[SYSTEM]
You are answering a single information-extraction question. Use ONLY the supplied source material. Do not use prior knowledge. Give a clear, concrete answer with the specific number, name, year, or value asked for.

[USER]
--- SOURCE ARTIFACT (M3-L4) ---
# Table 024 — No caption detected.

PDF page: 60

```csv
Date,:.: Species,Locality,No.,Average.(g),(%),Total carotenoids.pg/spec. pg/g,Total carotenoids.,"Average Total carotenoids weight Oil ———*———, f-caroten.(ug/g)"
,"13. iii. 52, Aporrhais pes-pelecani",Loch Fyne,ZA,Ito ee,,2°6,23,fe)
10. x. 50,Crepidula fornicata,Burnham-on-Crouch,80,1°42,07,24,17;,13
,Il. xii. 50 C. fornicata,Burnham-on-Crouch,60,I:2I,0-7,36,30,1°8
20. v. 53.,Cypraea spadicea,La Jolla,en,OK,16,49,8-0,Of37
```

--- END ARTIFACT ---

Question:
What would be a reasonable specimen count halfway between the two autumn 1950 sampling dates?

Answer concisely. Cite the row/cell/section you used. State your final numerical answer clearly.