Rauber layer

Rau·ber lay·er

(row'bĕr),
1. the thinned-out trophoblastic membrane over the embryonic disc in developing carnivores and ungulates;
2. outermost cell layer that helps form the blastodisc; called blastodermic or primordial ectoderm.

Rauber,

August A., German anatomist, 1841-1917.
Rauber layer - the thinned-out trophoblastic membrane over the embryonic disk in developing carnivores and ungulates.