a neio Species of Lycoiuis. 



425 



formula heliiiul pectorals apparently ea. G/ca. 15. Lateral 

 line indefinite posteriorly. 



Coloration in lite silvery, after preservation greyish brown, 

 with the head, vent, and marj^inal fins darker. 



Length of the type 237 nnn. (2152 nun. without the caudal 

 ray -^j . 



Hah. North-east Atlantic, off tlie south-\v3st of Ireland, 

 circa 750 fatlionis. 



The following table gives the measurements of the types 

 of the two species in millimetres, with the proportions tliey 

 boar to the lengths of the body and head respectively : — 



L. I'INXATUS * . 



L. BRACllYCOLUS. 



Length witlioiit caudal 



,. toerigiiidf dorsal fin 



,, ,, aniil fin . 



Hfiglit at pectorals 



,, anus 



Breadtli at ))col orals 



,, anus 



Length of head 



„ snout 



„ eye 



Intcrorbital width 



Breadth of head 



Length of pectorals , 



„ ventrals 



120 

 15 



39 



13(11)* 

 8(7)* 



4 



3 



15 

 3-5 



5 



3 



5 

 27 (16) * 

 8(3-5)* 



800 p. c. of head. 



12-5 p. c. of length. 



32-5 „ 



11 (9) „ 



6-6 (6) „ 



27 p. c. of bead. 



20 „ 



12-5 p. 



23 p. c 



33 „ 



20 „ 



33 „ 



180(107) p. c. of head. 



53 (23) „ 



c. of length, 

 of head. 



232 

 45 

 94 

 33 



21-5 

 18 

 11 



41-5 

 12 



10-5 

 13 

 13 

 26 

 17 



560 p. 

 19 p. c. 



40 „ 

 14 ,, 



9 ., 

 43 p. c. 

 27 „ 

 18 p. c. 

 29 p. c, 

 25 „ 

 31 „ 

 31 „ 

 ()2 „ 



41 „ 



c. of head. 



of lenglh. 



of head. 



of length, 

 of head. 



These measurements show that L. hrachycolus may be, at 

 comparable sizes, a stouter fish than L. brevipinnis, and has 

 certainly a comparatively longer head and abdomen and 

 shorter caudal region. In the former species the head is 

 contained about 5^ and the distance to the origin of the anal 

 fin aLout 2i times in the total length, while in the latter the 

 proportions borne by these measurements are 8 and 3 respec- 

 tively. These differences cannot be wholly accounted for by 

 the difference in size and stage of growth, and are, in fact, in 



* The type of L. jmiuatus is uot in a particularly good state of preserva- 

 tion, and nieasuremi'nts taken from it must not be regarded as necessarily 

 accurately representing its dimensions while in the flesh ; a careful 

 comparison with (liinther's figure seems, however, to show that, excepting 

 that the original form was semewliat deeper in the body and that the 

 pectorals and ventrals (as their present state indicates) have been broken, 

 the distortion is not very great. Where the measurements shown bv 

 Giinther's figure and by the type ditler in any material degree, our table 

 shows both measurements, those taken from the actual specimen being 

 given iu brackets. 



