74 E. GROVE AND G. STUP.T ON 



Longitudinal fold not conspicuous. At each end is an ovate 

 projection more closely dotted than the rest of the surface. 

 Length, 016"; breadth, -0007". (PI. VI., Fig. 12.) 



RUTILARIEJ;. 



Butilaria epsilon, Grev. (" Q. J. M. S.," Vol. xi., p. 228, PI. 9, 

 Fig. 1). — Rare. 



R. epsilo7i, var. tenuis. — Differs from the type in its much more 

 slender form and smaller central process. The marginal setae 

 are distinct and wider apart than in the type. The surface 

 covered with dots forming decussating lines. Scarce. (PI. VI., 

 Fig. 13.) 



BlDDULPHIEJ). 



Biddulphia pedalis, n. sp., Gr. and St. — Valve discoid, '004'' 

 in diam. with 7 to 8 stout marginal processes curved outwards 

 and upwards. Between each process is a marginal projection. 

 In the centre of the valve is a large flat umbilicus, surrounded 

 by a clear annular space, from which branch narrow radial clear 

 spaces to the base of each process. The rest of the surface is 

 covered with five close-set, radiating lines of granules, among 

 which are large puncta, or spines. Below the surface of the 

 valve, and outside of the circumference, are 14 to 16 feet, or 

 projections, of a semi-circular form, marked with radial lines. 

 Not having seen a frustular view, we are unable to say what ap- 

 pearance these feet or appendages, present in that aspect, and 

 must await an opportunity for further examination. We are 

 indebted to W. J. Gray, Esq., M.D., for the only two specimens 

 of this interesting form hitherto observed. (PI. VI., Fig. 22.) 



B. cMnensis, Grev. (" T. M. S." Vol. xiv., p. 81, PL 9, Fig. 16. 

 — Scarce. 



B.podagrosa, Grev., var. (" T. M. S.," Vol. xiv., p. 82, PI. 9, 

 Fig. 17). — We have met with several specimens of a form resem- 

 bling this, but with much shorter horns, which are connected by 

 a keel or web with the inflated centre. There are no traces of 

 spines or claws on the horns. 



B. reticulata, Roper., forma trigona ("Van Heurck Syn.," PI. 

 102, Fig. 3). — Differs from Van Heurck's figure only in the 

 slight concavity of the sides. Cellules very distinctly punctate. 

 Length of side, *0057 // . Scarce. 



Kittonia, n. gen., Gr. and St. — Characteristics : Valves with 



