McCULLOCH AND WAITE— FlSHES FROM SOUTH AUSTRALIA 51 



Fins. First dorsal commencing a little before the middle of the pectoral ; 

 its mart^MH rounded and second si)ine longest : rays of soft dorsal increasing very 

 slightly in height hack\vard> : anal almost opposite the second dorsal, and of 

 similar form : pectoral rounded, without free rays, and reaching to below the 

 middle of the interspace Ijctween the dorsal lins: ventrals inserted slightly l)ehind 

 tiic iiectorals, and not quite reaching the \ent : they are completely united, and 

 hax'c a deep hasal membrane: caudal large and rounded. 



Coloiir-iiiarkiiii/s. Yellowish in alcohol, closely speckled witii oli\e brown ; 

 some larger Ijlotches of irregular form are present on the sides, and saddle-like 

 darker markings cross on the back : first dorsal with about four oblique, irregular, 

 dark bands, the outer one forming the margin of the fin, and iridescent blue in 

 life: a bright blue blotch about the middle of the fin: second dorsal with aljout 

 four rows of subcuneiform dark spots on its basal half; a broad, dark, horizontal 

 stripe on the outer half, which is separated from the narrow blackish margin by 

 a white band ; anal dusky, with a blue margin : pectoral and ventral lighter, the 

 latter with dark bars between the rays ; caudal with about ten rows of broad, dark 

 spots on its upper half, the lower portion dusky. 



Dcscriljcd and figured from a specimen 67 mm. long: two otliers of about 

 tjie same size are quite similar, while a numl)er of smaller examples show that the 

 colour-pattern is constant, and developed at an early age. 



This species is distinguished from all other Australian gobies known to us 

 by the scaly operculum. It is congeneric with Muc/ilogobius (Vaiiiiosa) fontinalis 

 Jordan and Scale, with paratypes of which we have compared it. 



I.oc. I'atawalunga, near Adelaide, South Australia; holotype. Noarlunga, 

 South Australia : Freshwater lake. Robe, South Australia. 



W'e have pleasure in associating with this pretty species the name of Mis 

 F.xcellency Sir Henry Lionel tlalway, K.C.]\I.(;.. D.S.O., Governor of South 

 Australia, an ardent angler and patron (.)f the South Australian Fish Protection 

 and Anglers' Association. 



Family BLENNIIDAE. 

 HELCOGRAMMA gen. nov. 



This genus is closely allied to Tri/^tcryyioii Risso, but differs in the structure 

 of its lateral line: this runs downwards from the shoulder to the middle of the 

 side instead of extending backward parallel with the back, and there is no 

 secondary series of incised scales posteriorly. 



Type. H . dccnrrens sp. nov. 



Triptcrygion inediiiiu Gimther is a second species of this genus. 



