TRANS. MIOROSC. SOC, 1844 — 1852. 



79 



s. 



Sertularia, Hassall (3). 



SHADBOLT, G. (1). The "disk-cutter," 

 a new instrument for cutting cir- 

 cular disks of thin glass for 

 mounting microscopical objects. 

 Also the description of a collecting 

 stick for procuring Infusoria, &c. 

 iii, 32-35. 



— — (2). A description of a new 



form of hair from a species of 

 Tarantula, iii, 41-44, pi. x, figs. 

 1,2. 



(3). On the structure of the 



siliceous lorica; of the genus Arach- 

 noidiscus. iii, 49-54, pi. xi, figs. 

 1-5. 



(4). A short description of M. 



Nachet's prisms for the oblique 

 illumination of transparent ob- 

 jects on the stage of the micro- 

 scope, with formulae for their con- 

 struction and observations on their 

 use. iii, 74-78 : — also. Further 

 observations, &c. iii, 79-81. 



(5). The annular condenser for 



the microscope, a new instrument, 

 contrived and described by Geo. 

 Shadbolt. iii, 132-134, pi. xiv, 

 figs. l*-3*. 



(6). Observations upon oblique 



illumination, with a description of 

 the author's sphsero-annular con- 

 denser, iii, 154-159. 



(7). On the sporangia of some 



of the filamentous freshwater 

 Alga3. iii, 165-170, pi. xxii. 



Shell, Aves, structure, Carpenter (1). 



— Mollusca, growth, Bowerbank (4). 

 Skin of Danes, &c., from church doors, 



J. Quekett (8). 



SOEBY, H. C. (1). On the occurrence 

 of non-gymnospermous exogenous 

 wood in the Lias, near Bristol, 

 iii, 91, 92, pi. xvi. 



SPENCER, J. B. (1). On the femoral 

 plates or scales of the Zootoca 

 vivipara. iii, 135, 136, pi. xi, figs. 

 6,7. 



Spongia (Euspongia), anatomy. Bower- 

 bank (2). 



Stomata, structure, Reade (1). 



Strongylus, 4 spp. in porpoise, J. 

 Quekett (1). 



T. 



Taenia echinococcus. Busk (2). 

 Tarantula, hair, Shadbolt (2). 

 Thaumantias, Busk (6, 7). 

 Tor tula, monstrosity, E. J. Quekett 



(4). 

 Turris, Busk (6). 



VARLEY, C. (1). On Chara vulgaris, 

 ii, 93-104, pis. xiv-xxi. 



(2). Microscopical observations 



on a malady a fleeting the common 

 house-fly. iii, 55-57, pi. xiii (one 

 half). 



Vascular tissue, formation, E. J. Que- 

 kett (1) ; of fossil wood. Bower- 

 bank (1) ; Farre (1) j Hassall (2) ; 

 E. J. Quekett (3). 



Vitelline membrane, blood-vessels, Dai- 

 ry mple (1). 



W. 



WARINGTON, R. (1). On a new me- 

 dium for mounting organic sub- 

 stances as permanent objects for 

 microscopic inspection, ii, 131- 

 133 



WENHAM, F. H. (1). On the illumi- 

 nation of transparent microscopic 

 objects on a new principle, iii, 

 83-90, pi. xiv, figs. 1-6. 



WHITE, A. (1). On a lever movement 

 to the stage of the microscope, 

 i, 165, 166, pi. XX, figs. 1-3. 



WHITE, H. H. (1). On fossil Xanthi- 

 dia. i, 77-86, pi. viii. 



(2). On a new species of fossil 



Xanthidium. i, 87, pi. xx, fig. 4. 



WILKINSON, S. J. (1). Observations 

 on Xanthidium, both fossil and 

 recent, ii, 89-92, pi. xiii. 



WILLIAMS, J. (1). On the occurrence 

 of parasitic Rotifer a in Vol vox 

 globator. iii, 129-131. 



WILLIAMSON, W. C. (1). On the 

 structure of the shell and soft 

 animal of Polystomella crispa, with 

 some remarks on the zoological 

 position of the Foraminifera, ii, 

 159-178, pi. xxviii. 



