KONGL. SV. VET. AKADEMUiNS JlANDLJNliAU. liANl). 22. N:() 7. 



219 



16. HYPERIA DAN^, „ n. 



The luiiue given in lioiiour ol' rrofcssor .J. D. Dana. 



Ilyperia Dance. 



Facsimilc from Dana. U. S. Expl. Exp. Crust. II, pl. 67, iig. 10. 



Kg. 1. TLe aniinal from tlie side. 2. The seoond pair of peraeopoda. 3. The iirus. 



Diagn. Caput permagnum, infra rotundatuni, segmentis tribus primis peraei paullo longius. Segmeuta 

 tria pi-ima perai coalita, cetei-a libera. Carpus pedum perai primi pari.s dilatatus ac pro- 

 doctus, margo anterior processus carpalis dimidio marginis posterioris metacarpi brevior. 

 Carpus pedum secundi paris productus, margo anterior processus carpalis dimidio margiuis 

 posterioris metacarpi paullo longior. Metacarpus pedum primi et secundi parium spinam 

 singulam margini anteriori affixam gerens; dactylus mediocris. Pedes tertii ac quarti pa- 

 rium pedibus parium diiorum pra3cedentium paullo longiores; carpus non tumidus, spinis 

 destitutus; metacarpus carpo vix angustior. Pedes parium trium ultimorum duobus praice- 

 dentibus longiores; pedes septimi paris jjedibus quinti ac sexti parium longiores; femur 

 pedum septimi paris latum; carpus tibia non brevior; dactylus longus. Latera segmentorum 

 plei post rotundata. Segmentum secundum uri liberum(?). Pedunculus piedum uri ultimi 

 paris plus quam duplo longior quam latior, ac ramo interno ter longior. Telson latius quani 

 longius, segmento tertio uri paullo brevius, j^edunculo pedum uri ultimi paris latius, ac di- 

 midio pedunculi ejusdem brevius. 



The head is \erj large, rounded below, and a little longer than the first tliree perffional seg- 

 ments. The first three segments of the pjerceon are coalesced, the following are free. The 

 carpus of the first pair of pjerceopoda is dilated and produced; the front side of the carpal 

 process is shorter than half the hind margin of the metacarpus. The carpus of the second 

 pair is produced; the front side of the carpal process is a little more than half as long as the 

 hind margin of the metacarpus. The metacarpus of the first and second pairs has a single 

 bristle on the front margin; the dactylus is moderately long. The third and fourth jjairs are 

 a little longer than the first and second; the carpus is not tumid, and without bristles; the 



