48 MISS MAY E. BA1NBRIDGE ON 



fore lip. This is long and curved, with two small prolongations at each side (F.I.), and 

 completely covers the mandibles. 



Mandibles (fig. 12, Md.). — Curved blades, the outer margin bearing sharply pointed 

 teeth, the inner margin covered with much smaller teeth. 



First Maxilla? (fig. 12, Mx. 1 ). — These are posterior to the mandibles, and are partly 

 covered by the fore lip. They are flat ovate appendages, bearing each two small 

 curved setse. 



Second Maxilla (fig. 12, Mx. 2 ).— Apparently three-jointed. The last joint bearing a 

 bluntly pointed blade with curved teeth on the outer margin : below the teeth is a delicate 

 tongue-sbaped seta. 



First Maxillipeds (fig. 12, Mo-p. 1 ). — Three-jointed, the terminal joint bears a strong 

 short claw (there is no small tooth on the upper margin of the claw as on the same 

 appendage of C. cornutus). The sheath of this claw is covered with fine bristles. 



The hind lip, which is leaf-like in shape, hangs down dorsally to these appendages, 

 the posterior margin reaching to about the level of the first maxillipeds. Two chitinous 

 structures of unknown function can be seen near the lower edge of the lip (fig. 13, H.I.), 



Thoracic Appendages (fig. 9, F. 1 , F.~). — Two pair. They are stout and project a short 

 distance beyond the margin of the body. The ends are blunt and bilobed and are 

 covered with fine bristles. 



General Appearance (male). 

 Seven segments can be distinguished including the cephalothorax. The last abdominal 

 segment bears the caudal furca. A wide intestine full of granules fills up a large 

 portion of the body (fig. 10, /.). There is a large pigment-spot posterior to the second 

 antennas {Fg.). The mouth-parts are situated a considerable distance behind these 

 appendages. 



Appendages (male). 



First Antenna. — Pour-jointed, slender. The terminal joint bearing three taste-hairs 

 or setse at its extremity and a tiny seta at its base. One seta on the third joint and one 

 on the second joint above its junction with the basal joint, on which is a very small seta. 



Second Antenna?. — Two-jointed, very stout with a strong terminal claw. The male is 

 attached to the female by these appendages. 



Month-parts. — The mandibles and first maxillae are not visible, being covered by the 

 fore lip. 



Second Maxilla?. — Somewhat shorter than the maxillipeds. Three-jointed, the terminal 

 joint bears a stout claw and a small seta. 



First Maxillipeds (fig. 11). — Three-jointed, and similar to the second maxilla;. 



Thoracic Appendages (fig. 15). — Two pairs ; apparently biramose. Inner branch 

 paddle-like, bearing a long slender seta and a very short one at its distal end. Outer 

 branch club-shaped, more slender, bearing one short seta at the end. These limbs are 

 very minute, measuring only *04 mm. 



