Complex sentence: Possibly due to haste he misspelled it as "Belemnotheutis" (rather than the correct "Belemnoteuthis", from Greek "teuthis" meaning'squid'), he also confused the name of the nearby town Chippenham for Cheltenham in his notes.
Split into simpler sentences: Possibly due to haste he misspelled it as "Belemnotheutis" (rather than the correct "Belemnoteuthis", from Greek "teuthis" meaning'squid'). Pearce also confused the name of the nearby town Chippenham for Cheltenham in his notes.