CIROLANA SPINIPES. 301 
terminal segment of the pleon is as long as the preceding 
three segments united; it is somewhat triangular, with 
the lateral margins rounded and the extremity rather 
pointed; the lateral appendages of this segment are 
thin, the inner plate larger than the outer, elongate- 
ovate, scarcely pointed at the tip; and the basal joint is 
prolonged into a-short triangular point, corresponding 
with the “grande dent lamelleuse et acerée qui atteint 
le milieu des lames terminales” of C. hirtipes as described 
by Milne Edwards. 
A specimen of this species was first noticed by the 
late Mr. W. Thompson, which was procured in a fishing 
boat in Dublin Bay, by Mr. T. W. Warren, in 1847. 
This specimen has furnished the figures at the head of 
this description. Another specimen is in the British 
Museum, from Belfast Bay, taken out of a holibut, and 
several specimens are in the Hopeian collection, at 
Oxford, one of which is labelled ‘* Brighton,” and 
another was, we believe, taken off the Yorkshire coast. 
We have also received it from the Moray Frith, where it 
was taken by Mr. Gregor. 
M. Hesse, Ann. des Sc. Nat. vol. v. p. 257, 1867, 
describes several species of this genus that he has taken 
burrowing in the sand on the coast of Britanny. 
