32 



The mouth is placed at the anterior and superior part of the ani- 

 mal, between two thickish horizontal lips. The labial tentacles are 

 two on each side, rather long, lanceolate, and slightly pectinated. The 

 anus is placed posteriori}^ and superiorly between the gills, and just 

 about the posterior adductor muscle. 



The so-called " foot " is composed of two portions, an upper and 

 quadrilateral (properly the abdomen), and a lower pointed part (the 

 true foot), the two being set at right angles to one another. 



The first portion is sharp-edged and slightly pectinated posteriorly, 

 marked by a groove bounded by two folded lips anteriorly. The 

 second portion is slightly pectinated along its lower edge, pointed 

 anteriorly, prolonged behind into a curved process, where it joins the 

 superior portion. 



Visceral mass. — The mouth opens by a very short CESophagus into 

 a wide pyriform stomach, surromided by a dark dendritic liver. The 

 stomach narrows into a long intestine, which descends for the whole 

 length of the abdomen, and forms one or two loops in the substance 

 of the generative gland ; then passes up again above the stomach, 

 penetrates the heart, and passing between the two small lateral mus- 

 cles of the foot, terminates in the anus. 



Fig. 1 . View of the animal with the right valve of the shell re- 

 moved, and the right lobe of the mantle turned back, a, mouth ; 

 b, anus ; c, filamentous appendages of mantle ; d, gill ; e, grooved 

 superior part of foot. 



Fig. 2. View of the animal from behind, with the valves separated. 

 Letters as before. 



Fig. 3. Visceral ca\ity laid open, a, stomach, surrounded by the 

 liver ; b, intestine ; c, heart ; d, generative gland. 



March 27, 1849. 



"William Yarrell, Esq., Vice-President, in the Chair. 



The Secretary communicated to the Meeting a letter which had 

 been addressed to the Council by Sir Roderick Impey IMurchison, 

 G.C.St.S., &c. &c., in which he gave the gratifying intelligence of 

 his having been assured by the Count Kisselef, Minister of the 

 Imperial Domains of Russia, that if it was possible to obtain another 

 Male Aurochs, it would afford his Excellency the greatest pleasure to 

 receive the high command of His Majesty the Emperor for its 

 transmission to the Society. Although the communication of Count 

 Kisselef did not amount to an absolute promise. Sir Roderick ex- 

 pressed his com-iction, that with so earnest an intention of assisting 

 the Society on the part of the confidential Minister of his Imperial 



