VOL. XXXVIJI.] FHILOSOPHICAL TKANSACTIONS. G'lQ 



the cold and chill, which the water might otherwise strike to his body, by re- 

 maining a long time in it. 



As none of" the authors Dr. M. has met with have given any delineation of 

 the parts of generation, or of the receptacles of the castor in a female beaver, 

 he has drawn them after nature, as they are represented in fig. 7, pi. 15; where 

 A shows the 2 ureters; bb the ovaria ; c the uterus lying under the bladder; 

 D the bladder, contracted and empty of urine; e the meatus urinarius, above 

 2 inches long; fp the receptacles, containing the castor; gg the 2 glandules, 

 which open by one common orifice, with the receptacles, at hh the orifices of 

 the castor-ducts ; i the vagina cut ofl^; k the anus; l part of the tail. 



j4 Natural History of the Air and Earth, for the Year 1732. By Dr. Cyrillus, 

 Profes. Med. in the University of Naples, and F. R. S. N° 430, p. 18J, 



A kind of meteorological journal, of no use now. 



An Account of a Book entitled, Jo. Ph. Breynij, M. D. &c. Dissertatio Phy- 

 sica de Polythalamiis, nova Testaceorum classe, &c. Gedani, 1732, 4to. or a 

 Physical Dissertation of a new Class of Shells, which he stiles Polythalamiums, 

 &c. with 14 Copper Plates. By Richard Middleton Massey, M. D. F.R.S. 

 N°430, p. 191. 



In the first chapter the author discourses of shells in general, and premises a 

 method of placing them in difi^erent classes, which he reduces to 8, viz. tu- 

 bulus, cochlidium, polythalamium, lepas, concha, conchoides, balanus, and 

 echinus. 



Chap, li treats of polythalamiums, which he defines a tubulous shell divided 

 into several cavities, conical, straight, or regularly spiral, with a pipe, or canal, 

 passing through each cavity. This again he subdivides into 4, viz. ]. ortho- 

 ceras, 2. lituus, 3. ammonia, and 4. nautilus. 



Chap. 3, treats of the nautilus and nautilites, which last he takes to be a 

 stone formed under ground in the cavities of the nautilus. 



Chap. 4, is of the ammonia and ammonites. 



Chap. 5, is of the lituus (which he names from some resemblance it has to 

 the lituus, or crosier, which the antient Roman Augurs used in their ceremo- 

 nies) and the lituites, or stone formed in its cavities under ground. The shell 

 is yet unknown ; but of the stone he has given a curious draught, as it appears 

 in a marble which was brought from Oelandt, an island of Sweden. 



Chap. 6, is of the orthoceras and orthoceratites, or stony concretion in its 



