REPORT ON THE AMPHiPODA. 985 



Liljeborgia haswelli, n. u. (PL XCIL). 



1880. Eusints dubius, Haswell, Proc. Linn. Soc. N.S.W., vol. iv. p. 331, pi. xx. fig. 3. 



1882. „ „ Haswell, Catalogue of the Australian Stalk and Sessile-eyed Crustacea, p. 



247. 

 1885 - » i) Haswell, Proc. Linn. Soc. N.S.W., vol. x. pt. i., extract, p. G, pi. \iv 



fig. 1. 



Rostrum narrow, sharply pointed, not half the length of the first joint of the upper 

 antennae, lateral lobes of the head rather broadly rounded, outdrawn between the upper 

 and lower antennae ; the last two segments of the perseon and first five of the pleon 

 dorsally produced backwards into a tooth ; in the first and second segments of the pleon 

 a large central tooth is accompanied by two others on each side, the nearer smaller than 

 the more distant, on the third segment a very small tooth has on either side a large pro- 

 jecting lobe of the hind margin; the postero-lateral angles of the second and third 

 segments have sharp points, very slightly produced ; the sixth segment carries a pair of 

 dorsal spines, beyond which its dorsal margin becomes duplex, diverging on each side of 

 the telson. 



The Eyes are oval, situated on the lateral lobes ; when the ocelli are withdrawn there 

 are markings left on the integument as if of incipient facetting. 



Upper Antennae. — First joint narrowing distally, much longer than the two following 

 joints united ; the second joint short, with the upper margin longer than the lower, 

 carrying two groups of setae, the distal margin oblique ; the third joint broader than long ; 

 the flagellum of thirty-four joints, the first a little longer than the third joint of the 

 peduncle, most of the joints having distally a group of setse and a cylinder ; the secondary 

 flagellum of eighteen joints equalling in length the same number of the primary. 



Lower Antennai longer than the upper, the first joint a little inflated, the second very 

 distinct, with a short and broad blunt gland-cone ; the third joint but little longer than 

 the second ; the fourth joint long, with many groups of spines on the margins ; the fifth 

 still longer, with slenderer spines ; the flagellum of twenty-four joints, of which the first 

 is the longest, the whole flagellum much shorter than the peduncle. 



Upper Lip. — The distal plate transversely oval, with no trace of insinuation of the 

 distal margin. 



Mandibles similar in structure to those of Liljeborgia consanguinea, but here the 

 trunk is broader, while the palp is more slender, shorter than the trunk of the mandible, 

 the third joint with three or four long setae on the inner margin and three at the apex ; 

 the secondary plate of the left mandible is also considerably smaller than the principal 

 plate. 



Lower Lip. — The lobes dehiscent, ciliated round the narrow tops ; the mandibular 

 processes short, divergent, apically rounded. 



First Maxillse. — Inner plate small, with a long seta at the apex ; outer plate short 



(zool. CHALL. EXP. — PART LXVII. — 1887.) Xxx 124 



