KOXGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 22. N:0 7. 319 



segmente ohne Greiizen verschmolzen. Vorderantennen des Weibcliens zweigliedrig, relativ läng, hin- 

 tere Antennen mit Staehel. Das Milnnchen mit dreigliedrigem Mandibeltaster. Zweites (Jnatopoden- 

 paar diok und stark, mit vollkommener Sclieere bewaffnet. Die liinf nachfolgenden Beinpaare des 

 Thorax dimn imd langgestreckt, sämratlich mit schwacher langgezogener Greifliand endigend. Die 

 Uropodenäste scbmal und gritielturmig, fast so läng als das stilförmig gestreckte Basalgliud». 



Of these cjaai-acteristics only that ^\•hich refers to tlie cheliform hand in the last tive 

 pairs of peraeopoda, and, with some alteration, that which refers to the second pair, are 

 useful for generic distinction. He does not mention the peculiar structure of tlie second pair- 



The type species was Phroniinopsis spinifera. 



Caeus in 1885 gave Claus' diagnosis translated in Latin. 



Geestaecker in 1886 gav^ a someAvhat altered diagnosis. The following passage 

 may be quoted: 



» — — — Erstes Beinpaar kurz, mit gepinselter Endklavie, zweites kräftiger, mit zweifingriger 

 Scheere, die fiinf folgenden läng und diiun, in eine scbwache Greifhand endigend. Hinterleib schmal, 

 so läng wie der Vorderkörper». 



In 1887 I transferred the genus from Phronimidce to the family Hyperiidae, in 

 which Phronimopsis has its nearest relatives, while it has nothing, except the coalesced 

 epimerals, in common with the Phronimids. With the Hyperiidean genera it agrees in 

 the general form of body, in both pairs of antennas, in the mouth-organs, and in the 

 form of the urus and its appendages. At the same time I briefly described a new spe- 

 cies Phronimopsis Sarsi. 



In 1888 Stebbing accepted my views as to the systematical position of the genus, 

 placing it in the family Hyperiidae. He described from the »Challenger» coUection a 

 new species Phronimopsis tenella, which is very closely allied to Ph. Sarsi. 



He gave a new generic diagnosis, which runs: 



iiAntennm of both pairs having multiarticulate flagella in the male, biit not in the female. Man- 

 dihles with dentate cutting edge, a secondary plate on the left mandible, a molar tubercle, and, in 

 the male, a three-jointed palp. The First Gnatliopods simple, with hairy finger; the Second Gnatlio- 

 pods chelate. The Perceopods slender, all narrowly subchelate. Uropjods with long narrow peduncles 

 and narrowly lanceolate rami. Telson small. The Head short and deep; hranchial vesicles attached 

 to the second, third, and fourth pairs of perseopods». 



Of these characteristics the first tAvo^) are valid for all the Hypei-iidean genera; and 

 are thus, according to my views as to the systematization, family characteristics and not 

 generic. The following four are on the other hand good generic characteristics. The last 

 three seem to be of only specific value. 



For the specific distinction the following characteristics are here used: 



1. The pera?on being globularly inflated — or normal in form. 



2. The last three peraäonal segments, and all the pleonal, produced dorsally in the me- 



dian line into a short spine-like process, — or not produced. 



') With the addition that the three-jointed mandibular palp is present also in the female. 



