PLATE LXXXIX. 



Fig. 



1. Stylarioides plumosa, 0. P. Midler, from St. Andrews. Enlarged. 



2. Flabelligera affinis, Sars, from St. Andrews. Enlarged. 



8. Ghsetopterus variopedatus, Penier, from Guernsey. Enlarged. 



4. Polydora ciliata, Johnston, from the rocks at St. Andrews. Enlarged. 



5. Semi-diagrammatic view of Streblospio shrubsolii, F. Buchanan. 



t. tentacle; br. branchise; m. mouth ; ph. pharynx; oe. oesophagus; int. 

 intestine; a. anus; d.v. dorsal vessel; t.v, vessel of tentacle; d.b.v. branchial 

 vessel in connection with dorsal vessel ; v. b. v. branchial vessel in connection with 

 ventral vessel; v. v. ventral vessel; sin. sinus; d.s.v. dorsal vessel snipped off 

 from the rest of the sinus, but lying close to the wall of intestine, entering the 

 intra- vesicular ridge ; n. c. nerve-cord ; gng. peristomial ganglion ; neph. e. external 

 limb of thoracic nephridium opening in second segment to exterior ; neph. i. 

 internal limb of thoracic nephridium; coel. coelom ; sept, septa. Longitudinal 

 muscles omitted. From Miss F. Buchanan's figure. 



