BGS palaeontological registration numbers
Specimens registration numbers consists of a prefix (usually one or more letters), a sequential number (usually within the range 1 — 9999), and occasionally a suffix. Note that the use of a suffix is virtually restricted to Scottish material and that, for example, T123a and T123b are not part of specimen T123, but completely different and unrelated samples. Some prefix codes indicate individual collectors and others indicate major archival collections. Prime specimens may have both a collector’s number and an archival number. Significant prefixes include:
| Prefix | Description |
|---|---|
| GSE | Museum reference collection — Edinburgh (now mostly held at Keyworth) |
| GSL | Museum reference collection — Leeds (now held at Keyworth) |
| GSM | Museum reference collection (Keyworth) |
| 1EE–20EE | Scottish general collections (Edinburgh) |
| Geol Soc Coll | Geological Society of London Collection — British material donated to BGS in 1911. |
| GSa–Gsd | Geological Society of London Collection — British material donated to BGS in 1911. |
| Mik, Mil | Microfossils (Keyworth) |
| MPA | Microfossils (Keyworth) |
| Mic | Microfossils (Edinburgh) |
| MPK | Micropalaeontological type, figured & cited collection. (Keyworth) |
| B, Ba–Bz, | Borehole collection (Keyworth) |
| BDA–BDZ | Borehole collection (Keyworth) |
| BKA–BKK | Borehole collection (Keyworth) |
| BLA–BLM | Former Leeds Borehole Collection (Keyworth) |
| LZA–LZB | Donations (Keyworth) |
| SAA–SAZ | Microfossils (Keyworth) |
