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.

H. nemoralis. H.

"Habitat ubique in Europæ nemoribus", and "Argen. t. 32. f. 8", were the unprinted additions. Lister's English Conchology was not, of course, mentioned. "Flavescens" and "nigro-purpurascens", were not in the original.

H. hæmastoma. H. imperforata subrotunda fusca fascia longitudinali subrecta alba, ore purpureo.

H. decollata. H. elongata lævis truncato-mutilata.

"Pet. Gaz. t. 66. f. 1", and "Habitat in Arabia. Hasselquist. Santa Cruz. Petiv." were the unprinted additions. The entire account was in the handwriting of our author.

H. amarula. Nerita edentula oblonga, anfractibus multifariam denticulatis.