New or Little-hnown Victorian Fosslh. 311 



well-known form in the Silurian of England and Gotland, and 

 has also occurred in the Scandinavian limestone blocks in the 

 drift of North Germany. It is interesting to note the variation 

 in the carapace of the forms now figured, probably due to 

 sexual differences. Somewhat similar varieties have been 

 figured by Jones (loc. supra cit.). The example with a high 

 carapace may be distinguished from B. phillipsiana, J. and H. 

 sp.^ by the nearly semicircular form of its valve. 



Locality and Horizon. — Cave Hill, Lilydale. Silurian (Yerin- 

 gian). 



Bythocypris caudalis, Jones. (PL XV., Figs. 7a-c). 



Bythocyjiris caudalis, Jones, 1889. Ann. Mag. Nat. Hist., 

 ser. 6, vol. iv., p. 270, pi. xv., fige. 2 a-c, 3 a-c. 



Observations. — The peculiar posterior extremity of this form 

 is fairly well seen in the present example ; and the compres- 

 sion of the carapace serves to distinguish it from the other- 

 wise similarly-shaped Pontocypris mawii, Jones,- as also does the 

 larger size of the left valve. 



This species also occurs at Wisby, Gotland. 



Locality and Horizon. — ^Cave Hill, Lilydale. Silurian (Yerin- 

 gian). 



Bythocyppis phased us, var. elongata, Jones. (PI. XV., 



Figs. 5a, b). 



Bythocypris phaseolus var. elongata, Jones, 1889. Ann. Mag. 

 Nat. Hist., ser. 6, vol. iv., p. 271, pi. xv., figs. 8 a-c. 



Observations. — This variety was discovered by Lindstroni in 

 the red clay of Wisby, Gotland (base of the Stricklandinia 

 Maris). Our figured example is even more elongate than the 

 Gotland specimen described by Prof. Jones, but otherwise agrees 

 with it. 



Locality and Horizon. — Cave Hill, Lilydale. Silurian (Yerin- 

 gian). 



1 cf. Jones: Ann. Mag;. Nat. Hist, ser. 5, Vol. xix., 1887, p. 187, pi. v., tigs. 3a, b, 4a-c. 



2 Ann. Mag-. Nat. Hist., ser. 5, vol. xix., 1887, p. 182, pi. iv., figs. 4a-d, 6, 7. 



