178 EEPORT ON THE NUDTBRANCHIATE 



our specimen from a rock between tide-marks at tlie east end of 

 Drake's Island in the spring of this year. As I have mentioned in 

 the introduction, this individual had most perfectly the appearance 

 of a young Halichondria panicea, the " blossom-like cup " (A. and 

 H.) formed by the branchiee simulating the osculum of the Sponge. 

 It was about one inch in length when extended fully, but was very 

 changeable in shape. In appearance it was of a very pale, creamy 

 white colour. 



The branchiae in this individual were twelve in number, but Alder 

 and Hancock state the normal number to be fifteen. I notice that 

 Hancock's figures represent only twelve."^ 



3. A. cocciNEA, Forbes. 



Between tide -marks on the rocks below the Laboratory, May 14th, 

 one specimen, three eighths of an inch long. One was also obtained 

 in the autumn of last year. Mr. Heape found one on the shore at 

 Ram's Cliff in November, 1886, and again in August, 1887, and also 

 trawled one between the Duke Rock and Drake's Island in November, 

 1886. 



4. A. PLANATA, A. and H. 



One specimen, three eighths of an inch long, of a reddish flesh- 

 colour, was obtained with the dredge from near the Duke Rock 

 Buoy May 22nd, 1889. Mr. Heape also obtained one on ground 

 between the Duke and New Grounds' Buoys in November, 1886, 

 between the Duke Buoy and Drake's Island in the same month, and 

 again in Barn Pool January 19th, 1888. 



Sub-family. — Doridid^ PHANEEOBRANCHiATiE, Bergh. 

 Section A. Goniodorin^ ( = Goniodoridje, Bergh). 



2. AcANTHODORis, Gray. 



5. A. PiLOSA, Mailer. 



One fine specimen, an inch and a half long when not completely 

 expanded, from the estuary of the Yealm, opposite the coastguard 

 station, May 25th, 1889. It would come under Alder's third colour- 

 variety (1), being very black in colour. We have obtained five or 

 six other specimens also, but the record of their capture has been 

 lost. They are quite colourless in spirit, and are not so large as the 

 first-mentioned specimen. 



* I have since (Sept. 11th) ohtained another specimen from Drake's Island, and in this 

 the branchial plumes are fifteen in number. 



