MARINE BIOLOGICAL STATION AT PORT ERIN. 315 



Centropages hamatus, March to September. 



Isias clavipes, May, June, and September. 



Corycceus anglicus, June and November. 



Candacia pectinata, June to August. 



Metridia longa, August. 



Anomalocera pater soni, October. 



Lemcea branchialis, November. 



Monstrilla sp., November. 



Larva of Bopyrid, December to February. 



Zoeas, January to June, August and November. 



Megalopas, May to August. 



Molluscan veligers, January to April, Sept. to Dec. 



Lamellibranch fry, September to February. 



Gastropod fry, January to March, July to October. 



Tunicata larvae, Jan., Feb., July, August, and Nov. 



Oikopleura, throughout the year. 



Fritillaria, October and November. 



Fish eggs, February, March, June. 



Fish larvae, February to July. 



It will probably be convenient to readers if the Explan- 

 ation of the Plates is given here rather than at the end 

 of the Report. 



Plate VI. 



Fig. 1. Planarian worm, Oct. 28th, 1898. 



Fig. 2. Trochophore larva, Oct. 28th, 1898. 



Fig. 3. Trochophore larva, showing early stage of meta- 



meric segmentation, Dec. 17th and 30th, 1898. 

 Fig. 4. Trochophore-like larva, with three bands of cilia. 



Pale-green, highly refractive bodies in interior. 



Dec. 30th, 1898, and Jan. 24th, 1899. 

 Fig. 5. Unknown larva. Organ o is paired, and the 



granules in the interior vesicle were in active 



rotation. Jan. 24th, 1899. 



