The two new genera and two new species of fossil mammal named by David Harrison all originate from Dorset and are from the Middle Eocene.  They are:

2009 - Paravulpavoides
Type species: Vulpavoides cooperi Hooker, 1986

Reference: Harrison, D. L. 2009. A new genus of paroxyclaenid (Mammalia: Condylarthra: Paroxyclaenidae: Paravulpavoides) from the Upper Middle Eocene of Creechbarrow, Dorset, S. England. Cainozoic Research. 6(1-2): 25-35. [PDF available]

2006 – Patriarchamys batesi (Bates’s venerable mouse)
Type locality: Creechbarrow, Dorset SY 8240 9215, Southern England.

Holotype specimen: HZM.1.34326 (in the Harrison Institute collection).

Reference: Harrison, D. L. 2006. A new genus and species of ‘paramyid’ rodent (Rodentia: Ischyromyidae) from the Creechbarrow Limestone Formation (late Middle Eocene) of Dorset, England. Cainozoic Research, 4(1-2): 51-60. [PDF available]

2002 – Glamys hookeri (Hooker’s fossil dormouse)
Type locality: Creechbarrow, Dorset SY 8240 9215, Southern England.

Holotype specimen: HZM.19.32751 (in the Harrison Institute collection).

Reference: Harrison, D. L. 2002. A new species of Dormouse (Rodentia: Gliridae) from the Creechbarrow Limestone Formation (late Middle Eocene) of Dorset, England. Tertiary Research, 21 (1-4): 11-18. [PDF available]