Ordenanzas de la Ilustre Universidad y Casa de Contratación de la M.N. y M.L. Villa de Bilbao : aprobadas y confirmadas por D. Felipe V. y D. Fernando VII : con inserción de los reales privilegios, y la provisión de 9 de julio de 1818 que contiene las alteraciones hechas a solicitud del mismo consulado y comercio.

Digitalización Vitoria-Gasteiz Archivos y Bibliotecas Noviembre 1994 18-129

Calendario para el Reyno de Valencia...: Año 1818

Microfilme. Valencia: BV, ca. 1990

Elysia timida (Risso, 1818) three decades of research

During the last 30 years, studies on Elysia timida (Risso, 1818) have addressed various aspects related to food sources, photosynthetic efficiency of kleptoplasts, population genetics, chemical ecology and reproductive biology, both in the Mediterranean Sea and in the Mar Menor coastal lagoon. E. timida shows a strong specific interaction with Acetabularia acetabulum, retaining functional chloroplasts for at least 45 days and obtaining extra energy in periods when food resources are scarce. It shows control of parapodia, avoiding pigment photodestruction under oversaturated light conditions. The chemical ecological relationships established between E. timida and its potential predator fish, Thalassoma pavo, have also been evaluated, and it has been found that that the extracts of the mollusc contain repellent and unpalatable polypropionate compounds. Population genetics has demonstrated the genetic divergence between populations showing high and significant values of FST and genetic distances, and at least six privative alleles that are not shared with Mediterranean populations have been detected in lagoon populations. This sacoglossan is a poecilogonic species, and its lagoon populations show a greater reproductive output than Mediterranean populations; they produce a greater number of egg masses and embyros per individual, and the capsules have a wider diameter.

Letter from William Croswell to Daniel P. Colesworthy, 1818 January 8

Draft of a one-page letter concerning the payment of a bill and mentioning Croswell's health.