KONGL. SV. VET. AKADEMIENS IIANI1LTNf4AR. BAND. 22. N:0 7. 23 



The great discrepancies betwecii tlie genus Para]>hroiiiraa and the true Phronimce 

 made it indispensable to rernove it from the tamily Pkrimiinida'. and to establish for it a 

 faiuily of its own. Claus'), the founder of the genus, says himself, that Paraphroniina 

 difters in important eharacteristics from the other nierabers of the family Phroniwidcje, 

 and that it perhaps ought to be placed in the family Hyperiidce. It is however impossible 

 to introduce it in this latter fauiily, owing to the form of the antenme and the want of a 

 mandibular palp. 



In an earlier paper I ventured the supposition that Paraphronima might prove to 

 be identical with the genus Daira of H. Mii>ne Edwards and i hoped to obtaine corro- 

 boration for this supposition lately when Professor Alphonse Milne Edwards most 

 generously transmitted to me the precious coLlection of Hjq^erids from the »Musée d'Histoire 

 Naturelie». But unfortunately the type of the genus Daira, as well as the types of some 

 other critical genera and species founded by his illustrous father, had been destroyed by 

 accident. After further studies into the matter I fuUy admit that Stebring 1. c. is quite 

 right in his criticism of my above named supposition, and that Paraphronima and Daira 

 must be looked upon as two difterent genera. Nevertheless I think that the both genera 

 are very closely related. Thus retaining Daira as a genus of its own, only correcting 

 the name to Eudaira as Daira was preoccupied, I place it here in the family Para- 

 phronimidse. It is possible that also the genus Cyllias (see p. 20) ought to be placed 

 in this family. 



The family Paraphronimidie has probably its centre of distribution in the tropical 

 seas, some of its representants occur in the teraperate regions, but none is hitherto recor- 

 ded from the A re tio nor from the Antarctic regions. 



The family thus contains two genera viz. Paraphronima and Eudaira. 



A. The carpus of the second pair of perajopoda is narrow, not produced into a 



process 1. Paraphronima. 



B. The carpus of the second pair of perasopoda is broad, produced into a process, 



forming with the metacarpus a chela ._ _ 3, Eudaira. 



Genus 1. PARAPHRONIMA, CLAUS, 1879. 



Diagn. Corpus gracile, leviter compressuni, epimerLs obsoletis. Pede.n perdd primi paris carpuin dila- 

 tatum sed non productuin gerentes. Pedes secundi paris nietacarpuni angustuni, in apice 

 productum, gerentes. 



The hody is slender, a little compressed, the epimerals are obsolete. The first pair of 

 perceopoda have a broad but not produced carpus. The second pair have a narrow carpus, 

 and the metacarpus produced at the apex. 



') »Der Organismus der Phronimiden». Arb. Zool. Inst. der Universität Wien. Vol. 2, p. 66 (8). 



