Career
Henn succeeded Carl H. Eigenmann to the position of curator at the Carnegie Museum of Natural History. Hemigrammus barrigonae Eigenmann & Henn, 1914
Hyphessobrycon ecuadoriensis Eigenmann & Henn, 1914
Hyphessobrycon metae Eigenmann & Henn, 1914
Neoheterandria Henn, 1916
Neoheterandria elegans Henn, 1916
Phalloptychus eigenmanni Henn, 1916
Phallotorynus Henn, 1916
Phallotorynus fasciolatus Henn, 1916
Priapichthys chocoensis (Henn, 1916)
Priapichthys nigroventralis (Eigenmann & Henn, 1912)
Pseudopoecilia fria (Eigenmann & Henn, 1914).