764 



EXPLANATION OF PLATES. 



a, The external ligament. 



b, the gape. 

 Fig. 12. Mytilus Modiolus. Young shell. 



a, The longitudinal furrow of the hinge des- 

 titute of teeth. 

 Fig. 23. Tellina Radula. 



a, The base. 



b, The anterior margin. 



c, Posterior margin. 



d, Superior margin. 

 f, The right valve. 



g, The left valve. 

 Fig. 24. Lepas Anatifera. 



a, The peduncle. 



b, The connecting ligament. 



c, The base. 



Fig. 25. Balanus Punctatus. An articulated Shell. 

 a, The accessory valves. 



PLATE CCVI. 



Fig. 1. Venus Reflexa. 



Fig. 2. Terebratula Vitrea. 



Fig. 3. Pinna Ingens. 



a, The byssus. 



Fig. 4. Turbo Scalaris, or Wentle-trap, of an uncom- 

 mon size, and great value. From the Mu- 

 seum of Mr Bullock. 



PLATE CCVII. 



Contains Diagrams for illustrating the article Conig 

 Sections. 



PLATE CCVII I. 



Contains Diagrams for illustrating the article Conic 

 Sections. 



PLATE CCIV. 



Fig. 1. Patella Coerulea. 



a, The young shell. 



2. Elongata. 



3. Elliptica. 



4. Distorta. 



5. - Zetlandica. 



6. Marginata. 



7. Caecum Glabrum. 



8. Serpula Serrulata. 



9. Tubularia. 



Fig. 

 Fig. 



Fig. 

 Fig. 

 Fig- 

 Fif 

 Fig. 

 Fig. 

 Fig. 

 Fig. 

 Fig. 

 Fig. 



10. Lagena Globosa. 



11. ■ Perlucida. 



12. Urnae. 



13. Spirorbis Carinatus. 



PLATE CCIX. 



Contains Diagrams for illustrating the article Conic 

 Sections. 



PLATE CCX. 



Contains Diagrams for illustrating the article Conic 

 Sections. 



PLATE CCXI. 



Contains Diagrams for illustrating the article Conic 

 Sections. 



Fig. 

 Fig. 

 Fig. 

 Fig. 

 Fig- 

 Fig. 

 Fig. 



Fig. 



Fij 



Fk 



PLATE CCV. 



Spirorbis Heterostrophu 

 — — — — - Minutus. 



■ - Conicus. 



■ - Lucidus. 



F'g- 

 Fig. 

 Fig. 

 Fiff. 



5. Murex Rufus. 



6". Turbo Auricularia. 



7. Helix Hortcnsis, with the margin of the mouth 

 white. 



8. Serpula recta anfractibus tribus contiguis re- 

 gulariter involutis of Mr Walker, Test. Min. 

 Rar. tab. 1. fig. 11. 



9. Serpula recta umbilico pervio anfractu apicis 

 unico involuto of Mr Walker, Test. Min. Rar. 

 tab. 1. fig. 12. 



10. Turbo Elegantissimus. Shell glossy, white, 

 with thirteen spires, longitudinally ribbed; 

 aperture suborbicular ; inner lip a little reflect- 

 ed ; length scarcely three-eighths. Not un- 

 common in England ; rare in Scotland. 



11. Miliola Lactea. Shell pellucid, smooth, thin, 

 egg-shaped, with milky veins. In England 

 and Scotland rare. 



12. Pecten Subauricula. 



13. Mactra Solida. 



14. Truncata. 



15. — Subtruncata. 



FIg.l, 



Fig. 2, 

 Fig- 3. 

 Fig 4. 

 Fig. 5, 



Fig. 6. 



Fig. 1. 



PLATE CCXII. 



Represents the Roller Gin, on a new construc- 

 tion for separating the gins, or seeds, from the 

 cotton. 



Is a representation of the Saw Gin, for the 

 same purpose. 



Represents the Centrifugal Cotton Picker, for 

 cleaning cotton. 



Represents an improved Batting Machine, for 

 preparing the cotton. 



Is a horizontal plan of a New Diagonal Mule 

 for spinning cotton, invented by Mr John Dun- 

 can of Glasgow. 



Is a Perspective Representation of the same 

 Machine. 



PLATE CCXIII. 



Shews part of the Boards of a Pair of Hand- 

 cards. 



Fig. 2. Shews the Form of one of the Wires stuck 

 through the leather. 



Fig. 3. Is a Vertical Section of the Breaker used in 

 carding cotton. 



Fig. 4. No. 1. and 2. Represent a Front View and 

 Plan of the Taker-off and the Finisher. 



