CHii/rox. — Ceina. (in Aberrant Genus of the Talit ridae . 



123 



back towards the base, reaching to the basal process already referred to ; 

 the surface of the lappet is finely striated, as if covered with very minute 

 setae, but these are extremely small and delicate, and the whole surface 

 of the lappets seems to be only thinly chitinous and delicate ; in one 

 specimen it has shrivelled into an irregular shape in the process of 

 mounting. The remainder of the mandible is strongly chitinous and 

 firm. The cutting-edge of the mandible, as usual, differs on the two sides. 

 On the left side (figs. 8 and 9) the outer cutting-edge is convex on the 

 outer side, concave within, and formed of about 6 or 7 strong sharp teeth. 

 The accessory masticatory lobe is somewhat similar in general appearance, 

 and bears 4 or 5 sharp teeth. From the base of this arises a very stout 

 spine or process with 4 teeth on its concave side. The spine row consists 

 of 3 stout spines with their distal portions scabrous. In the right 

 mandible (figs. 6 and 7) the outer cutting-edge is similar to that on the 



8 



Fig. 8. — Ceina egregla ; left mandible, from inner side. 

 Fig. 9. — Ceina egregia ; left mandible, from outer side. 



left, and is composed of 5 or 6 teeth, but the accessory masticatory lobe 

 appears to be absent or represented only by a stout bent spine or process 

 which has a tooth on its outer margin about half-way between the base and 

 apex. The spine row in this mandible contains only 2 scabrous spines. 



The lower lip (fig. 10) agrees in shape with that of species of Hyale and 

 allied genera, the two lobes bearing numerous setae on the central part of 

 their convex extremity, and a few minute setae on the surface. 



The first maxilla (fig. 11) has the outer lobe extremely strong and 

 highly chitinized, especially on the outer side and towards the distal end. 

 At its extremity it bears a number of stout spines of the usual character, 

 the inner ones of which are more denticulated on their inner margins than 

 the outer spines are. These all lie closely crowded together, so that it is 

 difficult to count them accurately, but there appear to be 8 or 9 ; Stebbing 

 gives the possession of 9 apical spines as one of the characters of the family 

 Talitridae. The inner lobe differs markedly from the normal character 



