a opp 
PLATE IX. 
. NavicuLa ruomsica, Gregory. a@,S.V.; 6,M.V. 
. Navicuta puicata, Donkin. a, 8. V.; 5, M. V. 
Navicuia stmuLANS, Donkin. a, 8. V.; 5, M. V. 
Navicuna Maxima, Gregory. S.V., from an ori- 
ginal specimen from the Clyde, sent to the 
“author by Prof. Gregory. 
Navicuta Liser, Smith. a,S.V.; 6,M.V. 
