| The importance of the trilobate form of the trilobite is very much overestimated. |
| It can readily be distinguished by its subspherical, non-alate shell, incurved ventral beak and higher, posteriorly trilobate cardinal process. |
| Cephalis trilobate, inflated, of about the same breadth and length as the tun-shaped thorax and the hemispherical abdomen. |
| The dorsal morphology of both the head shield and tergites of Leanchoilia superlata was strongly trilobate. |
| The trilobate roof of the nave was medival, but has lately been restored. |
| Such trilobate arrowheads are believed to be more accurate and have better penetrating power or capacity to injure than flat arrowheads. |
