These spines are at first papilliform, then elongated and round.
The body is pyriform, broadly truncate on the anterior end, in the middle of which rises a papilliform process (Schnabel).
The superior margin of the latter is not a plain ring, but sends upward a papilliform projection on each side.
papilliform pa·pil·li·form (pə-pĭl'ə-fôrm')
Resembling or shaped like a papilla.