REPORT OX THE AMPHIPODA. 1287 



The Uropods and Telson are in very close agreement with those of Vibilia, 

 propinqua. 



Locality. — "Cape York," September 1874. One specimen. 



Remarks. — The specific name is chosen to indicate the close agreement between this 

 species and Vibilia matrix, Bovallius, from the Atlantic, from which, however, it is. 

 separated by not having the fifth and sixth segments of the pleon distinct from one 

 another. 



Vibilia australis, n. sp. (PI. CXLIX.). 



Head with an acute rostrum which does not reach beyond the first joint of the upper 

 antennas ; the lateral emarginations deep to correspond with the thickness of the peduncle 

 of the upper antennae ; the first segment of the peraeon dorsally the shortest, widened 

 below, being produced at the rounded front corners ; the first three segments of the 

 pleon long and deep, the postero-lateral angles of the second segment squared, those of 

 the first more rounded, those of the third more acute ; the coalesced fifth and sixth 

 segments not quite equalling the length of the fourth. 



Eyes remarkable, in general form a long irregular oval, not quite parallel to the 

 lateral margins of the head, the ocelli in three rows of about thirteen or fourteen 

 each, forming a compact eye, but with this peculiarity, that as well the crystalline cones 

 in the rows as the rows themselves stand apart from one another ; the cones appear to 

 be rather spherical than conical, or each of the component halves, which can be very 

 clearly distinguished, may be a little more than a hemisphere ; those at the ends of the 

 rows are of diminished size. 



Upper Antennse stout ; the peduncle short, the first joint broader than long, longer 

 than the next two together, these being very short, but almost as broad as the first ; the 

 first joint of the flagellum more than twice as long as the peduncle, tapering at first very 

 gradually, at the end more abruptly ; at the outer side this joint has a rounded 

 and smooth surface, forming on the inner side two sharp edges between which the 

 inner surface or breast bulges a little, being set with a long brush of short setas or 

 cylinders in two series, the rows composing which number about thirty, with from one 

 to five cyhnders in each row ; the edges near the end are serrate, and carry each about 

 a dozen little tufts of small cylinder-like setae ; the almost acute apex of this large joint 

 is tipped with two minute joints, the first scarcely longer than the second but consider- 

 ably broader, and a little decurrent ; the apex of each has a pair of setules. 



Lower Antennas very small (at least in our specimens). The first joint short, bent, 

 not appearing beyond the margin of the head ; the second longer than either the first or 

 third ; the third rather longer than the first, narrower than the second, slightly tapering, 



