KONGL. SV. VET. AKADEMIENS HANDLINGAH. BAND. 22. N:0 7. 



191 



of the flagellum as long as the peduncle, tapering: inferior pair rather longer than the superior. 

 First pair of gnathopoda having the carpus inferiorly advanced to quite half the length of the 

 propodos; dactylos short: second pair closely reseinhling the first. Pereiopoda subequal; poste- 

 rior pair having the basos nearly rectangular, the infero-posterior distal angle subacute. Penul- 

 timate pair of pleopoda longer than the preceding and nearly as long as the ultimate; ultimate 

 pair having the peduncle three times as long as the telson, and not serrated upon the interior 

 distal margin. Telson lanceolate. •> 



Diagn. 



7. HYPERIA SPINIOERA, n. sp. 



PI. X, fig. 33—39. 



Caput curtum, latum, segmenta duo priora perau longitudine aequans. Segmenta omnia pertei 

 libera. Carpus pedum pero&i primi paris dilatatus, paullo productus; margo posterior 

 vix vel indistincte incisus, spinis validis instructus. Cai'pus pedum secundi paris productus; 

 margo anterior processus carpalis dimidium marginis posterioris metacarpi longitudine fere 

 aequans. Metacarpus pedum primi et secundi parium spinis validis parce instructus; margo 

 posterior incisus, spinigerus, minute serratus; dactylus longus. Pedes tertii ac quarti 

 parium pedibus parium duorum praacedentium paullo longiores, spinis destituti. Pedes 

 parium trium ultimorum duobus prascedentibus non longiores; carpus pedum quinti paris 

 tibia brevior, non serratus, sed capillis brevissimis fimbriates. Latera segmentorum plei 

 post rotundata. Pedunculus pedum uri ultimi paris duplo longius quam latius. Telson 

 longius quam latius, segmento ultimo uri brevius, pedunculum pedum uri ultimi paris lati- 

 tudine fere aequans, sed dimidio pedunculi ejusdem longius. 



The head is short and broad, as long as the first two pergonal segments together. All the 

 pergonal segments are free. The carpus of the first pair of perwopoda is dilated, somewhat 

 produced; the hind margin is scarcely notched, provided with strong spines. The carpus 

 of the second pair is produced; the front margin of the carpal process is produced and is 

 almost half as long as the hind margin of the metacarpus. The metacarpus of the first 

 two pairs is sparingly set with strong spines; the hind margin is notched and minutely 

 serrated, each notch carrying a spine; the dactylus is long. The third and fourth pairs 

 are only a little longer than the two preceding pairs, and without spines. The last three 

 pairs are not longer than the third and fourth pairs; the carpus of the fifth pair is shorter 

 than the tibia, not serrated but fringed with very short hairs. The lateral parts of the 

 pleonal segments are rounded. The peduncle of the last pair of uropoda is twice as long- 

 as broad. The telson is longer than broad, and shorter than the last ural segment; it is 

 almost as broad as the peduncle of the last pair of uropoda, but more than half as long- 

 as the same peduncle. 



Colour. Yellowish. 



Length. 12—22 mm. 



Hah The Arctic region: Spitzbergen, off the Northern coast of Norway. The Northern tem- 



perate region: 



off the South coast of England. 



(D. M.; F. M.; S. M.) 



