556 



This specimen was obtained recently by Mr. Morton from 

 one of the fish-stalls. Its capture in Tasmanian waters is of 

 great interest. No doubt, like the Schuapper, it is a straggler, 

 otherwise it would be captured more frequently on our 

 trumpeter fishing grounds. 



Labrichthys Mortonii, n.s. 

 D. x't ; A. x*^ ; L. lat. 23. 



Head contained 3}^ times in total length. A posterior 

 canine tooth ; cheek with four rows of minute scales ; 

 prseoperculum entire. The caudal fin is slightly forked. 

 The muciferous channels of the scales of lateral line are 

 bi- and tri-furcato anterior to peduncle ; where the lateral 

 line suddenly descends below posterior of soft dorsal these 

 tubes are all disposed on the upper side and become 

 simply furcate. Color yellowish purple with longitudinal 

 streaks of lighter yellow between each row of scales below 

 latei'al line. Dorsal, anal, ventral, and pectoral fins of a 

 lighter shade ; the two former fins have the membrane inter- 

 spaces marbled with yellow spots ; there is a longitudinal 

 streak of lighter purple along the base. Extremities of 

 caudal fin of a brighter yellow. There is a distinct Uach 

 Notch on the body at root of the last tivo soft rays of dorsal. 



Total length, 9 inches ; length of head, 2} inches ; greatest 

 depth, 2t inches. 



Mouth of Derwent : Found occasionally at a depth of 40 

 to 50 fathoms. 



THE EIVEE DERWENT : NOTE UPON THE FLOOD 



OF 23ed SEPTEMBER, 1884. 



By a. Mault. 



[Bead October 13, 1884.] 



It may be useful to put upon record a few observations 

 upon the late flood in the Eiver Derwent. 



I should premise that during the past two years I have had 

 occasion, in connexion with the survey of the Derwent Valley 

 Railway, to take various measurements across the river at 

 several places above New Norfolk ; and at these places I 

 have noted the volume of water, and the rate of flow at 

 different seasons. From these observations I inferred that 

 the average flow of water in the Derwent would be equal to 

 that of a river 360 feet wide and 4 feet deep running at the 

 rate of two miles an hour, giving a daily C[uantity of 13i 

 million cubic yards, or lOJ million tons of water. The 



