144 POST-TERTIARY ENTOMOSTRACA. 



lana, which differs from porceUanea chiefly in its straighter and more attenuated outline 

 and more rugose sculpture. 



3. Cythere Macallana, Brady and Robertson. Plate XIII, figs. 1, 2. 



1869. Cytiieke macallana, B. & R. Ann. and Mag. Nat. Hist., ser. 4, vol. iii, 



p. 368, pi. xix, figs. 5 — 9. 

 1869. — PROPiNauA, G. O. Sars. Undersogelser over Christianiafjordens 



Dybvandsfauna, p. 57, and note, p. 58. 



Carapace of the female, seen from the side^ subreniform ; greatest height situated in 

 front of the middle, and equal to half the length ; anterior extremity evenly, posterior 

 obliquely rounded ; superior margin well arched, highest over the eyes, in front of 

 which it is slightly excavated, ending posteriorly in an obtuse angle ; inferior sinuated in 

 the middle. Seen from above, ovate, widest in the middle, rounded behind, subacuminate 

 in front; width less than the height. Surface of the shell vaguely and distantly punctate, 

 the ventral surface more or less marked with sinuous grooves. Colour yellowish-brown. 

 The shell of the male is longer and narrower, more tapering (as seen laterally) towards 

 the posterior extremity, and has the dorsal margin almost straight ; seen from above, the 

 sides are sul)parallel, and the posterior extremity obtuse ; the shell-surface is usually less 

 sparingly punctate than in the female. 

 Length, -g^th of an inch. 



Distribution. Recent. — Great Britain, Ireland. 



Fossil. — Scotland : Kilchattan, Cumbrae. 



4. Cythere porcellanea, Bradij. Plate XIII, figs. 3—5. 



1869. Cythere porcellanea, Brady. Ann. and Mag. Nat. Hist., ser. 4, vol. iii, 



p. 47, pi. vii, figs. 1 — 4. 

 1869. — — B. & R. Ibid., ser. 4, vol. iii, p. 367, pi. xix, 



figs. 1 — 4. 



Carapace of the female, as seen from the side, reniform ; greatest height situated in 

 the middle and equal to half the length ; anterior extremity rounded, posterior rotundo- 

 truncate, obscurely angulated above ; superior margin arched, sloping almost in a right 

 line behind the middle ; inferior deeply sinuated in the middle. Seen from above, ovate, 

 widest in the middle, width considerably less than the height ; acuminate in front, sub- 

 acuminate behind : surface of the shell polished, quite smooth, or more or less marked 



