556 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 14 



PLATE 44 



Fig. 1. MiVro/ior^//a «7w/a (Pallas), details of zooecia. 

 Fig. 2. Microporella calif ornica (Busk), detaih oi zooecia. 

 Fig. 3. M'tcroporella cribrosa new species, note especially the large 

 cribrate ascopore. 



Fig. 4. Mi<:ro/)or^//a Mw^ona/a (Hincks), showing both median and 

 lateral umbones. 



Fig. 5. Microporella pontifica new species, showing the formation of 

 the peristomial bridge, and the form of the mandible. 



Fig. 6. Microporella marsupiata (Busk), the lunate umbo forms a 

 shallow sac behind the ascopore. 



Fig. 7. Microporella 'vibracidif era (Hincks), showing the very elon- 

 gate vibraculoid mandibles and the form of the ovicell. 



Fig. 8. Microporella setiformis O'Donoghue, minute round asco- 

 pore, small setiform avicularia and form of ovicell. 



Fig. 9. Microporella gibbosula Canu and Bassler, showing lunate 

 ascopore, position of avicularium and form of mandible. 



