290 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



occasionally found between the larger ones. The larger of the two 

 specimens here figured shows six bands on the right valve, the four 

 centrals being nearly equidistant or paired, whilst the laterals are 

 more widely separated. These bands are narrow and tine from 

 the umbonal region, but gradually thicken in their descent to the 

 ventral margin, where they are observed to be of equal width. The 

 opposing valve of this specimen possesses only two bands, and these 

 are in the centre. The smaller specimen starts with about seven 

 primary bands which bifurcate soon after leaving the umbonal area, 

 then continue their course to the margin in well-arranged pairs ; 

 a short, isolated band occasionally occurs in the spaces separating the 

 couples. This species is recognized as belonging to McCoy's genus 

 Strehlopteria, first suggested by Mr. Etheridge, jun., although it is 

 only right to mention that Dr. Wheelton Hind places it in Pseuda- 

 musium (Mon. Pal. Soc, 1903, "British Carboniferous Lamelli- 

 branchia," p. 110). 



Both the specimens figured are in the British Museum [L. 10072] 

 and come from Derbyshire. Further excellent examples of this 

 species exhibiting similar remains of ancient colour-markings are also 

 in the British Museum and localized as from Yorkshire and Ireland ; 

 one of these has the stz-ipes or bands following a triplicate arrangement 

 [L. 19679]. 



PAL.ffiOZOIC— Devonian. 

 CEPHALOPODA. 



Orthoceras anguliferum, Archiac & Verneuil. PL XXIV, Fig. 2. 



Orthoceras anguliferum, Archiac & Verneuil : Trans. Geol. Soc. London, 

 vol. vi (1842), p. 346, pi. xxvii, fig. 6. 



Formation. — Eifelian. 



Locality. — Paffrath, Germany. 



The figure on the present plate is taken from the original illustra- 

 tion. The entire surface of the specimen is seen to be covered with 

 a number of regularly sinuated markings arranged longitudinally, 

 thus forming a beautiful chevron pattern. 



GASTROPODA. 

 Naticopsis harpula (J. de C. Sowerby). PI. XXIV, Fig. 3. 



Murex harpula, J. de C. Sowerby: Min. Conch., vol. vi (1827), 



p. 152, pL 578, fig. 5. 

 Nerita suhcostata (Goldfuss MS.), Bronn : Lethsea Geognostica, 



2nd ed., vol. ii (1838), p. 1282 (non Buccinites subcostatus, 



Schlotheim, 1822). 

 Natica suhcostata, Archiac & Verneuil: Trans. Geol. Soc. London, 



ser. II, vol. vi (1842), p. 366, pi. xxxiv, figs. 5, 6. Goldfuss: 



Petrefacta Germaniae, vol. iii (1844), p. 116, pi. cxcviii, fig. 22. 

 Naticopsis harpula, Whidbome : Mon. Pal. Soc, 1891, p. 189, pi. xix, 



figs. 3, 4. 



