()(l TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



FIG. 



57. Amphiura elegans, in coralline pools and under stones. 



58. Ophiothrix pentapliyllum, common under stones at 



low water. 



59. Ophiocoma nigra, off Castles. 



60. Antedon bifida (=rosacea), outside Breakwater. 



Plate IV. 



Kev to the Chart showing the distribution of the 



Turbellaria, Nemertea, and Ch.etopoda. 



FIG. 



1. Aphanostoma diversicolor, in rock pools. 



2. Convoluta paradoxa, in rock pools. 



3. Convoluta flavibacilluni, in rock pools. 



4. Promesostoma marmoratum, in rock pools. 



5. Promesostoma ovoideum, in shell debris. 



6. Promesostoma lenticidatum, in rock pools. 



7. Byrsophlebs intermedia, in rock pools. 



8. Proxenetes flabellifer , in rock pools. 



9. Pseudorhynchiis bifid us, among drift weed. 



10. Acrorhynchus caledonicus, among sea-weeds. 



11. Macrorliynchns naegelii, in rock pools. 



12. Macrorhynchus helgolandicus, in rock pools. 



13. Hyporhynchus armatus, 15 fms, outside Breakwater. 



14. Prorortex balticus, in rock pools. 



15. Plagiostoma sidphureutn, in rock pools. 



16. Plagiostoma vittatum, in rock pools. 



17. Vorticeros auricnlatiim, in rock pools. 



18. Allostoma pallidum, in rock pools. 



19. Cj/lindrostoma quadriocidatum, in rock pools. 



20. Cylindrostoma incline, among drift weed. 



21. Monotus lineatus, in rock pools. 



'2*2. Monotus fuscus, among Balanus, on rocks. 



23. Leptoplana tremellaris, under stones. 



24. Cycloporus papillosum, under stones and off Bra (Ida 



Head. 



