322 PELAGIC LIFE, FALMOUTH. 



coal hulk on which I observed these specimens was taken into 

 the roadstead to supply a steamer with coal. When the weather 

 moderated and I was again able to visit this hulk in my boat, I 

 was sorry to find that all the supposed specimens of Theeacera 

 had vanished, and only a few iintiopa remained in places where 

 they had been so very abundant. On the 16th of October I 

 secured from the hulks the following nudibranchs : large 

 quantities of vEolis coronata, several ^. alba, one specimen of 

 ^olis olivacea, and one ^. farrani. 



On the next calm day I went and examined all the moored 

 buoys in the harbour to see if I could find any nudibranchs on 

 them. From the Yilt buoy I secured a single ^olis coronata, 

 the rest of the buoys not having any nudibranchs on them. 



On the 5th of December, while collecting at low water 

 spring tides on the southern shore of Pendennis point, I found 

 under a stone one Groniodoris castanea. Dr. Cocks records this 

 species as not uncommon. A few days later I went and 

 examined the sides of the coal hulks, and was pleased to find 

 on them immense quantities of this moUusk. In the majority 

 of instances the nudibranchs had congregated amid- ships, and 

 being mostly of a rich dark red colour, were hardly distinguish- 

 able from that Tunicate on which they were feeding. I sent a 

 large number of the mollusks to Mr. Grarstang, and with them 

 some specimens of the Tunicate for identification. A few days 

 later Mr. Garstang informed me that the Tunicate was probably 

 Leptoclinum gelatinosum. These mollusks had in many cases 

 'taken up their abode on the vessels sides about three inches 

 under water-line, and had deposited numerous coils of spawn in 

 this region. On the 12th of that mouth a quantity of coal was 

 removed from one of the hulks to supply a steamer, which was 

 taken along side. This had the effect of raising the hulk about 

 twelve inches out of the water, and as a natural consequence the 

 mollusks were in numerous instances left some distance from the 

 water. I naturally imagined that the mollusks would possess 

 sufficient intelligence to find their way lower down, but this did 

 not seem to be so, for I marked some specimens, and in two days 

 they were all dead, having died I imagine for want of sea water. 

 Mr. Garstang, loe. cit. records the capture of several specimens 

 of this nudibranch at Plymouth. 



