PLATE XVII. 

 Figs. 1-5. — Cladocarpus pectiniferm. 



Fis. 1. — Natural size. 



Fig. 2. — Portion of a colony, taken from near the distal end, with pliylactocarps and 

 gonangia ; magnified. 



Fig. 3. — Portion of a hydrocladium, still further magnified ; lateral view. The origin of 

 a phylactocarp is seen close to its proximal end. 



Fig. 4. — Same ; front view. 



Fig. 5. — Part of the stem near its proximal end ; showing cauline nematophores arranged 

 in a single linear series. 



