The parts of the Hippocampal Formation are:

Hippocampal Formation HF
1.  CA 1 Field  CA1
2.  Stratum Oriens OrCA1
3.  Pyramidal Layer PyCA1
4.  Stratum Radiatum RadCA1
5.  Lacunosum-Molecular Layer LMolCA1
   5.1.  Stratum Moleculare MolCA1
   5.2.  Stratum Lacunosum LacCA1
6.  CA 2 Field CA2
7.  Stratum Oriens OrCA2
8.  Pyramidal Layer PyCA2
9.  Stratum Radiatum RacCA2
10.  Lacunosum-Molecular Layer LMolCA2
   10.1.  Stratum Moleculare MolCA2
   10.2.  Stratum Lacunosum LacCA2
11.  CA 3 Field CA3
12.  Stratum Oriens OrCA3
13.  Pyramidal Layer PyCA3
14.  Stratum Radiatum RadCA3
15.  Lacunosum-Molecular Layer LMolCA3
   15.1.  Stratum Moleculare MolCA3
   15.2.  Stratum Lacunosum LacCA3
16.  CA 4 Field CA4
17.  Stratum Oriens OrCA4
18.  Pyramidal Layer PyCA4
19.  Stratum Radiatum RadCA4
20.  Lacunosum-Molecular Layer LMolCA4
   20.1.  Stratum Moleculare MolCA4
   20.2.  Stratum Lacunosum LacCA4
21.  Fornix f
22.  Dorsal Fornix df
23.  Dorsal Hippocampal Commissure dhc
   23.1.  Nucleus of..,DHC
24.  Ventral Hippocampal Commissure vhc
25.  Fimbria fi
26.  Alveus alv
27.  Dentate Gyrus DG
28.  Inner Blade of IBl
   28.1.  Molecular Layer of MolIBL
   28.2.  Granular Layer of GrIBl
   28.3.  Polymorphic Layer of PolIBl
29.  Outer Blade of OBl
   29.1.  Molecular Layer of MolOBl
   29.2.  Granular Layer of GrOBl
   29.3.  Polymorphic Layer of PolOBl
30.  Subicular Complex ScomO
31.  Presubiculum PrS
32.  Prosubiculum ProS
33.  Parasubiculum PaS
   33.1.  Post Subiculum PoS
   33.2.  Subiculum S
34.  Fasciola Cinerium FC
35.  Indusium Griseum IG