(ah - sef -al- us) [see A cephalia].
A species of omphalositic monsters charac- terized by complete absence of the head and usually of the upper extremities. It is the commonest condition among the omphalosites.
A. dibrachius, an acephalus with two upper limbs in a more or less rudimentary state.
A. dipUS, an acephalus with two more or less developed lower extremities. A. monobrach- ius, one with one upper extremity, a cervical vertebra, and one or two more or less devel- oped lower extremities. A. monopus, one with only one lower extremity, more or less developed. See Acephalopodius. A. sym- pus, one in which the trunk ends in a long conic point at the end of which are attached one or two feet.