The organisms covered in this book are crustaceans
from Schaeffer's Abhandlungen von Insecten. Why it's in his Abhandlungen von Insecten, I have no idea.
And also, if you're claiming that a creature is imaginary, isn't it counterproductive to provide a color picture of it?
This book is only 16 pages long, so not as important as the other (fungal) one.
Also known as Iacob Christian Schaeffers ... Einleitung in die Insectenkenntnis
Also known as Natürlich ausgemahlte Abbildungen regensburgischer Insecten
This concerns the molluscs now known as Helicidae
I have seen this listed as a book on insects; evidently by someone who couldn't read the German title.
Translation of: Versuche und Muster ohne alle Lumpen, which is the first two volumes of the sämtliche papierversuche
There are samples of paper in this book, too, but there also seems to be more text.
The book consists of specimens of paper (and some fabrics) made of different materials