Waite and Hale — Lophobkanchiate Fishes 303 



Dunckerl") suggests tliat Syiu/iiatluis carctta Klunz. is a synonym of 5. 

 setnifasciatits Gtintli. { = L. scinistriiitiis Kau|)), and we therefore presume it to be 

 be referable to the genus Lcptouotus. We would say that it is more nearly 

 approached by the species here described, which agrees with it in size and in 

 having the basal half of the opercle keeled. .S". carctta differs from L. costatiis 

 in having the dorsal tin mainly on the tail, also in the relative length of the trunk, 

 it being half the total length, whereas in L. costatiis it is less than one-third. The 

 former s[)ecies is from N'ictoria, the latter from South Australia. 



HISTIOGAMPHELUS McCulloch, 1914 (briggsii). 



a. Dorsal rays 23-24, on 5 + 2 rings. 



b. Annuli 18 + 27: snout? ... ... (cristdtiis) 



bb. .Annuli 22 + 36: snout short ... ... ... (briggsii) 



aa. Dorsal rays 32-33, on 1-3 + 7-8 rings. 



.AnnuH 25-26 + 44: snout long ... ... ... rostrafiis 



HISTIOGAMPHELUS ROSTRATUS sp. nov. 



Syiigiuitliiis seiiiiUisciatiis Zietx, T.K.S., S..V., .\xii, ly()8, p. 298 (not of tiiuilh.). 

 Doryiclitliys hctcrosoiiia Zietz. loc. cit. p. jyy (not of Bleekj. 



Fig- 44- 



D.33: P.12: A.2: CIO: .-Vnnuli 25 + 44 : sub-dorsal annuli 3 + 7. 



Head i -9 in the trunk and 6-3 in the total length: snout I '5 in the head: 

 eye 7-4 in the snout and 10 y in the head. Trunk I 7 in the tail and 3 '2 in the 

 total length. 



Snout very long, twice the length of the rest of the head, deep and much 

 compressed: the anterior portion deepest, more than twice as deep as wide: a 

 high, elevated, knife-like, median crest which bifurcates to form the supraorbital 

 ridges: the distance between the fork and the front edge of the eyes equal to the 

 diameter of the eye : top of head with reticulating raised lines : sides of snout and 

 opercles with radiating striae: occipital and nuchal ridges low. Body a little 

 deeper than wide: ridges well defined, very prominent on the hinder part of the 

 tail: upper ridge continued on to the si.xth caudal scute: median lateral ridge 

 terminates on the last body scute, l)clow the origin of the upper caudal ridge, 

 which ci.immences on the side and attains the deirsal angle at the eighth caudal 

 scute: lower ridge continu(.)us. \'entral surface a little wider than that of the 

 dorsal. Length of caudal \m e(|Ual to the depth of the body: a minute anal fin. 



Described from an e.xample 240 mm. in length, from .Spencer Gulf. 



(9) Diincker. Fauna Siidwest Aust.. ii, 1909. p. 244. 



