Simplify the following text for a Grade 13 native English-speaking person.
Original: However , in the 1840s the Swiss-American naturalist Louis Agassiz did name two fossil fish species after herâ '' Acrodus anningiae , and Belenostomus anningiaeâ '' and another after her friend Elizabeth Philpot .
Simplified: However , in the 1840s the Swiss-American expert on fossil fish Louis Agassiz did name two fossil fish species , Acrodus anningiae , and Belenostomus anningiae , after her , and another after her friend Elizabeth Philpot .