KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND. 21. N:0 5. 27 



The pleon is scarcely longer than the three preceding pereional segments together. 



The pleopoda are similar to those of Tyro Tallbergi. 



The urus is shorter than the two preceding pleonal segments together. 



The uropoda (PI. Ill, p. 1 7) ; the first pair is finely serrated along the outer margin 

 of the interior ramus, the second along the inner, excavated margin of the interior 

 ramus; the third pair are quite smooth. The exterior rami of the first and second pairs 

 are very narrow, equalling a fourth of the length of the corresponding interior rami; those 

 of the third pair are half as long as the interior rami. 



The telson is triangular, equalling a fourth of the length of the peduncle of the 

 last pair of uropoda. 



The second family, LANCEOLIDiE, C. BOVALLIUS, 1887. 



Diagn. Caput parvum, curtum, non tumidum. Oculi parvi vel obsoleti. Antennce primi paris rectae, 

 parti anteriori capitis affixae, flagello compresso instruct*, articulus primus flagelli permag- 

 nus, articuli sequentes parvi perpauci terminales. Antennas secundi paris compressas 

 non angulatae, parti anteriori capitis aff'ixas. Tnstrumenta oris masticatoria, mandibular 

 palpo instructae. Pedes pereii ambulatorii, pedes septimi paris non transformati. Pedes uri 

 ramis instruct! 



The head is small, short, not tumid. The eyes are small or indistinct. The first pair of an- 

 tennce are straight, fixed at the anterior side of the head, the flagellum is compressed, the 

 first joint very large, the following small, terminal, few in number. The second pair are 

 compressed, not angulated, fixed at the anterior side of the head. The mouth-orgarts are 

 adapted for mastication, the mandibles are provided with palp. The pereiopoda are walking 

 legs, the seventh pair not transformed. The uropoda are provided with rami. 



Syu. 1887. Laiieeolidte. C. BOVALLIUS. "Systematical list of the Amphipoda Hyperiidea». Bih. t. K. 



Sv. Vet. Akad. Handl. B. 11. N:o 16, p. 5. 



The animals of this family have shared with the Tyronidce the fate of being neglected 

 from the very first moment they made their entrance into the zoological system. None of 

 the zoologists have recognized the genus Lanceola of Say in its true form; it was pushed 

 about as a literary curiosity from one place to another in the carcjnological system. H. Milne 

 Edwards in 1830 *) cites it as synonymous with Hyperia. James E. de Kay in 1844 2 ) 

 identified the species Lanceola pelagica described by Say with Hyperia Latreilli Milne 

 Edwards. C. Spence Bate in 1862 3 ) interpreted it as a Vibilia, wherein he was followed 

 by subsequent authors. In 1885 4 ) I described some animals, which in my opinion were 



x ) "Extrait de Recherches pour servir a l'Histoire naturelle des Crustaces amphipodes». Ann. Sc. Nat. 

 Tome 20 me p. 387. 



2 ) Zoology of New-York, or the New-York Fauna. Part. 6. Crustacea p. 39. 



3 ) Catal. Amph. Crust. Brit. Museum, p. 304. 

 *) See below. 



