335 



LiCiiAS JtiKESii {ante, p. 282). 



Fig. 323. 



Fig. 323. — Lichas Jukesii.- a, perfect head from Cow Head enlarged two diameters ; 

 6, portion of a liead from Stanbridge enlarged two diameters. 



Remarhs. — A number of specimens of this species having been collected 

 since the description on p. 282 was printed, it is found that the head 

 varies in a remarkable manner. In some the glabella and side lobes, 

 (between the glabella and the eyes) are divided by a transverse groove, as 

 in fig. 323 «, above ; in others the side lobes, only, are divided ; and in 

 some the groove is not visible at all as in fig. 269 (ante, p. 282). I 

 cannot separate these different forms, as there is a perfect series from 

 those with smooth lobes through others with the groove becoming deeper 

 and deeper until the forms above figured with a deep furrow are reached. 



In addition to the Cow Head locality, it is now found to occur abun- 

 dantly in Stanbridge, range 6, lot 20, where it was discovered by T. C. 

 Weston. 



PROTOZOA. 



CaLATHIUM ? PANNOBUM. (N, Sp.) 

 Fig. 324. 



.Description. — This specimen is a fragment of what appears to have been 

 a wide cup-shaped individual. In fig. 324 a, is shown the inner concave 

 surface of a portion of one side. The wall of the cup, so far as we can 

 judge from the structure of this specimen, consists of an inner poriferous 

 layer about three lines in thickness as shewn in the unshaded curved band 

 in fig. h. Outside of this there are some appearances of a thick, rough 

 spongy layer without regular rows of pores, but with an obscure lamellar 

 concentric structure. On this point however there is much doubt, as the 

 remains of the outer layer are imperfectly preserved. The inner surface 

 seems to be smooth and compact. At what appears to be the bottom of 



