The Paleontological Institute is delighted to announce the availability of four new issues of Treatise Online. These are available at the Paleontological Institute web site: http://paleo.ku.edu. Members of the Paleontological Society, Palaeontological Association, and SEPM can access these for free directly through their respective member web page.

Treatise Online no. 34–38

Stock, Carl W., Heldur Nestor, & B. D. Webby. 2012. Part E, Revised, Volume 4, Chapter 14: Paleobiogeography of the Paleozoic Stromatoporoidea. Treatise Online 34:1–44, 6 fig., 10 tables.

West, Ronald R. 2012. Part E, Revised, Volume 4, Chapter 2D: Evolution of the hypercalcified chaetetid-type Porifera (Demospongiae). Treatise Online 35:1–26, 6 tables.

West, Ronald R. 2012. Part E, Revised, Volume 4, Chapter 2E: Paleoecology of the hypercalcified chaetetid-type Porifera (Demospongiae). Treatise Online 36:1–68, 46 fig., 3 tables.

West, Ronald R. 2012. Part E, Revised, Volume 4, Chapter 2F: Paleogeography and biostratigraphy of the hypercalcified chaetetid-type Porifera (Demospongiae). Treatise Online 37:1–29, 7 fig., 2 tables.

Debrenne, F., A. Yu. Zhuravlev, & P. D. Kruse. 2012. Part E, Revised, Volume 4, Chapter 18: General features of the Archaeocyatha. Treatise Online 38:1–102, 34 fig.