6 C \ 



The fourth family CYLLOPODIDiE, C. BOVALLIUS, 1887. 



Diagll. Caput magnum, fere sphasricum. Oculi magni, totum caput oceupantes. Antennae primi paris 

 rectas, parti anteriori capitis affixas, fiagello tumido instructae; articulus primus flagelli pe- 

 magnus, articuli sequentes minutissimi, perpauci, terminales. Antenna? secundi paris fili- 

 formes, angulatai, parti inferiori capitis aftixa?. Instrumeuta oris masticatoria; mandibular 

 palpo instructs. Pedes pereii ambulatorii; pedes septimi paris trausformati. Pedes uri 

 ramis instructi. 



The head is large, almost globular. The eyes are large, occupying the whole head. The first 

 pair of antenna are straight, fixed at the anterior side of the head, provided with a tumid 

 flagellum; the first joint of the flagellum is very large, the following very minute and few 

 in number, terminal. The second pair are filiform, angulated, fixed at the inferior side of 

 the head. The mouth-organs are adapted for mastication; the mandibles are provided with 

 a palp. The pereiopoda are walking legs; the seventh pair are transformed. The uropoda, 

 are provided with rami. 



Syn. 1887. (Jyllopodida, C. BOVALLIUS. »Systematical list of. the Ampliipoda Hyperiidea». Bih. t. K. Sv. 



Vet. Ak. Handl. Bd. 11. N:o 16, p. 11. 



Among all the Hyperiidean families drawn up in this treatise the Vibilidce and the 

 Cyllopodida? are the closest related to one another, at least according to my apprehension. 

 They show such a similarity in habitual character that I should not hesitate to unite them 

 in the same family as two sub-families, if it was not for keeping up the congruity of the 

 system. Their points of difference are namely the two essential characteristics: the form 

 of the head with the development of the eyes, and the situation of the second pair of 

 antennas. In all other respects the likeness between them is very striking. At first 

 view the first pair of antenna; seem to have a neatly characteristical form but a closer 

 examination shows that in the young animals, especially in the young females, the resem- 

 blance is very great to those organs in the Vibilidce. Also the form of the first two 

 pairs of pereiopoda is almost identical, and even the other pairs of pereiopoda show a great 

 correspondance. The dactylus of the seventh pair is transformed exactly in the same man- 

 ner as in the Vibilidce. 



The animals belonging to this family seem to have a southern distribution and their 

 principal centre, according to the material I have examined and to the notices picked up 

 in the literature, is the southern coasts of the American continent. 



