REPORT ON THE AMPHIPODA. 257 



."pinosix nee ruIfnfornul)U.o, infenluui mults." G. 3. riafopliium, TtSi-na.. — " Corpus superne 

 visum subellipticum, abdomine bene inflexo. Antennae flagello brevi sajpe^instructae, inferiores 

 lonniores, supei'iores appendiculataj. Pedes Imi 2dique subchelati, 2dis validioribus. 

 Pedes 10 postici mediocres." G. 4. Cijrtophiiim, Dana. " Platophio similis. Antennie 

 superiores non appondiculat.T3." 3. Styli caudales otii parvuli, biramei, ramo extertw non 

 uncinato, 3di Imique ramis extiis non prxcipue spinosis nee cultriformibus." G. 5. 

 Uncioln, Say. " 4. Sti/K raiidales Stii 2^aulo elnngati, biramei, ramo externa uncinato." 

 G. 6. Podocerus, Leach. — "Pedes Imi 2dique subchelati, 2dis validioribus. Antenna? 

 superiores breviores, non appendiculataj. [An maris digitus 2dus interdum 2-articulatus 

 Krdyero teste.]." In a note he observes, " Jassa of Leach may without inconvenience be 

 united to Podocerus, as there is no essential generic difference between them." The same 

 remark has been appHed by later writers to the next genus, G. 7. Cratopldum, Dana, 

 "Pedes Imi 2dique subchelati, 2dis validioribus. Antennae superiores breviores, 

 appendiculatre." " B. Digitus 2dus 2-articulatu.<!. " G. 8. Cerapu^, Say. "Antennte 

 pediformes, subseqUcB, flagellis carentes. Pedes Imi 2dique prehensiles, Imis parvulis, 

 2dis manu bene confectis. Styli caudales 3tii biramei, ramis subsequis, longiusculis. 

 [Tubum membranaceum inhabitat]," in which definition the account of the third uropods 

 is rather to be remarked than accepted ; G. 9. " Cerapodina, Edw. (Cerapux, Templeton) ;" 

 G. 10. Erichtlionius, Edw. 



Subfam. 3. Icilinas. " Antennfe non pediformes nee subpediformes, flagelUs sat longis basique 

 sat brevi instructaj. Styli caudales ac in Corophiiiig." G. 1. Icilius, Dana. Pedes toti 

 unguiculati et tenues, 4 antici longi, non prehensiles, ciliati, 10 postici fere similes. 

 Antenna superiores breviores non appendiculatc-e." G. 2. Pferi/gocera, Latr. 



Fam. IV. Orchestidfe, is introduced with the note : — " The author gives a different arrangement 

 of the species of Orchestidse from that published in this Journal, [2], viii, 135 and ix, 29.5, 

 and rejects the genus Talitronus, there instituted. He follows Fr. Jliiller (Archiv f. Nat., 

 1848, 53) in considering the Talitri and Orchestise as forming a single genus, his recent 

 investigations confirmiug this view. The Gammaridaj also are rearranged." He then gives 



"G. 1. Orchestia. — Maxilhpedes non unguiculati. Antenna; 1ms basi 2darum breviores. 

 Epimerse 5tae 4tis parce breviores. 



"Subgen. 1. Talitrus. — Pedes Imi mans feminxce manu non instructi. 



"Subcen. 2. Talorchestia, D. — Pedes Imi maris ac in Talitro, feminx manu parvula instructi. 



"Subgen. 3. Orchestia. — Pedes Imi maris feminxque manu plus minusve instmcti. 



"G. 2. AUorchestes, Dana. — Maxillipedes unguiculati. Antenna Imaa minores, basi 2darum 

 longiores. Epimerse 5t8e 4tis ssepius multo breviores." On the three subgenera see the 

 following note. In the proposed arrangement the older name Talifr>is should have been 

 assigned to the genus, rather than Orrhesfia. 



Fam. V. Gammaridse, contains — 



Subfam. 1. Stegocephalins. G. 1. Steijoceplialus, Kriiyer. 



Subfam. 2. Lysianassinse. G. 1. Lysianassa, Edw.; G. 2. Pldias, Guerin ; G. 3. Opis, 

 Krbyer; G. 4. Uristes, Dana, with a reference to " Amer. J. Sc. [2], viii, 135. The genus 

 Stenia is rejected;" G. 5. Anony.r,\i.x6y&x; G. 6. Urothnt; Dana, "Epimera; permagnae, 

 Otis parvis. Antennae Imse breviores, appendiculatee, basi sat elongato. Styli caudales 

 postici longi, biramei, ramis foliaceis, ciliatis. Mandibulae palpo 3-articulato." 



Subfam. 3. Leucothoinse. — "Antennfe superiores basi plus minusve gi-aciles. MaxUlipedes 

 elongati, angusti, articulo longo unguiformi confecti, lamelli.': iniernis jKrbredlius. 

 Inland ibula? sive palpigerse sive non palpigerse, processu molari carentes. [An semper 1] 

 Epimerse magnae." G. 1. Stvnotlioe, Dana, " Epimerie permagnse, 4tse maximae, 5ta> 

 parvul*. Pedes 4 antici subchelati, 2Jis validioribus. Antennw superiores longiores, non 

 appendiculatae. Mandibute non pal pigerx, processu molari carejites. Styli caudales Imi 

 (ZOOL. CHALL. EXP.— PART LXVII. — 1887.) Xxx 33 



