Temnechinus

Temnechinus is an interesting genus of Sea-urchins or Echinoidea (q.v.), belonging to the family Temnopleuridae. The shell or test has numerous grooves or pits along the sutures; but, as these are only "false pits," the genus belongs to the sub-family Glyphocyphineae. Specimens of the genus are common in the Crag deposits of Suffolk, where two species occur; one of these is found also in beds of the same age in Belgium and a living species occurs in the Azores and West Indies. In addition to its distribution, the genus is interestlug as one of the few Sen-urchins which are viviparous and do not pass throngh a metamorphosis. The young are protected in "marsupial ponches."