This book combines the the knowledge assembled in two publications, published in the journal Colligo: Oliver, G., Groh, K. & Ismail, L.: Type specimens of Macaronesian land snails described by R. T. Lowe held in the Booth Museum, Brighton - A forgotten taxonomic resource. Oliver, G. et al.: Recognised Type Specimens in a Dispersed Collection. The Macaronesian Land Mollusca Described by R. T. Lowe.