THE society's NOTE-BOOKS. 393 



spiracle. The Roman numerals are placed in their respective 

 segments. 



Fig. 6. — Hairs from Caterpillar of Tiger Moth. 



a, Three hairs slightly magnified, x 10. 



b, Base of a brown hair, x 50. 



c, Central portion of one of the grey hairs, x 50. 



d, Apex of a brown and of a grey hair, x 50. 



,, G. — Scales from wing of Tinea vestianella. 



a, Long, slender, hair-like scale. 



b, Bifurcate ditto. 



c, One of the same class, with three forks. 



d, Large characteristic scale from central portion of wing. 



e, Smaller scale belonging to the same class. 



/, Small translucent scale, having perhaps sensory functions. 

 g, Very minute scale, perhaps ill-developed. 

 iVofe.— These scales should have been separated from the 

 Hairs on the Plate by a vertical line. We observe 

 also the numeral 6 is omitted. 



Plate XXIV. 



Fig. 1. — Dermestes lardarins, Bacon Beetle, from living specimen, x 3. 



,, 2. — Left Antenna, showing the number of articulations, x 25. 



,, 3. — Fore tarsus from left side. \ 



,, 4. — Middle tarsus do. > x 25. 



,, 5. — Hinder tarsus do. ) 



,, 6. — Portion of compound eye of the left side, showing the pyra- 

 midal sclerotics of several of its facets. 



,, 7. — Ovipositor. The Roman numerals denote the segments 

 represented by the joints composing it. 



,, 8. — Reduced figure of a drawing made from the life, in the 

 aquarium at Boulogne-sur-Mer, of what I take to be the 

 small spotted Dog-Fish. 



,, 9. — Portion of the skin, with scales, from specimen on slide, x 15 



,, 10. — Scales of Scyllium caniciditm, with the expanded base upper- 

 most, X 25. 



,, 11. — Side view of another scale of the same, x 26. 



,, 12. — Sectional view of same, specially given to show the outline of 



the tooth-like plate of the scales, x 25. 



The three latter figures, taken from specimens separated by 



the action of potash, kindly given me by another member. 



,, 13. — Transverse section of Human Molar Tooth, x 3, showing — 

 e, Enamel; d., Dentine; o.d., Osteo-dentine, or "cement," 

 which appears to have invaded and completely filled the 

 central pulp-cavity, with devarications therefrom. 



All drawn by TuflFen West. 



Erratum.— Explanation of Plate XXII., Fig. 2, p. 392, should read 

 "Represents a portion of Spatangus purpureus, with," etc. 



iNTEfiNATIOXAL JOURNAL OF MICROSCOPY AND NATURAL SCIENCE. 



Third Series. Vol. VI. aa 



