26 CARL BOVAMJUS, AMriIII'onA HYfEKIIDK.A. 



longiores; feniiir ante leve, post spinulosc serratuin, articulis tribiis sef|nentibu.s iniilto hrevius, 

 spinam curvatain, hiciispidatam, genii liaiid loiigioreni gerens; tibia carpo niulfo longior; 

 carptis nietaoarpo loiigii)!'. l^edex septiini paris diinidio pcduni quiiiti pari.s paullo breviores; 

 dactyli eju.sdeni paris peduiundati. S(!gnienta iiri duo idtiiiia (Mjalita. Peden nri augusti 

 parce serrati; raiui externi elongati augusti, in tertio [jari diiuidium pedunculi paullo 

 superantes. Rami interni pvimi paris pedunculis longiores, secundi et tertii parium 

 peduneulis paullo breviores. Tehon triangulare. 



The hod)i is not keeled. The liead is a little deeper thaii long, with two indistinct divergent 

 keels on the upper side. The first paii- of antemice are a little shorter than half the body. 

 The feniora oF the first four pairs of pereiopoda are narrow. The fifth pair are longer 

 than the sixth; the anterior margin of the femur is smooth, the posterior spinously serrated; 

 it is much shorter than the three following joints together; the apical spine-like process is 

 bifid, curved, not longer than the genu; the tibia is much longer than the carpus; the 

 carpus is longer than the metacarpus. The seventh pair are a little shorter than half the 

 length of the fifth pair; the dactyli of the seventh pair are pedunculated. The last two 

 iiral segments are coalesced. The uropoda are narrow, sparingly serrated, the exteriör 

 rami long, narrow; those of the third pair, a little longer than half the peduncles. The 

 interiör rami of the first pair are longer than the peduncles; those of the second and 

 third pairs are a little shorter than the peduncles. The telson is triangulär. 



Colour. White with red spöts on the legs. 



Length. 5,5 mm., without antennas 4 mm. 



Hab. The Pacific, at Corinto, Nicaragua. Captured by the author in 1882. (S. M.). 



Syn. 18^7. 7'//?'o padfica, c. HOVALIJUS. »Systemntical list of the Ampliipoda Hyperiidea». Bih. t. K. 



Sv. Vet. Ak. Halldi. Bd. 11. N:o 16, p. 4. 



This species is very closely allied to Tyro TuUbergi, and onght perhaps to be regarded 

 only a.s a variety of it; however there being inany, if not very important, differences, I give it 

 preliminavily, though with .some hesitation, as a species of its own. Only the feraale is known. 



Tlie body is sinooth and even, not keeled or marginated. 



The head is trnncated anteriorly. 



The flagellum of the first pair of antennce is two-jointod, five times longer than the 

 peduncle. 



The "pereion is not marginated; the second pereional segment is as long as the first. 

 The last three segments are almost as long as the three preceding together. 



The carpi of the yirs^ two pairs of pereiopoda (Pl. III, fig. 11) are longer than the carpi. 



The third and fourth pairs (Pk III, tig. 12) with the tibite as long as the carpi. 



The femur of the fifth pair (Pl. III, fig. 13) has the apical process bifid, the anterior 

 spine is much shorter and more slender than the posterior; the carpus \k dilated and a 

 little tumid; the dactylus scai-cely a fourth of the metacarpus. 



The sidih pair (Pl. III, tig. 14) with the carpus and the metacarpus a little turaid. 



The seventh pair (Pl. Ill, lig. 15) are quite as long as the femur of the fifth pair; 

 the tibia and the carpus are a little tumid; the metacarpus is shorter than the carpus. 

 The dactylus as in the preceding species (Pl. III, fig. 16). 



