FAUNA NOTES FOR 1897. 537 



During the next half-hour I caught a good many mackerel, but 

 failed to find another crustacean. Being unable to identify this 

 animal, I forwarded it to the Eev. Thomas E. R. Stebbing, who 

 very kindly replied as follows : — "The specimen you send is 

 Eocinela danmoniensis, Leach ; first described from a Plymouth 

 specimen. The species appears to be very rare so far south, 

 although it is more common further north." Messrs. Bate and 

 Westwood^ do not record any of the circumstances under which 

 Mr. Loughrin secured his single specimen of this species while 

 at Polperro. 



A closely allied form, .ffiga monophthalma, is stated by Dr. 

 Johnson to have been "taken adhering to a large cod-fish. . . . 

 in Berwick Bay." My first impression was that the crustacean 

 was disgorged from the mouth of the fish, but the fact that it 

 lived in a jar of sea- water for two days, seems to show that it 

 was attached to the skin of the mackerel, but I could not find 

 any mark on its delicate skin shewing where the crustacean had 

 been attached. 



The Eocinela spent most of its time on the bottom of the 

 jar, but would occasionally swim very rapidly about in the sea- 

 water by means of the foliaceous plates attached to its tail. 



MoLLUSCA. Examples of Archidoris tuberculata were, as in 

 previous years, as numerous as ever in the harbour. All other 

 species of nudibranchs have been very scarce in this district 

 during this year. Only one specimen of Antiopa cristata was 

 noticed during the fall of the year, where last autumn they were 

 so very abundant. 



Till this summer it has never been my good fortune to 

 secure the ova of Sepia o£S.cinalis. I was collecting along the 

 outer edge of the mud-bar at Helford, on the 1 6th of July, 

 when I noticed a large mass of capsules deposited by these 

 mollusks attached to some blades of Zostera marina. On 

 further examination I found that these capsules had only been 

 recently deposited, so about three dozen were placed the next 

 day in a cylindrical case, each end being closed with fine gauze, 

 and sunk in the sea about a fathom from the surface. Twenty 

 days later the embryos were found to be in an advanced stage 

 of development. Five days later the delicate silvery shell could 



