He is now at the joint second place in this list. Interestingly all the first four places are held by England keepers. It may be noted here that the Frank Woolley (at the top of the list) was not the specialist wicket-keeper. He had to stand in when the regular keeper (Les Ames) was injured. So Prior's performance is now the worst ever for a specialist wicket-keeper.
Byes Keeper Opposition (Score) Venue Season
37 FE Woolley (Eng) Australia (327) The Oval 1934
33 JT Murray (Eng) India (390) Mumbai BS 1961-62
33 JM Parks (Eng) West Indies (391) Kingston 1967-68
33 MJ Prior (Eng) India (664) The Oval 2007
31 WL Cornford (Eng) New Zealand (387) Auckland 1929-30
31 ATW Grout (Aus) Pakistan (366) Lahore 1959-60
30 M Bisset (SA) England (417) Cape Town 1909-10
30 W Carkeek (Aus) South Africa (329) Nottingham 1912
30 EAC Hunte (WI) England (327) Georgetown 1929-30
30 TG Evans (Eng) New Zealand (189) Wellington 1950-51
Note: Prior has conceded 70 byes in the series so far.
The Test record of most byes in a three Test series is 73 by Jack Blackham which was set in 1893.