(iPlllDllilDS. 



GOl 



FIEl!ASFEi: I)EXTATUS. 



Fi.^. 145. 



Anunif/ the antry'ior jair-tecili ire tiiid a pa/r ar tiro of riirrcd raiiincs hotli in the iijipcr jair and the loiror. 

 Length of thr pccfarid fiis ',, t/iaf of tlir livad. /rlihli in adidt spccimevs mt'dsnri's nlioiit 10^ „ % of thnt of the 

 liodij. (ireatest depth of the body {Just behind the head) somewhat less than ','2 {4C — 4.ti %) of the length of the 

 head, irhich is less than the distance betireen the rent and the tip of the snout {diirinf/ youth "'s to Vi> '« old 

 specimens " ,, thereof). Lonqitndinid diameter of' the orbits about '/, of the lenqth of the loirer ,/air, irhiah is 

 more than half (about .')(,' %) of the length of the head, but less than half (about 4') "«) of the distance betireen 

 the rent and the tip of the snout. I'ostorbitid leni/th of tlie head abiad 70 % of the entire loigth of the same. 

 Height of the anal fn, irhich begins just behind the vent and somewhat behind' or ferticulli/ below the beginning 

 of the dorsal fin, greater at the middle of its length than either the height of the dorsal Jiu or the depth of the 

 bod;/ at this point, but someirhat less than the greatest deptli of the bmJg. The abdominal cariti/ e.rtends behind 

 the rent for a distance about half as great again as that betireen the rent and the tip of the snout. Bodif trans- 

 parent, during life colourless, save for the whitish, brassy iris and the silvery abdominal cavity. 



Fig. 145. Fieyasfer deutatiis, natural size. Vrvm 100—200 fllinis. of water r.n the Jutland Reef. 

 Taken in 1880 by Fislierinan B. Westeiigken. 



/.'. /.)■. 7 : 1>. 



144 — 180: .4. ca 105 — 180; P. 16; 1". 0;C'. 0. 



&I/H. (Jpliidhon de/itatuin, Cuv. (subgen. Fierasfer), R'cgne Aniin., 



ed. 2, tome II, ji. 359; Gtiir (Fierasfer), Cat. Brit. Mits.. 



Fish., vol. IV, p. 383; Couch, Fish. Brit. IsL, vol. Ill, p. 



133, tab. C'LVI; Putnam (Echiodon), Proc. Boston Soc. Nat. 



Hist., vol. XVI, p. 34G; GiGU. {Fierasfer), Espos. Intern. 



Pesca, Berl. 1880, Sez. Ital., Cat., p. 97; Emery, .\tti Accad. 



Line., scr. Ill, Mem. CI. So. Fis., Math., Natur. vol. VII. 



p. 183, tab. I, cett.; Ip., Fn., Fl. Golf. Neapel, II, p. lU, 



lab. I, cett.; Day, Fisli. Gt. Brit., Irel., vol. I, p. 328; 



Coll., Forh. Vid. Selsk. Christ. 1882, No. 19, p. 3 cum tab.; 



LiLLJ., Su., Norg. FisL, vol. 11, p. 234. 

 Ecliiodon Drummondii, Thomps., Trans. Zool. Soc. Lend., vol. 



II, p. 207, tab. XXXVIII. 

 Enclieliopliis tenuis, Putsam (larva) 1. c, p. 347. 



Ill Scandiiiavi;i a.s evcrywliere Fierasfer dentatus 

 is an extremely rare fish; and its habits, at least when 

 adult, are almost unknown. It was originally described 

 as a Mediterranean form, but even there it is seldom ob- 

 served. Emery saw oidy one adult specimen at Naples, 

 but he mentions at least tiiree larva^ which he procured 

 from Holotliuriie. (iicLiiii.i assigns this species to Naples, 

 Messina, and Venice. On the other hand, neither 

 Caxestkini, Mokeau, nor Steindaciiner mentions its 

 occurrence in tiie Mediterranean. In the Atlantic it 

 was first iiiet witli b^• Thomi'son, wiio received through 

 Drummoxi) a specimen "_'8 cm. (11 in.) long that had 



