THE CROWN ANIMALCULE. 
29 
new form, which. I have named Sacculns viridis. Ponds at 
Barking’, at Greenwich, at Battersea, and other localities, have 
also contributed their quota to my observations. 
Even dykes and ditches are not to be despised. A small 
ditch in a field at Shac-klewell yielded me the lovely, but 
rather sluggish, Pterodincc patina, and the curious Triartltra ■ 
mystaeina , which leaps vivaciously hither and thither, by 
means of its three long bristles,— both somewhat rare species. 
Another ditch in Parson’s field, Stoke Newington, through 
which a tiny stream trickles, produced Noteus quadricornis, a 
fine, and by no means common species. In a dyke at the Isle 
of Dogs, I obtained Ilydatina sent a, that transparent species 
which Ehrenberg selected as his standard in describing the 
organisation of the class. Ditches at Stratford gave me 
Ohoetonotus liystrix, with Scaridium longicauclum, and Notom - 
mata longisetcc, both remarkable for extraordinary longitude of 
limb ; and an extremely curious form, very abnormal, as yet 
undescribed, but which I have called in MS. Cochleare. Then, 
again, in a dyke at Maidenhead — though this is rather beyond 
a walk from London — I found Diglencc grccndis, a very impos- 
ing species, highly predatory, and furnished with remarkable 
toothed jaws; and a new and fine species of Salpinco, — S. ma- 
cracantha (MS.). The reservoirs at Charing Cross, though not 
rich in species, have yielded me some of the free-swimming 
forms, as Synchcetcc and Amcrcecc ; and among the conferva that 
grows along the stone-work of the margins, Polyarthra and 
Furcularia forficula, a rather good thing. 
Collections of water of higher pretensions, such as the lakes 
in the public or private parks and pleasure-grounds, have not 
in general been more prolific in yield than these humbler pools 
and ditches. Yet these are the suitable places to search for 
those forms — in general of great beauty, and remarkable for 
their crystal clearness — which seldom or never rest, but are 
ever whirling with arrowy fleetness through the water. Such 
are the SyncJicetce, which I have taken in some numbers in that 
fine piece of water known as the Black Sea, on Wandsworth 
Common, and the Anurcece, mostly containing small, but very 
brilliant species, which are abundant in the lake in Kew 
Gardens. The Serpentine has yielded me, besides these, 
Asplanchna priodonta ; and I have taken this, together with 
Notommata cdavulata, a very fine thing’, in the water in Regent’s 
Park. From the lake in Richmond Park, I have obtained 
Stephan ops muticus, PMlodina megalofrocha , and some species 
of Rattvmcs, together with some of the stationary and tube- 
dwelling kinds, as Floscula/ria and Melicerta, and the fine 
predatory Diglencc fordpata. Finally, the water in front of 
Kensington Palace produced me the greatest treasure of all, 
