258 THE VOYAGE OF H.M.S. CHALLENGER. 



2iliqiie ramis bene subulati, 3tii simplicissimi, subulati, spina crassa confecti." G. 2. 

 Leunithne, Leach. — " Epimerce magmae., Stse parvulaj. Pedes 4 antici subchelati, 2dis 

 validioribus. Antennse superiores longiores, nou appendiculatae. Mandibulse palpigeraj. 

 Styli caudales toti biramei, ramis subulatis." 



"[Cujus sedis est Microcheles, Krciyer, Amphitlioe affinis, cui mandibulse processu molari 

 carentes : quoque Amphitlioe Marionis, Edw., cui mandibulae non palpigerae.]" 



Subfam. 4. Ganimarinse, with various divisions and subdivisions, contains G. L Acanfhrmofiig, 

 Owen; G. 2. AUbrotus, Edw.; G. 3. " Leptochirus," Zaddach; G. 4. IpMmedia, Rathke, 

 D. " Epimerfe magnse, 4t8e maximie, 5tis multo brevioribus et vix bilobatis. Stj'li 

 caudales postici ramis duobus oblongis consimilibus apice setigeris et non uncinatis instructi. 

 Antennae Imae ssepius breviores," with a note, " Dexamine of Leach, may perhaps be 

 included here," to which he adds that the genus Hijale of H. Rathke, contains no characters 

 in its description by this author which do not apply equally well to species of Iphimedia ; 

 G. 5. Oedicerus, Kroyer, " Iphimedix affinis ; " G. 6. Ampliithoe, Leach, D. " (includes 

 Plienisa of Leach)"; "Epimerse magnse, 5tre maximas, vix bilobatcB lobo posteriore 

 minimo. Styli caudales postici ramis duobus brevibus dissimilibus instructi, ramo externo 

 apice recurvatim bi-unclnato, interno compresso apice non spinuloso sed pilis parce ciliato. 

 Antennae Imae sjepissime longiores;" G. 7. Gammarns, Fabr. D., with notes upon Amafltia, 

 Rathke, and Euxirui<, Kroyer ; G. 8. Pliotis, Kroyer ; G. 9. Melifa, Leach, D. " Epimerae 

 5tae 4tis multo breviores (sic an semper?). Styli caudales uno ramo longo, sive 

 subcylindrico sive foliaceo, altero brevi vel obsoleto. [Digitus in manus latus sagpe 

 claudens]. Antennae Imre saepius longiores." To Photis and MeJita be assigns " Anfennx 

 Imx non appendiculaix," and then under "antennas Imae appendiculatae," he places G. 10. 

 Msera, Leach, D. — " Epimerae et styli caudales postici ac in Melifa." Under the heading 

 " Styli caudales postici simplicissimi, ramo uno brevi et rrndo, apice paulo refiexo et spinas 

 duos pei-hreves paulo exsertas gerente," he places G. 11. Dercotlwe, Dana. — " Epimerw 

 mediocres, 5tae bene bilobatae, 4tis saepius vix breviores. Pedes Imi 2dique digito uni- 

 articulato confecti"; G. 12. Pijctilus, Dana (Erirlithonius, Edw.?) — "Epimerse mediocres 

 vel breves corpore lineari, subdepresso. Antennae longae, flagellis sat longis. ISIanus lm» 

 articulis 4to 5toque saepe instructce, digito uni-articulato ; 2da! digito 2-articulato ; " 

 G. 13. "(An hujus sedis?) Pardalisca, Kroyer. He then gives in a separate section, G. 14. 

 Atylus, Leach; G. 15. Isclujrocerus, Kroyer. 



The second main division of the Gammaridae has "Pedes 10 postici partim prehensiles." 

 Subfam. 5. Pontoporinae. G. 1. Lepida^tylis, Say; G. 2. Pontipioreia, Kr.; G. 3. Ampe- 

 lisca, Kr.; G. 4. Protomedeia, Kr.; G. 5. Aora, Kr.; G. 6. Phoxus, Kr. Subfam. 6. 

 IsaeiuK. G. 1. Iseea, Edw.; G. 2. Anisopus, Templeton. He doubts whether Laphysfius, 

 Kroyer, belongs to the Isadnx or Coropliidx. 



Of " Subtribus III. Hyperidea," he says, " In the fii-st family of the Hyperidea, (the Hyperidx), 

 neither of the 5 posterior pairs of legs are subchelate, and the antennaj are not folded up 

 beneath the head or thorax. In the second (the Plironimidx), one or more of the 3 

 posterior pairs of legs are subchelate or much enlarged, apparently for grasping in coition, 

 and the antennae are as in the Hyperidae. The third family {the Typhidx), differs from both 

 the preceding in the concealment and folding of the inferior antennre beneath the head or 

 thorax, and in many of the species, the abdomen closes up against the venter. " 



The Hyperidea he arranges thus: — Fam. 1. Hyperidae. "Antennae 2dae exsertae. Abdomen 

 in ventrem se non fiectens. Pedes 5ti 6ti Tmique forma longitudineque mediocres, -Stis 

 6t\sque non percrassis nee prehensilibus." Subfam. 1. Vibilinae. G. 1. Vibilia, Edw. 

 Subfam. 2. Hyperinre. G. 1. Lestrigonus, Edw.; G. 2. Tyro, Edw.; G. 3. Hyperia, 

 Latr.; G. 4. Metoecus, Kroyer; G. 5. Tauria, Dana, "Antennas ac in Hyperia. Pedes 

 2di non prehensUes, articulo 4to apice inferiore non espanso nee producto"; G. 6. Daira, 



