34 



CAKL BOVALLIUS, AMPHIPODA HYPElillDEA. 



3. LANCEOLA SERRATA, C. BOVALLIUS, 1885. 



PI. V, fig. 2—13. 



Diagn. Cot-pus non carinatum, integumento i*eticulato. Caput rostrum minimum obtusum gerens. 

 Oculi parvi, rotundati. Segmentum primum et septimum pereii brevissima, segmentum 

 quartum longissimum, segmenta tria ultima segmento quarto multo longiora. Pedes pereii 

 primi paris metacarpo gracili, elongato, longiore quam latiore. Pedes quarti paris pedibus 

 quinti paris breviores. Pedes septimi paris pedibus quarti paris multo breviores. Pedes 

 sexti paris quam pei*eion longiores. Segmenta phi in dorso serrata. Pedes uri elongati. 

 Telsou pedunculo ultimi paris pedum uri brevius, acuminatum. 



The body is not keeled, the integument is reticulated. The head is provided with a very 

 small, obtuse rosti'um. The eyes are small, rounded. The first and seventh segments of 

 the pereion are the shortest, the fourth the longest; the last three segments are much 

 longer than the fourth. The first pair of pereiopoda have an elongated narrow metacarpus, 

 much longer than broad. The fourth pair are shorter than the fifth. The sixth pair are 

 longer than the pereion. The seventh pair are much shorter than the fourth pah\ The 

 pleonal segments are dorsally serrated. The uropoda are elongated. The telson is pointed, 

 shorter than the peduncle of the last pair of uropoda. 



Colour. Hyaline. 



Length. 38 mm. 



Hab. The mouth of Davis strait. (D. M.). 



Syu. 1885. Lanceola serrata, C. BOVALLIUS. »On some forgotten genera among the Amphipodous 



Crustacea).. Bih. t. K. Sv. Vet. Ak. Handl. Bd 10. 

 N:o 14, p. 7. 

 » » » 1887. "Arctic and Antarctic Hyperids». Vega-Exp. Vetensk. 



Iakttagelser. Bd. 4, p. 554. 



In general habitus this species comes near Lanceola Say ana, but it is easily distinguished 

 by the serrated dorsal side of the pleon, the longer and more slender legs, and the shorter 

 telson. Only the female is known. 



The head is three times deeper than long; the obtuse rostrum is scarcely half as 

 long as the rest of the head. The head with the rostrum is shorter than half the first 

 pereional segment. 



The eyes are placed just at the base of the first pair of antenna?; they are almost 

 round and consist of about 20 ocelli each. 



The first pair of antennae (PI. V, fig. 3) are more slender than in the preceding 

 species, as long as the head and the first pereional segment together. The first joint of the 

 peduncle is much longer than the two following together. The first joint of the flagellum is 

 very elongated, more than three times longer than the peduncle; the following joints are 

 three in number, the first is the longest, longer than the two preceding together (PI. V, fig. 4). 



The second pair of antennas (PI. V, fig. 5) "reach beyond the posterior margin of 

 the third pereional segment (?); the third peduncular joint is the longest, much longer 

 than the flagellum (5:3). 



