140 BRITISH COPEPODA. 



Doropygus porcicauda was found very commonly in 

 Ascidians dredged by the Rev. A. M. Norman in 

 Birtirbuy Bay, Ireland ; also in specimens of Ascidia 

 jparallelogramma dredged in a depth of twenty-seven 

 fathoms off Hawthorn on the Durham Coast. 



Genus 3. Botachus, Thorell (1859). 



Body elongated, narrow, fusiform; caudal rami 

 armed at the apex with curved spines. First pair of 

 antennas 8- jointed (9- jointed, Thorell) ; second pair 

 3 -jointed, clawed at the apex. Mandible-palp 2- 

 branched, the inner branch 2-, the outer 1 -jointed. 

 Maxillas composed of a basal masticatory portion and 

 a trilaminar setiferous palp ; first pair of foot-jaws 

 stout, subtriangular, 5-jointed; second pair slender, 

 setiferous at the apex. First four pairs of feet with 

 both branches 3-jointed, joints of the inner branch 

 hispid at the margins; fifth pair rudimentary, 1- 

 jointed. 



1. Botachus cylindeatus, Thorell. PL XXXIII, figs. 



1—13. 



Botachus cylindratus, Thorell. Om Krustaceer i Ascidier, p. 55, 

 tab. ix, fig. 12 (1859.) 



Female. — Animal elongated, curvate (figs. 1, 2), 

 abdomen slightly more slender than the thorax; 



