KONGL. SV. VKT. AKADEMIENS HANDLINGAK. 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 TuLlbergi. 



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



The uropoda (Pl. III, p. 17); the first pair is tinely serrated along the outer margin 

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

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

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

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



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

 last pair of uropoda. 



The second family, LANCEOLID^, C. BOVALLIUS, 1887. 



Diagn. Caput parvum, curtuni, non tvimidum. Oculi parvi vel obsoleti. Avtennai prinii paris rectae, 

 parti anteriori capitis affixa?, flagello cuinpree-so instructa?, articiilus primus flagelli permag- 

 Diis, articiili sequentes parvi perpauci terininales. Antenna; secundi paris compressa? 

 non angulatro, parti anteriori capitis affixic. Tnstrumenta oris masticatoria, inandibulie 

 palpo instructa}. Pedes, peveii ambulatorii, pedes septinii paris non transformati. Pedes uri 

 ramis instructi. 



The liead is small, sliurt, uot tumiil. Tlie eyes are small ur indistinct. The first pair ot an- 

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

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

 compressed, not angulated, fixed at the anterior side of the head. The rnouth-organs are 

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

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



Syu. 1887. Laiiceolidw. 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 fäte of being neglected 

 from the very tirst moment thcy made their entrance into the zoological system. None of 

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

 about as a literary curiosity from one place to another in the carcinological sj^.stera. H. Milne 

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

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

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

 by subsequent authors. In 188.5*) I described some animals, which in my o])inion were 



') "Extrait de Recherches pour servir å THistoire naturelie des Crustacés araphipodes». Ann. Se. Nat. 

 Torne 20""= p. 387. 



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

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

 ■•) See below. 



