Waite and Hale — Lophobraxchiate Fishes 301 



Joseph Verco ; St. \'incent (iulf, Mr. .\. < i. Ivlquist : Glenelg River, near Blount 

 Gambler, Mr. W. I'.. I'oole ; Kangaroo Is.. Waitc. Longest example 164 mm. long. 



CoIoiDs. An adult male is brown, the head with a broad cross-band on the 

 occi|)Ut and another 1)etween the eyes: lower surfaces with irregular brown bars 

 radiating from the eye and enclosing white interspaces. Body with slightly 

 darker cross-bars on the back: light oval spots encircle the lateral ridge on each 

 ring and also the junctions of the rings: large dark spots on the lower half of 

 each segment of the trunk. Tail and egg-|)ouch variegated with brown, reticulat- 

 ing lines. 



In a female the ground colour is dark brown : the snout and opercles mottled 

 with white and a series of white dots encircles the eye: interorbital space with a 

 white bar connecting the front edges of the eyes : a few white marks on the 

 occiput. Sides of body and tail with irregular grey marks: underside of trunk 

 light lirown with white mottlings. Dorsal fin pale with small brown spots: 

 caudal fin brown. 



Hah. South .-Australia. 



LEPTONOTUS Kaup, \f^5^ (•blainvillianus). 



Difi-'ers from Sviii/nafliiis in that the females have the dorsal profile con- 

 spicuously elevated and the ventral surface acute, 



a. .Size larger: opercle without ridge, d<irsal rays 38 . . .. ( sciiiistriafits) 



aa. Size smaller: opercle with basal ridge, dorsal rays 24-32. 



b. Sub-dorsal annuli 14-5 . . . . . . . . (caretfa) 



bb. .Sub-dorsal annuli 5-^1-1-3-4 .. .. .. .. costatus 



LEPTONOTUS COSTATUS sp. nov. 

 Pi.?- 43- 



D.28: P.IO: A. 2: CIO: .\nnuli 17-f-37: sub-dorsal annuli 6 -t- 4. 



.Snout 2 '6 in the head and i '2 in the post-orbital portion : eye 2 '5 in the 

 snout and 6-3 in the head: head 2-5 in the trunk and 9 '2 in the total length: 

 trunk 2 -2 in the tail. 



Snout short, with a median crest which bifurcates posteriorly to form the 

 strongly marked supra-orbital ridges : another ridge on each side from the top 

 of the snout to the front edge of the eye : interorbital space concave : opercle with 

 radiating striae and a ridge on the anterior half: distinct occipital and nuchal 

 ridges. Body less than one-third as broad as deep, with the ridges well defined: 

 back nearly flat and the whole ventral surface acute and keeled: upper ridge ter- 

 minates on the third caudal scute : upper lateral ridge extends on to the last body 



