LOXOCONCHA. 187 



Carapace of i\\Q female, as seen from the side, subrhomboidal ; greatest height in the 

 middle, equal to more than half the length, rounded obliquely in front, produced behind 

 into an obtuse median projection ; superior margin almost straight, inferior sinuated in 

 front, convex behind. Outline, as seen from above, broadly ovate, extremities mucronate. 

 The carapace of the male is much more elongated, height equal to half the length ; 

 dorsal margin quite straight and angular at its extremities ; posterior margin rounded. 

 Surface of the shell marked with large and deep, polygonal, concentrically arranged exca- 

 vations, which, however, are mostly absent from the margins of the valves. 

 Length, ^rd of an inch. 



L. guttata occurs in a recent state in our seas, in depths of 10 — 30 fathoms. 



Distribution. Recent. — Great Britain, Ireland, Bay of Biscay, Levant. 



Fossil. — Scotland : Drip Bridge. 



3. LoxocoNCHA MULTiroRA {Norman). Plate XIV, figs. 11, 12, a, h. 



1858. ? C-iTHERE HASTATA, Egger. Ostrak. Miocan-Scbicht. Ortenburg, p. 32, pi. ii, 



fig. 6. 

 1864. — MULTIFOBA, iVbrwjflw. Brit. Assoc. Rep., p. 192 ; Nat. Hist. Trans. 



Nortbumberland and Durbam (1865), vol. i, 

 p. 18, pi. vi, figs. 13—16. 

 1868. Cythekoptekon multiforum, Brady. Monog. Rec. Brit. Ostrac, p. 449, 



pi. xxix, figs. 38—42. 



Carapace, as seen from the side, compressed, rhomboidal ; height equal to about half 

 the length and nearly equal throughout ; extremities oblique and slightly rounded ; superior 

 margin straight, shghtly sinuated in the middle; inferior almost straight; seen from 

 above, ovate, widest behind the middle ; width and height equal ; acuminate in front, 

 more obtuse behind. Shell marked over its entire lateral aspect, with large and rather 

 distant angular fossae, and behind the middle, just within the inferior margin, raised into 

 an irregularly curved alseform ridge. 

 Length, -g^th of an inch. 



The almost obsolete alseform projection of the shell induced the author of the 

 ' Monograph of the Recent British Ostracoda ' to place this species in the genus 

 Cytheropteron. We have, however, since that period become acquainted with some even 

 more distinctly alate forms which undoubtedly belong to Loxoconcha, and, as the present 

 species is in general appearance quite in accord with that genus, we have no hesitation in 

 removing it from its former position. 



Distribution. Recent. — Great Britain. 



Fossil. — Ireland : Portrush. 



