104 ON SOME NEW AMPHIPODS FROM AUSTRALIA AND TASMANIA, 



rather short. Halves of telson conical, each tipped with a stout 

 spine. 



Sal. Port Jackson. 



Cyrtophium (?) hystrix, sp. nov., Plate YII., fig. 3. 



Cephalon, pereion and first two segments of pleon armed with 

 prominent spines on the dorsal and lateral surfaces ; lateral 

 borders of the second to the sixth segments of the pereion produced 

 outwards and upwards, acuminate. Coxae of the pereiopoda 

 each armed with a small point in its lower border. Antennce 

 stout, superior pair as long as the cephalon and pereion, basal 

 joint of the peduncle short, with an acute spine above ; third 

 joint the longest ; flagellum shorter than the last segment of the 

 peduncle. Inferior antennae longer than the superior pair, very 

 stout, fifth joint of the peduncle longer than the fourth, flagellum 

 much shorter than the last segment of the peduncle. Anterior 

 gnathopoda with the carpus and propodos sub-equal, both armed 

 ventrally with a row of setae, palm straight, oblique ; dactylos 

 longer than palm. Posterior gnathopoda with the carpus very 

 small, the propodos large, ovate, narrower at its distal than at its 

 proximale end, palm nearly longitudinal, undefined. Pereio^^oda 

 subequal, the fourth pair longer than the preceding, the joints 

 broad, the dactylos very stout. Penultimate pair of pleopoda 

 with two unequal rami, the outer shorter and narrower than the 

 inner, tipped with two acute bristles^ the inner broad, armed 

 terminally and internally with a few strong bristles. Last pair 

 of pleopoda uniramous, minute, almost concealed under the broad 

 rounded telson. 



Hob, Port Jackson. 



The absence of the fourth segment of the pleon is probably 

 sufficiently important to separate this species from the genus 

 Cyrtophium of Dana (to which, however, it otherwise bears a close 

 resemblance ; but, having but a single, somewhat mutilated 



