286 PEOCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



was of opinion that it would be more correctly referred to Melania 

 lineata of J. Sowerby, another recognized form of Pseiidomelania, more 

 especially as the true Redding tonensis was restricted to Oxfordian and 

 Corallian times. For present reference purposes the shell is recognized 

 as having affinities with the Sowerbyan species, lineata. 



Pseiidomelania coarctata (Deslongchamps). 

 Melania coarctata^ Deslongchamps : Mem. Soc. Linn. Normandie, 



vol. vii (1842), p. 226, pi. xii, figs. 11, 12. 

 Pseudomelania coarctata, Hudleston : Mon. Pal. Soc. (British Jurassic 

 Gasteropoda), 1892, p. 242. 



Formation. — Baj ocian . 



Locality. — Normandy, France. 



The two original figures of this species represent most gorgeously 

 coloured shells, the groundwork being of cream colour, on which are 

 large reddish-brown patches arranged longitudinally and giving off 

 thin streaks, which bifurcate, trifurcate, and even further split up, 

 looking frequently like a series of antlers. Zigzag patterns are also 

 observable, especially on the body- whorl of Deslongchamps's figure 12. 



The longest of these specimens measures 103 mm. 



PELECYPODA. 



Synctclonema demissa (Phillips). 



Var. iNUTiLis, Whidborne. 



Pecten demissus, Phillips : lUust. Geol. Yorkshire, Yorkshii'o Coast, 



1829, p. 140, pi. vi, fig. 5. 

 Pecten demissus, var. iriutilis, Whidborne: Quart. Journ. Geol. Soc, 

 vol. xxxix (1883), p. 499, pi. xv, fig. 15. 

 Formation. — Bajocian. 

 Locality. — Yeovil Junction. 



A valve of this shell (length 35, height 35 mm.) is described as 

 being covered with "beautiful zigzag colour-markings" in longi- 

 tudinal arrangement. Mr. Whidborne, in the monograph above 

 quoted, also refers to a number of further English Jurassic shells 

 exhibiting relics of coloration, which the student would do well to 

 examine. 



PAL.ffiOZOIC— Carboniferous. 

 CEPHALOPODA. 



Melocekas acus (Koninck). 

 Cyrtoceras acus, Koninck : Ann. Mus. Roy. Hist. Nat. Belgique, 



vol. V (1880), pt. 2, p. 28, pi. xxxv, fig. 6. 

 Meloceras acus, A. H. Foord : Cat. Fossil Cephalopoda British Museum, 

 pt. i, Nautiloidea, 1888, p. 307. 

 Formation. — Bernician. 

 Locality. — Belgium. 



This Cephalopod possesses chevron-shaped markings arranged longi- 

 tudinally. An example of this species is in the British Museum 

 [64837], but the markings are somewhat obscure. 



