PalcBozoic Divalved Entomostraca. 185 



rior) is much less rounded, being more truncate, with a steeper 

 slope, than the other. It is possibly an old female or an obese 

 variety. Pi. VI. tig. 4, is a somewhat crushed individual. 



This fine species is dedicated to the memory of my late 

 friend and fellow-worker, Dr. H. B. Iloll, several of whose 

 careful drawings aid me in the present work. 



Dr. Holl pointed out to rae not long ago that this species 

 has nearly the shape of " Gytherellina siliqua, var. qrandisj'^ 

 J. & H. (Ann. & Mag. Nat. Hist. ser. 4, vol. ii'i. p. 217, 

 pi. xiv. fig. 1), but the lateral contour (edge view) is distinctly 

 different, as well as the end view. No doubt, however, exists 

 that this var. grandis should now be regarded as Bjjthocupris 

 grandis^ J. & H. So also G. siliqua *, var. ovata, not far 

 removed from the present PI. V. fig. 2, and PI. VI. fig. 3, 

 may be looked upon as the female of B. grandis. 



Vine Coll, (five specimens) LXVI^,, g. Tickwood Beds. 

 Smith Coll. (five specimens) no. 50. Dudley Tunnel. 



2. Bijthocypris'} reniformis^ sp. nov. 

 (PI. VI. figs, la, lb, 2 a, 2 b.) 



Length. Height. Thickness. 



38 15 13 



25 12 10 



Probably a Bythocypris, kidney-shaped, convex, and much 

 more compressed at one end (anterior) than the other, as seen 

 in tlie edge views, figs. 1 b and 2 b. Fig. 1 a dift'ers from 

 fig. 2 a in being larger and not so high proportionally in 

 front. 



This species is narrower than B. Hollii, and has its greatest 

 convexity at the posterior third instead of in the middle. 



Vine Coll. (two specimens) no. Lxvi^. Tickwood Beds. 



3. Bythocypris'i botelloides, so. nov. 



(PI. VII. figs. 2«, 2 b.) 



Proportions:— L. 31. H. 14. Th. 14. 



Nearly oblong, convex, subcylindrical, like a sausage ; 

 upper and lower edges parallel ; the ends rounded almost 

 equally. Edge view long-oval. End view round. 



Smith Coll. (three specimens) no. 81 ^, 3. Benthall Edge, 



Ironbridge. 



* Keeping for Cytherellina siliqua fig. 5 and those specimens that 

 actually show the internal sulcate structure. 



Ann. & Mag.N. H%st. Ser. 5. Vol. xix. 13 



Proportions: |Fi|. 2: 



