40 SCIENTIFIC SURVEY OF NORWICH AND DISTRICT 
Mr. A. H. Patterson at Yarmouth has for many years kept close watch 
upon the catches brought in by shrimpers, longshoremen, as well by those 
fishing farther afield, and has increased the number of Norfolk species 
listed to 161, double that of a century ago. A few of the more interesting 
additions are given here: bergylt, Black Sea bream, boar fish, short- 
finned tunny, ribbon fish (young), gattorugine, power cod, pollack, 
four-bearded rockling, common and Eckstron’s top knots, pearl-sides, 
and black-mouthed dogfish. ‘The blue, basking, thresher, and porbeagle 
sharks have been encountered in the fishing grounds and dead specimens 
occasionally washed ashore have in most cases doubtless received rough 
treatment by fishermen. 
Coming to the freshwater fishes : the eel’s passage up and down streams 
is intercepted by numerous eel-setts often marked by the presence of an 
eel-catcher’s hut or houseboat at the river side. The common bream 
thrives exceedingly in the shallow Broads as does also the pike, the latter 
not rarely attaining a weight of from 25 to 30 lb. The minnow is not 
known to occur below Norwich. Roach, perch and rudd are commonly 
fished for in the rivers and broads. 
THE INVERTEBRATE FAUNA. 
The county offers ample facilities to the student of Invertebrate Fauna, 
possessing as it does a system of broads, five river systems with a network 
of dykes, innumerable ponds, as well as asea coast and estuarine waters. It 
is, however, difficult in a small space to give even the briefest possible 
survey of the various groups included under the above title. : 
Protozoa.—Many well-known forms are widely distributed throughout 
the county. The various species of Vorticelle, including Carchesium 
occur, and special mention may be made of Zoothamnium geniculata, first 
observed and described by Mr. Ayrton in the River Waveney at Beccles 
in Suffolk, and subsequently found by Mr. H. E. Hurrell at Brundall in 
the River Yare. 
Coming to the Rhizopoda the only group which has been intensively 
studied is the Mycetozoa to which the author has devoted some twenty 
years’ work in the county. In spite of the relatively dry climate, the 
average rainfall being about 26 in., the number of species recorded for 
Norfolk is remarkably high; 133 species and 22 varietal forms having 
been recorded to date. Among interesting and rare species met with 
may be mentioned the following : Physarum carneum ; with the exception 
of a small gathering made near Lisbon, this species which occurred 
plentifully at Thorpe, Norwich, has only been found in Colorado, U.S.A. 
P. javanicum (first British record), P. gyrosum which has been repeatedly 
met with in cucumber houses at Eaton, Norwich, P. lateritium, only once 
previously recorded for this country, Lamproderma atrosporum var. debile, 
and var. anglicum found at Whitlingham on dead beech leaves were new 
to science, and Cribraria piriformis var. fusco-atra on a moss-covered pine 
log at Stratton Strawless, a varietal form which has so far only been 
discovered in the Jura Mountains of Switzerland. 
Portfera.—The sponges are poorly represented ; Halichondria panicea 
and Chalina oculata being the only two species which are at all plentiful. 
“i 
