18 
RAGOLLE ST: M.-N. KI. 
Compared with this species, the difference is, mainly, the following: 
L. muraena is more elongated than L. sarszz, the height of the body 
being contained from 20 to 22 times in its total length. 
In Z. muraena the dorsal rises comparatively more to the front (or 
1/2 head’s length from the branchial cleft; in Z. sarszz */4 head’s length). 
Its distance from the end of the snout is, in Z. muraena, thus contained 
about 51/2 times in the total length of the body, and in Z. sarsti about 
41/2 times. Moreover, whilst the branchial cleft in the former species is 
situated half way between the commencement of the dorsal and the hind 
margin of the eye, in Z. sarsiz it is situated half way between the dorsal 
and the front margin of the eye. 
In Z. muraena the mouth is smaller than in /. sarsii, and is contained 
36 times in the total length of the body, whilst in the latter species (the 
developed individuals), not more than 20 times. The length of the inter- 
maxillary in a specimen of Z. sarszz of a total length of 177 mm. is thus 
9.5 mm., and in a specimen of L. muraena of a total length of 197 mm., 
but 6 mm. 
In Z. muraena the branchiostegals are 5; in Z. sarsti 6. 
In Z. muraena the colour is always a uniform greyish-brown (in all 
its hitherto known stages), while Z. sarsii is speckled in the intermediary 
stages. 
Christiania, Jan. 1808. 
