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



described tlie male only of 0. ■<•■/// ricofa, for it has been frequently noticed, both by Professor 

 Hutton and myself, that males are extremely rare," but in fact, thouc;h the B. M. C. only 

 describes the male, Dana's description is of tlie female, and the male form of uncertain 

 habitat, of which he apjiends a description, is left doubtful between Orchestia si/?ricola and 

 Orehestia tenuis : Orchestia spinipahna; Orchestia taint ensis, taken, "at fifteen hundred feet 

 elevation, on the Island of Tahiti, several miles from the sea," must be transferred back to 

 the name Orchestia rectimana under which it was originally published ; Orchestia dispar : 

 Orchestia quadrimana; Orchestia hawaiensis; Orchestiapickerinr/ii. To the genus AHorcheste^s 

 thirteen species are assigned, of which (witli one exception) the true generic position remains 

 uncertain, as no information is given as to the telson ; the specific names are "1. Gaimanlii? 

 (Edw.), D.," in place of compi-essa, Dana, the doubtful corieetion being accepted as certain 

 iu the B. M. C. ; Dana says, "the description by Edwards agrees with our specimens in most 

 points, though dittering iu making the posterior stylets end in two rudimentary branches, 

 instead of one," a critical point on wluch the B. M. C. gives no information ; 2. verticillata, 

 to which AUorchestes pertwiana, Dana, is referred as " female of A. verticillata ?," the 

 suggestion being here made that Kr0yer's Orehestia grawUcomis from Valparaiso is an 

 AUorchestes near to verticillata; 3. hirtipalma : 4. gracilis; 5. humilis, "female?;" 

 6. australis ; 7. Irericornis'; 8. novi-zealandix, the male of which had been originally 

 described as a separate species under the name intrepida; 9. orientcdis; 10. Allorcliestes (?) 

 graminea, called AUorchestes gramineus in the B. M. C, which omits the important 

 observation made by Dana, " the reniform eye of this species leads me to doubt the 

 correctness of arranging it with the AUorchestes, and as I made no dissection, I am not sure 

 that its mandible has no palpus, or that its posterior stylets are simple ; " 11. media, changed 

 into medius in the B. M. C. ; 12. "Hawaiensis;" 13. '^ Fuyettensis." Since Jlr. Faxon 

 has ascertained that in AUorchestes media the telson is cleft, this species should, according 

 to Mr. Faxon's view, be called Nicea Dwdia, but, according to my view, Hijale media. 

 In Fam. V. Gammaridw, Subfam. 2. Lysianassiiiae, begins with the species " Lysiaiiassa ? 

 Brasiliensis," which from the character of the lower antenna? is no doubt described from a 

 male specimen, but of -what genus there is no decisive evidence ; the next species Lijsianassa 

 nasitta is likewise of doubtful genus ; Urisies gigas, as Sjience Bate has pointed out, is founded 

 on a confusion, the first perseopod having been described as the second gnathopod ; the 

 .species has not yet been assigned to any definite position, which the descrijition of the 

 mandibles "with a pointed dentate apex," the abdomen ending " in an oblong seventh joint" 

 and "the antepenult segment of abdomen acute behind "ought to find for it; " Aiiom/.r 

 Fuegiensis," having been originally called Stenia magellanica, must receive the name Anon//j- 

 magellanicus ; Unithoe rostrafns is changed by Boeck into Phoxus rostratus, leaving the 

 next species Urotho'i irrostratus, as the type of the genus. Subfam. 3. Leucothoina*, 

 contains Stenothoe validus. In subfam. 4. Gammarinae, Dana places Iphimedia simplex, in 

 the B. M. C. renamed Atijlus simplex; Iphimedia nadosa, which according to Dana "is 

 allied to the Acantliosovia hijstrix nf Owen;" Iphimedia jissicaiula, which he had previously 

 called Ampihithoe Jissicauda, and which the B. M. C. renames Atijlus fissicauda ; Iphimedia 

 capensis, of which he says, " this species is very near the Gammariis Otlionis, Edwards, but 

 there is no appendage to the superior antennfe," and which in the E. M. C. is called Af//liis 

 capends; Iphiniedia pugettensis, which the B. M. C. sets in a new genus Graijia, with only 

 one other species, called Grayia imhricata, this latter being probably the young nf 

 Amafhilla homari, Fabr. ; Dana's Iphimedia pugettensis should in my opinion be called 

 Pleustes pugettensis ,■ (Edicerus noci-zealandix, in the B. M. C. called CEdicerus 7iovx- 

 zealandix, with the appended remark that, " Grayia Pugettensis may belong to this genus 

 (certainly not to fyhimedia) " ; the name is again altered by Thomson and Chilton into 

 fJSilicerus neo-nel aniens ; to Amphifho'e Dana assigns seven species, rubella, orieid(dis, 



