32 Transactions of tlie Society. 



ing them we have as far as possible referred either to Brady's 

 ' Cliallenger ' Eeport, in which all important historical references 

 are given down to the year 1884, or to our Kerimba Monograph 

 (Part II., 1915), in which the most useful references since 1884 

 are given in some fullness. 



The material from Station III presents a certain specialized 

 interest from the fact that it was derived from (a) the shore-sand 

 and (6) the apertural fringes of tubes of the marine worm Tere- 

 hella conchilega ; and though the material (a) was practically un- 

 limited, whilst the material (b) consisted of the fringes of only 

 twelve tubes, (a) yielded sixty-nine species, of which no less than 

 sixty-three were found in (h). The only suggestion we can make 

 to account for the pi'ofusion of Foraminifera on the fringes is that 

 the fringes are extruded above the sand in a more or less viscous 

 condition, and that the gentle rising of the tide in calm weather 

 floats up against them the Foraminifera lying on the surface of the 

 sand before the heavier sands themselves are disturbed. It is a 

 noteworthy fact that the portions of the tubes themselves lying 

 below the surface of the sand are practically devoid of Forami- 

 niferal shells.* 



List of Stations and Material Examined. 



I. Mounts Bay. Dredging 35 to 40 fms, 4 to 5 miles off Newlyu. 

 June 14, 1914. Bulk ef material, unhmited. 



II. Penzance. Shore-sand. A series of scrapings made in May 

 1901. Bulk of material, unlimited. 



III. Marazion. 



{a) Shore-sand. Scrapings made May 1904. Bulk, 1 quart. 



{V) „ „ The fringes of twelve tubes of Terebella 



conchilega. (May 1901.) 



(c) „ „ Several damaged type-slides from the 



Millett Cohection. 



IV. MULLYON. Shore-sand. Cohected August 1892. Bulk, 



unlimited. 



* Cf. a paper on this subject by Prof. Hennessy, F.R.S., in Proc. Roy. Irish 

 Acad. Sci., i. (1871) p. 153, " On the Flotation of Sand by the Rising Tide in a 

 Tidal Estuary." He points out that " the particles of sand, shell, etc., which 

 had become perfectly dry and sensibly warm under the rays of the sun, were gently 

 uplifted by the calm, steadily rising water, and then floated as easily as chips or 

 straws." (See on this subject also A. T. Watson, on " The Tube-building Habits 

 of Terebella littoralis, " Journ. R. ]\Iicr. Soc, 1890, p. G35, pi. xix.) 



