Fig. 5. The nematocysts of the hy droids, a-d, Prohosddactyla flaviclrrata; e-h, P. circumsabella; i-l, P. occidentalis. 
a, e, i are macrobasic euryteles; b, c,f, g,j, k are microbasic euryteles; d, h, I are desmonemes. 
