1901, p. 310, pi. xvii. 



B. 6 ; D. VI-174 ; C. ? ; P. II ; V. 2. 



Body long and slender, tapering backwards, and not constricted behind 

 the vent. Greatest depth of body, half-way between snout and vent, and 

 slightly greater than the length of head. Height of body at vent is con- 

 tained 4 times in the distance from the snout. Abdominal profile is con- 

 spicuously tubercled. Vent is before the middle of the body. Head, 9 in 

 length. Preorbital wide and rugose. Teeth, 8 in upper jaw, 8 in lower 

 jaw, and 5 in the vomer. Eye large and round, 3| in head. 



Fins. — The first spines of the dorsal slender and not detached, begimiing 

 just behind the posterior margin of the eye. The complete dorsal com- 

 posed of 174 rays, the longest opposite the vent and about ^ the height 

 of the body. All rays smooth. Membrane uniting the rays not attached 

 to the body, and composed of 2 distinct layers. The ventral fin is worn 

 oft", but shows the insertion of two spines in a triangular space opposite 

 the base of the pectoral. The pectoral fin is composed of 11 rays, the 

 first being the longest, about 2| in. The tail is damaged. The lateral 

 line is armed with bony scutes, having short stout spines towards the pos- 

 terior end. Anterior surface of head and snout an intense black, the rest 

 of the body a mottled grey. Darkened oblique bands, formed by bony 

 scutes, run from the interspaces of the dorsal rays half-way to the lateral line. 



