diff --git a/lib/convert-worker.js b/lib/convert-worker.js
index 9db4fb8..40ab0ab 100644
--- a/lib/convert-worker.js
+++ b/lib/convert-worker.js
@@ -493,6 +493,13 @@ function fixCapitalization(xml, book) {
   // a compound noun or at the beginning of a sentence.
   xml = xml.replace(/(?<! {2}|“|Cornell |Nilles )University(?! Road)/, "university");
 
+  // Organ names (e.g. brain, arm) or scientific names are not capitalized, so the "corona pollentia" and friends should
+  // not be either. The books are inconsistent.
+  xml = xml.replace(/(?<! {2}|“|-)Corona/g, "corona");
+  xml = xml.replace(/Pollentia/g, "pollentia");
+  xml = xml.replace(/Radiata/g, "radiata");
+  xml = xml.replace(/Gemma/g, "gemma");
+
   // Especially early in the story, PRT designations are capitalized; they should not be. This fixes the cases where we
   // can be reasonably sure they don't start a sentence, although more specific instances are done in
   // substitutions.json, and some need to be back-corrected.