Aspects of Dactylopores, Dactylopore Spines, and Miscellany.

(A) Lepidopora sarmentosa, USNM 60135, a conical dactylopore mound, (B) Stylaster stejnegeri, USNM 43271, a cyclosystem with a supernumerary dactylopore, (C) Errina gracilis, USNM 60242, composite dactylopore spine, (D–E) Lepidotheca altispina, USNM 85103, tall cylindrical abcauline dactylopore spines and reverse polarity platelets, (F) Errinopora pourtalesii, USNM 52254, compound dactylopore spines, (G) Errina dendyi, USNM 76302, adcauline dactylopore spines, (H) Errina cheilopora, USNM 85134, adcauline dactylopore spine, (I) Stenohelia concinna, USNM 84747, polychaete gall, (J) Distichopora robusta, USNM 1020571, double axial tube formed by Polydora polychaete, (K) Calyptopora reticulata, USNM 60010, coenosteal papillae, (L) Stenohelia profunda, USNM 52244, a robust ring palisade.