52 



Presents. 



[Feb. 23, 



roots, or only feebly developed on the dorsal side. The cortical layer 

 next to the exodermis constitutes itself into a cork-cambium ; and in 

 the pitcher-roots a secondary cork-cambium arises within the bands 

 of sclerenchyma. Cork is not formed on the distal parts of the 

 pitcher-roots, nor within the most ventral portion of the climbing 

 roots. Sometimes there is a group of large wood-vessels in the 

 ventral portion of the vascular cylinder. 



The points especially worthy of note in the roots of Dischidia 

 Rafflesiana are — 



1. The early cuticularisation of the root-hairs, and the long persist- 



ence of these structures, which, in climbing roots, remain to 

 function as anchoring threads. 



2. The curious passage-cells of the exodermis, which do not possess 



thin cellulose-walls. 



3. The precocious development of cork to prevent excessive loss of 



water. 



4. The radial structure and large sclerenchyma-bands of the 



pitcher-roots. 



5. The dorsi-ventral structure of the climbing roots, as revealed in 



the formation of root-hairs and cork ; also as seen in the 

 structure of the cortex and even of the vascular cylinder. 



IV. " The Har Dalam Cavern, Malta, and its Fossiliferous 

 Contents." By John H. Cooke, F.G.S. With a Keport on 

 the Organic Remains, by Arthur Smith Woodward, 

 F.L.S., F.G.S., F.Z.S. Communicated by Henry Wood- 

 ward, LL.D., F.R.S., V.P.G.S. Received February 2, 1893. 



[Publication deferred.] 



Presents, February 23, 1893. 



Transactions. 



Cambridge, Mass. : — Museum of Comparative Zoology, Harvard 

 College. Bulletin. Vol. XXIII. No. 5. 8vo. Cambridge 

 1892. The Museum. 



Dublin : — Royal Irish Academy. Transactions. Vol. XXX. 

 Parts 3—4. 4to. Dublin 1892-93. The Academy. 



Kew : — -Royal Gardens. Bulletin of Miscellaneous Information. 

 No. 73. 8vo. London 1893. The Director. 



London : — Entomological Society. Transactions. 1892. Part 5. 

 8vo. London. The Society. 



Odontological Society of Great Britain. Transactions. Vol. 

 XXV. No. 3. 8vo. London 1893. The Society. 



