G (I I! IKS. 



'2i)\ 



JEFFREYS' GOBY. 

 (iOBIUS JEFFKEVSII. 



Fig. (;8. 



Base of t/ie second t/iiisal Jin ahoiit ('([huI in Ifi/f/fl/ fa the pcdmiclr of the ftdl, the least depth of trhieh is (dmid 

 7 % of the leiif/fh of the liodj/. Kjies snpeyiinlji oidi/ slifjhtl/i scpaiated from each other, their lonfjifudinal dia- 

 meter lieiiifi alidut HO % of the lei/r/th of the head. Ktmiber of sc(des in a nnr (done; the sides of the tjodi/ alxntt 

 28, and in a transverse ran- at the licf/inninf/ of the an<d fn (dnad (!. Forehead and oeeiput naked, throat in froid 

 of the rentral fns seedy. Six or fee rai/s in the frsf dorsal fn, the second rai/ lieinq elongated in the male. 

 Fannel formed hi/ the rentral fns c(in//iliic. Candal fn somen-liat pointed. Ground-colour of the hody yreenish 



jiellon', a'ith fee hlacl: spots in a roic alonf/ the middle of the sides. 



Fig'. 68. Gohiiis Jefrei/sii. Hnugesiind (Norway), W. Lilljeborg, luagn. 2 diaiii. Speciiricn belonging to Upsala Miisetiin. 



n. (5) 6^: ^. -^: p. 10 1. 17: V. '.- ; U. .c + 11 ( + 1) + .r; 

 L. lat. C'irc. 28. 



S)/ij. Gobiiis Jeffreijsii, Gthr, Ann. Mag. Nat. Hist., ser. 3, vol. 20, 

 p. 290, tab. V, fig. C; ser. 4. vol. 13 (1874). p. 139; 

 Coll.. Forli. Vid. Selsk. Christ. 1874, p. 159; ibid., Til- 

 l»gsh., p. 54; LiLLJ., &v., JS'org. Fislc, vol. I, p. 587. 

 Gobius quadrimamlattts, Day, Fish. Gt. Brit., Irel., vol. I, 

 p. 168, tab. LIII, fig. 2 (nee Risso, Canestrini, cett.?). 



Jeffreys' Goby, with it.i Ijody of fairly uniform 

 depth, but still elongated and laterally eompressed in 

 the caudal part, is ranged by the .scales on the throat 

 (the front part of the belly) as an intermediate form 

 between the preceding species and the following one. 

 Its other chief distinctions are the large scales, the de- 

 pression of tlie head in typical specimens and the some- 

 what sharpl}' upturned eyes. Both nostrils on each 

 side of the snout are surrounded b\- a raised margin 

 and set in a swelling common to them both, just in 

 front of the middle of the anterior mai'gin of the eye. 



Ju.st behind them ;ind nearer the middle of the snout 

 lies a large ])ore belonging to the supraorbital ])ranch 

 of the system of the lateral line, which is furnished 

 with other similar pores behind the eyes and in the 

 temporal line on the parietal bones. The length of the 

 lower jaw (about 10' „ % of the length of the body 

 and 45 % of that of the head) is apparently greater 

 than in our other small Gobies, and is distinctly more 

 than ' 3 of the distance between the beginning of the 

 first dorsal fin and the tip of the snout. In this last 

 respect Jeffreys' Goby corresponds to Gohius niger and 

 Gol). Friesii, but even here we find intermediate forms, 

 such as those taken by Theei, and Tkybom at a depth 

 of from 10 to 17 fathoms, on Lilla Middelgrund (a sand- 

 bank in the Cattegat), among them being a specimen 

 with 7 rays in the first dorsal tin". These forms may 

 be referred with about equal justice to Gohius flavcscens, 

 Goh. Jefi'reysii or Goh. minutus, unless we choose to 

 follow the method hitlierto adopted, and found new 

 species on such examples'". 



" In the specimen (>f Gobiiis .Jefrei/Mi taken bv Lii.i,.it:Bon(, at Ilaiigesiind. tliere are oidy 5 rays in tlic first dorsal fin, this being 

 due to the stunted development of the last ray. 



' Day lias established one such species under tlie name of Gol'iii.< I'ariwlh' (Fish. Gt. Jii-it.. IrcL. vol. I, p. 167, plate LIl, fig. 5). 



