1870.] 43 [Hyatt. 



characteristic. Usually, however, the angular, prominent, ribbed 

 tubercles of the younger whorls at once show great differences. 

 While L. Henleyi thus seems to show variations advancing towards 

 L. Bechei, the last never has a variety like L. Henleyi. 



Liparoceras Bechei. 



Amm. Bechei Sow., Min. Conch., v. in, p. 143, pi. 280. 

 " " Ziet. Verst. Wurt., p. 37, pi. 28, fig. 4. 



Lip. Bechei Hyatt, Bull. Mus. Comp. Zool., no. 5, pi. 84. 



Fold-like lines of growth are prominent in the young, which are 

 otherwise smooth and rounded. These increase in number and 

 sharpness until they become true pila?. 



Two lines of tubercles are introduced, also, in the young, but 

 appear either quite late or comparatively early on the third whorl. 



The septa on this volution precisely resemble the septa of the 

 nearly adult M. laticosta. They have very broad abdominal and 

 superior lateral lobes; the latter unequally divided. The siphonal 

 cells are very large. In one specimen a very decided resemblance to 

 A. sternalis is produced by the angulation of the abdomen and the 

 unusual development, for so young specimens, of the lateral pilae 

 with their tubercles on the last quarter of the third whorl. 



Section of Microscopy. October 12, 1870. 

 Mr. E. Bicknell in the chair. Fifteen members present. 



Mr. C. Stodder exhibited a slide containing albumen coagu- 

 lated with carbolic acid, which had been carefully sealed in 

 July, 1869. With a high power, he showed that the particles 

 were in continual vibration. He thought the appearance of 

 this preparation was identical with what was represented in 

 figures published by Dr. Lionel S. Beale, in his germ-theory 

 of disease. 



Dr. C. Ellis remarked, that all such particles from their mi- 

 nuteness, appeared alike ; and that any solid in a state of fine 

 subdivision exhibited this molecular motion. Their motion 

 was no proof that they were alive. 



