Farkan — Seventh Report on the Fishes of the Irish A tlantic Slope. \ 39 



The following table gives the measurements of the types of the two species 

 of the genus in millimetres, with the proportions they bear to the lengths of 

 the body and head respectively : — 







L. PlNNATHS.* 



L 



,. BRAOHV COLDS. 



Length without caui'kij 



120 



800 p.c. of head. 



232 



560 p.c. of head. 



„ to origin of dorsal fin, 



15 



12 • 5 p.c. of length. 



45 



19 p.c. of length. 



„ „ „ anal fin, 



39 



32-5 „ „ „ 



94 



40 „ „ „ 



Height at pectorals, 



13 (11)* 



■11(9) „ „ „ 



33 



14 „ „ J, 



„ ,, anus, 



8(7)* 



6-6(6),, „ „ 



21-5 



^ » JJ J7 



Breadth at pectorals, 



4 



27 p.c. of head. 



IS 



43 p.c. of head. 



„ „ anus, 



3 



20 „ „ „ 



11 



97 



Length of head, 



15 



12 ■ 5 p.c. of length. 



41-5 



18 p.c. of length. 



„ „ snout, 



3d 



23 p.c. of head. 



12 



29 p.c. of head. 



„ „ eye, 



5 



33 „ „ „ 



10-5 



^'^ >j ;j jy 



Inter-orbital width, 



3 



20 „ „ „ 



13 



'^l jj jt jj 



Breadth of head, 



5 



•^3 „ J, „ 



13 



^^ JJ IJ !J 



Length of pectorals, ... 



27 (16)* 



ISO (107) p.c. of head. 



26 





„ „ ventrals, 



8(3-5)* 



53 (23) „ „ „ 



17 



41 tj jj jj 



These measurements show that Z. bmrhi/colus may be, at comparable sizes, 

 a stouter fish than Z. pinmitus, and has certainly a comparatively longer head 

 and abdomen and shorter caudal region. In the former species the head is 

 contained about 5 5 and the distance to the origin of the anal fin about 2^ times 

 in the total length, while in the latter the proportions borne by these 

 measurements are 8 and 3 respectively. These differences cannot be wholly 

 accounted for by the difference in size and stage of growth, and are, in fact, in 

 some particular's in a direction contiury to the usual change of developmental 

 proportion. 



A further distinction lies in the much longer pectoral fins of L. iminatus ; 

 while both specimens are too large to be affected by the great development of 



* The type of L. pinnatus is not in a particularly good state of preservation, and 

 measurements taken from it must not be regarded as necessarily accurately representing 

 its dimensions when in the flesh ; a careful comparison with Giinther's figure seems, how- 

 ever, to show that, excepting that the original form was somewhat 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 by Giinther's figure 

 and by the type differ in any material degree, our table shows both measurements, those 

 taken from the actual specimen being given in brackets. — [E. W. L. H. and L. W. B.] 



