CHEESEMAN.— On new Planarians. . 918 
hemal arch is weakest, if has completeness and strength given to it both 
longitudinally and transversely by those locked and overlapping bony scales 
or plates which I call dermo-hemal processes. : 
As to the habits of the Picton herring, I am also indebted to Mr. Fell for 
collecting for me the following particulars :—“ The fish is found all round 
Queen Charlotte Sound, and also the adjoining Pelorus, but is only caught 
here (Picton). Generally it is believed that they do not extend outside, but 
my half-caste fisherman maintains that if sought for properly they would be 
found all round Nelson waters (Blind Bay) and in the straits. They are 
not easy fish to find, unless they are rushing on the surface, which is not 
often, and is a most peculiar sight. My own idea is that they will be found 
to extend much further to the south, but not into the warmer water north. 
These herrings are in Queen Charlotte Sound during the whole year, but 
only come into the shallow bays during winter. At that time of the year 
they keep together in large shoals, but in summer time they keep more 
apart, and are sometimes caught then, though rather hard to find. No 
systematic fishing goes on during summer. , The fish prefer colder water, 
and thus leave the shallow bays when spring sets in. 
“ They spawn during summer, are always very full of roe about Christ- 
mas time, and then keep in small shoals. 
** As to the probable numbers visiting the Sound it is difficult to say, but 
four smoke-houses were kept going all last winter. The hauls made average 
one and a half to two tons, but at times ten tons have been landed. 
** As an article of food it is, when fresh, exceedingly good fried. The 
same fish smoked is sold as Picton herring. The fishermen here have 
very poor appliances and are not skilled at all in curing, and I am sure the 
system is capable of improvement.” 
Art. XXTV.—On two new Planarians from Auckland Harbour. 
By T. F. Cazzseman, F.L.S. 
(Read before the Auckland Institute, 27th September, 1882.] 
1. Thysanozoon aucklandica, n. sp. 
Body thin, depressed ; margin ample, with numerous irregular folds and 
puckers. Upper surface wholly covered with large mobile clavate papille. 
Colour varying from dark ashy-brown to light grey, marbled or shaded with 
paler streaks, sometimes reddish-brown ; under-surface an opaque greyish- 
white, the gastro-vascular canals showing through of a chalky-white colour. 
Head indistinct. Tentacles two, formed by mere folds of the anterior 
margin of the body. Eye-specks about 75, forming a ecrescentic patch in 
