H. LUTARIA. _H._ ovata-oblonga umbilicata, interne coloratiore.
"Habitat frequens in lutosis fluviis, lacubus." May not the _Valvata
piscinalis_ be the shell intended?
H. PERVERSA. _H._ ovato-oblonga subperforata glabra.
"Pet. Gaz. t. 44. f. 7", and "Grew. Mus. t. 10. f. 9" cited in
the 'Systema', were also referred to in the MS. "Alba", and "in
quibusdam", were interpolations in the Linnean handwriting: _H.
sulphurata_ was the intended designation.
H. IANTHINA. _H._ subrotunda obtusa patula diaphana.
The entire account of this beautiful shell was written by Linnæus
subsequently to the labours of his amanuensis: the twelve last
printed words were not present. The cited figure of Gualtieri was not
admitted, as a representation, but only alluded to in the final remark
of "Confer Gualt. t. 64. f. O." "List. Hist. t. 572. f. 23", and
"Sloan. Jam. 2. p. 239. t. 1. f. 4" were indicated as delineations.