1230 THE VOYAGE OF H.M.S. CHALLENGER 



The Third Perwopods may on the one hand be regarded as completely developed, 

 inasmuch as they have the full number of joints, but. on the other hand, compared with 

 the elongate limbs which precede and follow them, they have a dwindled appearance that 

 might well be attributed to incomplete development. 



Proto novae-hollanduB, Haswell, 1880. 



1880. Proto Novx-Hollandix, Haswell, Proc. Linn. Soc. N.S.W., vol. iv. p. 275, pi. xii. fig. 3. 



1882. ,, „ Haswell, Catal. Australian Crust., p. 310. 



1882. „ „ Mayer, Die Caprelliden, p. 26. 



1885. ,, „ Haswell, Proc. Linn. Soc. N.S.W., vol. ix. pt. iv. (extr. p. 5). 



Head and body without spines ; the very short first segment of the perseon intimately 

 coalesced with the head, the following segments sucessively longer to the fifth, the sixth 

 as long as the fourth, shorter than the fifth, the seventh very short ; the second segment 

 dilated at about the middle in the male, but more proximally in the female, in each case 

 at the point of attachment for the second gnathopods. 



Eyes rather large, dark in specimens preserved in spirits, not regularly rounded, 

 the ocelli numerous, as many as a hundred and fifty to each eye. 



Upper Antennae. — First joint not as long as the head with the first segment ; the 

 second joint much thinner than the first, not twice as long ; the third joint intermediate 

 in length between the first and second ; the flagellum of seven slender joints, carrying 

 short cylindrical filaments, these joints together not as long as the peduncle ; the second 

 and third joints of the peduncle and the joints of the flagellum with the margins minutely 

 tuberculate in the male, but not, or almost imperceptibly, iu the female, in which the 

 flagellum is of six joints. 



Lower Antennae much slighter than the upper, the peduncles of which they equal in 

 length ; first and second joints very short ; third a little longer than the preceding two 

 together ; fourth a little shorter than the fifth ; fifth about equal in length to the third 

 joint of the upper antennae ; flagellum of three very slender joints, together not equal to 

 the fifth joint of the peduncle in the male, but equal to it in the female, in which this 

 joint is not longer than the fourth. 



Mandibles. — The cutting edge with five unequal teeth on one mandible and six 

 on the other, of which one is more prominent than the rest ; the secondar)? - plate with 

 four teeth on one mandible, probably on both ; there are also some laminar spines, 

 not seen with sufficient distinctness for particular description ; the second joint of the 

 palp with the spines few and scattered, the third with two at the apex and several at 

 a little distance from the apex on and near the oblique ciliated apical or inner margin. 



First Maxillae. — The outer plate with six slender spines on the distal margin, 

 only weakly denticulate ; the palp with the apical margin not expanded, carrying four 



