KONGL. SV. VET. AKADEM1ENS HANDLINGAE. BAND 22. N:0 7. 319 



segmente ohne Grenzen verschmolzen. Vorderantennen des Weibchens zweigliedrig, relativ lang, hin- 

 tere Antennen mit Stachel. Das Mannchen mit dreigliedrigem Mandibeltaster. Zweites Gnatopoden- 

 paar dick und stark, mit vollkommener Scheere bewaffnet. Die fiinf nachfolgenden Beinpaare des 

 Thorax dtinn und langgestreckt, sammtlich mit schwacber langgezogener Greifliand endigend. Die 

 Uropodenaste schmal und griffelformig, fast so lang als das stilformig gestreckte Basalglied». 



Of these characteristics only that which refers to the cheliform hand in the last five 

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

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



The type species was Phronimopsis spinifera. 



Caeus in 1885 gave Claus' diagnosis translated in Latin. 



Geestaeckeb in 1886 gave a somewhat altered diagnosis. The following passage 

 may be quoted: 



» — — — Erstes Beinpaar kurz, mit gepinselter Endklaue, zweites kraftiger, mit zweifingriger 

 Scheere, die fiinf folgenden lang und dtinn, in eine schwache Greifhand endigend. Hinterleib schmal, 

 so lang wie der Vorderkorper». 



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 antenna?, 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» collection a 

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



He gave a new generic diagnosis, which runs: 



»Antennce of both pairs having multiarticulate flagella in the male, but not in the female. Man- 

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

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

 pods chelate. The Peroeopods slender, all narrowly subchelate. Uropods with long narrow peduncles 

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

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



Of these characteristics the first two 1 ) are valid for all the Hyperiidean 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 perajon being globularly inflated — or normal in form. 



2. The last three pergonal 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. 



