G25 



Gems ORTHAGORISCUS. 



JUid)i rotDid or of a aliorf eU'iptirol fanii. Skin roii(/h with dense, fine spiries and papilla: Distance between the 

 dorsal fin and the tip of thv sniuit {in adult specimens) less than '/., of the length of the body. 



Tlie iinine oi' tliis genus", nccordini;- to lidNDici.irr's'' 

 iiitcr|)r('t;itioii of I^i.inv, is of classical (iriuiu and dciMNcd 

 tVciiii its jii)W(M- lit' |ir<)ducina- aTuiitinj;' sounds. Tlic 

 name \\as introduced by Scuneidki!'' into tlie post- 

 LiniiiViin nomenclature. Rondelet's contemporary Sal- 

 vi.vNus did not approve of his interjiretation, and gave 

 tlic Suntishes auotiicr name, Jlola (millstone), with re- 

 ference to the round form of the body and derived from 

 tin' po|iular language of Marseilles. This generic name 

 was adopted by Johnston'' and Wielugiiby', but in 

 LiXN^us it passed into a specific designation'^. 



Orthat/orisciis is distinguished from the other genus 



ti\ely considerable extent in the region of the caudal 

 tin, and iuxohes an elongation of the body that caiises 

 the apparent removal in a forward direction with age 

 of the dorsal and anal tins. The above-mentioned un- 

 certainty with regard to the distinction of the species 

 within this genus depends partly on our imjjerfect know- 

 ledge of the eai'lier stages of the development, partly 

 on a singular form of the caudal fin, with a ijointed 

 upper lobe, which has been observed both in younger 

 individuals (fig. 154, 11) and in older ones'', without 

 enabling us as jet to decide -ivhether it is of incidental 

 (individual) description or of some other signification. 



of the family not only by the different covering of the I In the Scandinavian fauna, however, this uncertainty 



Itody, but also by a special direction of development, 

 which brings about a secondary increase of compara- 



is of no importance. 



THE SHORT SUNFISH (stv. klumpfisken). 

 ORTHAGORISCUS MOLA. 



I'latc XXVII, fig. 4. 



Pectoral fins rounded in old specimens: their length at most about '/, (14 or 15 %) of that of the body. Colo- 

 ration bluish gray, on the back darker and brownish, growing lighter with a silvery lustre down the sides, 



on the hellii whitish. Fins brownish. 



-18' 



A. 15— n 



P. 11 — 13*: t". 0; U. 



n. /»: 6; D. 17- 

 11 — 14; rert. 16 /. 17. 

 ■St/ii. Ostracion catlietoplateus subrotundns inermis asper, pinnis pec- 



toralibus liorizontalibus, foraniinibus quatuor in capite, Art., 



Gen., p. 61; ,S,jn.. p. 83. 

 Tetraodou Mold. Lix., Syst. Nat., ed. X, Um. I. p. 334; 



Pall. {Diodoii), Spicil. Zool.. torn. I, fasc. VIII, p. 39, lab. 



IV, fig. 7; Retz. (Tetrodon),\e.X. Akad. Handl. 1785, p. 115, 



tab. IV; Bl. {Dindon), Naturg. Ausl. Fisch., pt. I, p. 75, 



tab. CXXVIII; Ketz. (Teirodon), Fit. Suec, Lin., p. 310; 



ScHN. (Orthagorisciis), I. c; NiLSS., Prodr. Iclith. Scand.. p. 



Ill: Wellenbergh, Observ. Anat. de 0. mola, disp. Lugd. 

 Bat. 1840; ScHLEG., Fn. Japan., Poiss., p. 288, tab. CXXVII; 

 Costa, Fii. Regn. Nap., Pesci, pt. 2, Plettogn. Gymnod., tab. 

 LXIII et LXIV; Ekstr., Gbgs. Vet., Vitt. Samh. Handl. 1850, 

 p. 40; Kr.. Damn. Fiske, vol. Ill, p. 732-, NiLSS., Sicand. 

 Fn.. Fisk:, p. 697; Cleland, Nat. Hist. Review 1862, p. 

 170, tab. V et VI; Gthr, Cat. Brit. Mus., Fish., vol. VIU, 

 p. 317; Coll., Vid. Selsk. Forb. Christ. 1874, Tilliegsli., 

 p. 203; ibid. 1879, No. 1, p. 101; N. Mag. Naturv. Christ., 

 Bd. 29 (1884), p. 114; Malm, Gbgs, Bofi. Fn., p. 599; 

 Winth., Naturh. Tidskr. Kbhvn, ser. 3, vol. XII, p. 54; MOR., 



Gill; thu 

 rotunda) 



OQ&aYOQia/.og, sucking-pig . 

 De Piscibus, lib. XV, cap. VII, p. 425. 

 iSyst. Icttthyol. Bloohii, posth., pp. LVII and 510. 



Uistoria naturalis de piscibus et cetis, lib. 1, tit. 1, cap. Ill, art. II, punct. VIII. 

 Historia Piscitim. lib. 4, sect. Ill, cap. VI, p. 151. 



CnviER is stated, it is true, in his anatomical lectures — in 1798, according to Steenstrup and LOtken, in tSOO, according to 

 s prior to the appearances of Schneider's work quoted above — to have advocated the resumption of .Mola as a generic name (Mola 



but in his systematic works he recognised Orthagoriscus. 



Monaco, Bull. Soc. Zool. Fr., tome XIV (1889), p. 17. 



Sometimes 16, according to KRevER and Moreau; sometimes as many as 20, according to Lilueborg. 



Sometimes 14, according to Steenstrup and LUtken; sometimes 18, according to Lilljeborg. 



Sometimes 14, according to Retzius. 



