endotheca

‖n. [ NL., from Gr. 'e`ndon within + qh`kh a case, box, fr. &unr_; to place. ] (Zoöl.) The tissue which partially fills the interior of the interseptal chambers of most madreporarian corals. It usually consists of a series of oblique tranverse septa, one above another. -- En`do*the"cal a. [1913 Webster]