Royal Physical Society. 165 



of Clyde and Leven Vale ; of these, one ranges from 26 or 27 to 32 feet ; 

 and another at 96 to 117 feet above the present sea-level ; these nearly 

 corresponded to the sites of the marine deposits he had described, and 

 show at least an interesting coincidence of level. He had no intention 

 at present of opening up the debateable questions connected with the 

 theory of raised sea beaches, or the powers of tremendous floods or other 

 agencies in carrying marine debris to unusual elevations ; but considered 

 Mr M'Farlane's memorandum well worth recording as a contribution to 

 the facts of this disputed case. 



Wednesday, 23d April 1856. W. H. Lowe, M.D., Pres., in the Chair. 

 The following additions to the library were laid on the table, and thanks 

 voted for the donation :—-> 



1. Memorias de la Real Academia de Ciencias de Madrid. — Tomo I, 

 Parte 3. Ciencias Naturales.' — Tomo II. Parte 1. Ciencias Exactas. 



2. Resumen de las Actas de la Real Academia de Ciencias de Madrid . 

 1851-52, and 1852-3. 



From the Royal Academy of Sciences of Madrid. 



1. Description of two Tubicolar Animals. By T. Strethill "Wright,, 

 M.D., F.R.C.P.E. (With a'piate.) 



In February last I received a number of Caryophillise from Ilfracombe, 

 and, on examining one of these, I found three specimens of an animal, 

 which I am led to believe is undescribed, inhabiting the stone to which 

 the Lithophyte was attached. 



The body of the largest specimen (see Plate, fig. 1), when fully ex- 

 tended, consisted of a hollow tube or tunic about iVths of an inch in length 

 hy T^T>th of an inch in diameter, smooth, and bearing no trace of annulose 

 structure. Its summit was crowned by an expansion of sixty undivided 

 tentacles, similar to those of a Polyzoan mollusc, and clothed with cilia, 

 the motion of which presented the usual appearance of teeth moving in 

 opposite directions on opposite sides of the tentacles. The tentacles were 

 united at their base by a thick membrane, and were arranged in a cres- 

 cent as in Polyzoa of the Hippocrepian type. The concavity of the cres- 

 cent dipped downwards, and consisted of shorter tentacles, as in Plunia- 

 tella. 



The animal inhabited a transparent tube or cell of membranous tex- 

 ture, the mouth only of which could be detected, as the rest of the tube 

 was deeply buried in the stone. Although it was frequently found ex- 

 tended in a remarkable degree from its cell, the slightest shock caused it 

 to retract itself and disappear with a quick jerk within its retreat. As 

 its posterior extremity, therefore, was never visible, it was only possible 

 to examine part of its anatomical structure. This consisted of the ali- 

 mentary system, the vascular system, the muscular system, and the in- 

 tegument. 



