MARINE BIOLOGICAL STATION AT PORT ERIN. 37 



Lobster Culture. 



Twenty berried lobsters — five more than last year — were 

 purchased from the local fishermen. The yield of larvae per 

 lobster was, however, considerably smaller than last year, 

 being only 867*5 as compared with 1,914. Of the 17,350 

 larvae hatched, 15,800 were set free in the first and second 

 stages, while the remaining 1,550 were placed in the rearing 

 jars in the hatchery and fed exclusively on plankton. Two 

 hundred and seventy-six of the latter number were successfully 

 reared to the lobsterling stage and set free. The exceptionally 

 high temperature of the summer was found to have a pre- 

 judicial effect upon the larvae in the rearing jars. 



The Aquarium. 



The great falling off in the number of visitors to the 

 Isle of Man during the prolonged Coal Strike is reflected in the 

 number admitted to the Aquarium, and the total for the year — 

 27,900 — compares unfavourably with that of last year. Still, 

 the attendance in July and August was very satisfactory, and 

 compares well with any previous year. The display of local 

 fishes was well maintained, and Professor Herdman's dredging 

 excursions provided many interesting Invertebrates for 

 exhibition. One thousand two hundred and thirty copies of 

 the ' Guide to the Aquarium ' were sold. 



List of Workers, 1921. 



March \0th to April 22nd ... ... ... Professor Herdman. 



Miss E. C. Herdman. 

 March 21st to April \tst ... ... ... Mr. F. J. Brown. 



March 10th to April 20th 

 March 19th to April 20th 

 March 19th to April 1st 

 March 10th to April 15th 

 March 2] st to 28/ h 

 March 25th to April 1 8th 

 March 25th to April 2nd 

 March 25th to April \5th 

 March 25th to April 4th 

 March 25th to April \th 

 March 25th to April 2nd 

 March 30th to April 8th 



... Miss Knight. 



... Miss Hanson. 



... Miss C. E. Mayne. 



... Miss M. Hobbins. 



... Professor Johnstone. 



... Miss L. Thorpe. 



... Miss M. E. Oliver. 



... Dr. W. Ritchie. 



,.. Mr. D. O. Morgan. 



... Mr. W. M. Speight. 



,.. Mr. P. A. Little. 



,.. Mr. C. J. Ford. 



