lxxvi LIST OF PROFESSOR ROLLESTON'S PUBLISHED WRITINGS. 



In conjunction with Charles Robertson, Esq. 

 79. [1861]. On the Aquiferous and Oviducal System in the Lamelli- 

 branchiate Mollusks. (Transactions of the Royal Society, 

 London, 1861.) [The authors conducted a series of ex- 

 periments made in the way of injection, in which they 

 attempt to prove that the orifices on either side of the 

 foot in the Unionidae lead both to the generative gland, 

 the products of which may be seen to issue forth from 

 them at the spawning-season, and to a system of tubes 

 widely spread through the entire foot. They do not 

 believe that any direct communication subsists either 

 between the blood vascular system and this system of 

 tubes, or between either of these systems and the punc- 

 tated depressions and inlets along the foot edge. The 

 blood vessels seem to constitute a system of tubes closed, 

 save at one point and at one lacuna. That point and 

 that lacuna is the pericardial space — a cavity into which, 

 besides the blood of the animal, the water in which it lives 

 also finds its way. As the bivalve shell opens the lacuna 

 is dilated and the water is drawn into it through the 

 organ of Bojanus. The water then passes into the in- 

 terior of the blood vessels, from which they believe it to 

 transude into the system of water-tubes everywhere in 

 apposition with them and under normal conditions to find 

 its exit by these tubes, whilst under such abnormal cir- 

 cumstances as the sudden removal of the animal from the 

 water, the sudden contraction of the muscular foot causing 

 jets of water to pour forth from the dilated semitrans- 

 parent mass, may unload the infiltrated organ in a yet 

 more expeditious manner.] 



Hitherto unpublished 1 . 



Notes on the site of Roman Pottery "Works at the Mynchery, upon the 

 Sewage Farm near Oxford. Page 937. 



Notes on Archaeological Discoveries at "Wytham, Berkshire. Page 939. 



Notes on Archaeological Discoveries at Yarnton, Oxfordshire. Page 942. 



1 These notes form an Appendix to the second volume. 



