MisceUaneous. 279 



right angles to the nucleus. The concentric layers often exhibit an 

 irregularity which the Author maintains to be incompatible with 

 their cliemical origin. Again, granules are found, made of calcium 

 carbonate occurring in two forms — a clear crystalline portion repre- 

 Bcnting the organic structural part, and an amorphous portion con- 

 sisting of ordinary carbonato of lime, which is either infilling or 

 secreted material, possibly both. 



In discussing the origin of the crusts around the nuclei the Author 

 treats of the radial structure which is so marked a feature in the 

 crust of oolitic granules. This structure luts the appearance of light 

 and dark striic when seen by reflected light : the light are tubules 

 which have grown at right angles to the nucleus, while the dark are 

 secondary formations. 



He refers to Rothpletz's description of the oolitic granules of the 

 Great Salt Lake, which are stated to have originated from the 

 growth of lime-secreting algae, and thinks it possible that the fossil 

 forms are of like origin, though not necessarily due to organisms 

 allied to alga?, and possibly even lower in the scale of life ; Oir- 

 vanella was the first type of oolite-forming organism discovered, and 

 it is simply a tubule. 



February 6, 1895.— Dr. Henry Woodward, F.R.S., 

 President, in the Chair. 



The following communication was read : — 



* On Bones of a Sauropodous Dinosaur from ^Madagascar.' Bv 

 R. Lydekker, Esq., B.A., F.R.S., V.P.G.S. 



The bones described in the paper were collected by Mr. Lxst to 

 the east of the town of Naruuda, on the north-eastern coiist of Mada- 

 gascar. Tliey include vertebrie, limb-bones, and portions of pectoral 

 and pelvic girdles. These bones are described in detail, and the 

 animal which possessed thera is referred to the genus Boihrio- 

 spondylus, Owen : a dorsal vertebra, described in the paper, being 

 taken as the type of the new species. 



The identification of the Malagasy reptile with a type occurring 

 in the Jurassic rocks of England harmonizes with the reference of 

 some of the strata of the island to the Jurassic period. 



MISCELLANEOUS. 



On the Ci/)Juilic Lobe of Enphroume * . By Emile-G. Racovitza. 



The cephalic lobe of the AmphinomidiD, in its most complicated 

 condition, is provided with the following organs : an unpaired 

 antenna, inserted near the posterior border, and two pairs of eyes, 

 one of which is situated in front of, and the other behind, the base 

 of this appendage. A pair of antennsc is situated in front of the 

 anterior pair of eyes. On the ventral side, in front of the mouth, 



* The investigations were conducted at the Arago Laboratory ( Buiiyuls- 

 Bur-Mer). 



