Plate I. 



Fig. 1. A bird's feather with a great number of Halobates-eggs (Specimen No. 7), 'd. 



- 2. A piece of a Spirula-shell with Halobates-eggs (Specimen No. 4). '/i. 



- 3. A piece of sea-weed with Halobates-eggs (Specimen No. 2). 'lu 



- 4. A cork stopper quite covered with thousands of Halobates-eggs (Specimen No. 6). 'li. 



Below each of the figures some few eggs, a little enlarged, to show arrangement. 



- 6. A Sepia-shell with Halobates-eggs (Specimen No. 14). 'h. 



- 6. Two Halobates-eggs, one viewed from above, the other from the side, both surrounded by 



the glue-Uke substance. (From specimen No. 5). X 45. 



- 7. Two empty shells of Halobates-eggs, viewed from above, showing the way of opening. 



(From specimen No, 17). X 46. 



