The fourth family CYLLOPODIDJ], C. BOVALLIUS, 1887. 



Diagn. Caput magnum, fere sphaericum. Oculi magni, totum caput occupantes. Antennce primi paris 

 rectai, parti anteriori capitis affixje, flagello tumido instructaj; articulus primus flagelli pe- 

 magnus, articuli sequentes minutissimi, perpauci, terminales. Antenns secvmdi paris fili- 

 formes, angulata?, parti inferiori capitis affixa?. Instruinenta oris masticatoria; mandibulie 

 palpo instructffi. Pedes pereii ambulatorii; pedes septimi paris transformati. Pedes uri 

 ramis instructi. 



The head is large, almost globular. Tbe eyes are lai-ge, occupying the whole head. The fii'st 

 pair of antennm are straight, fixed at the anterior side of the head, provided with a tiimid 

 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 moutli-organs are adapted for mastication: the mandibles are provided with 

 a palp. The i^ereiopoda are walking legs; the seventh pair are transformed. The uropoda 

 are provided with rami. 



Syn. 1887. Cyllopodidm, C. BOVALLIUS. MSystematical list of the Amphipoda 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 

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

 They show such a sirailarity 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 difterence 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 

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

 view the fii-st pair of antennte seem to have a neatly characteristical form but a closer 

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

 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 gi"eat 

 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 ihe material I have examined and to the notices picked up 

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



