new Fishes from the South-west Coast of Ireland. 



87 



for instance, Gadus merlangus always lias a small barbel 

 when young, very rarely when adult. Vomerine teeth also 

 may disappear with age, as in Gadiculus argenteus. 



Lcemonema latifronSj sp. n.* 



Form rather massive anteriorly, compressed behind the 

 shoulders ; body distinctly elevated at the nape, highest at 

 origin of second dorsal, and thence tapering to a very slender 

 caudal peduncle. Head broad and somewhat depressed, but 

 less broad than high, its length about equal to or slightly 

 less than greatest height of body and about 4;^^ in total length 

 without caudal fin. Snout obtuse in vertical, broadly rounded 



Lcemonema latifrons. X \ ca. 



in horizontal profile, about 1^ times in horizontal dian;eter of 

 eye, which is itself contained 3 to 3^ times in length of head 

 and is slightly less than the width of the interorbital space. 

 Height of caudal peduncle about I. of the horizontal diameter 

 of the eye. Barbel minute. Gape rather oblique, angle of 

 jaw not extending beyond centre of eye, upper jaw somewhat 

 protruding; small teeth in bands in the jaws and in a small 

 patch on the vomer. First dorsal, arising about opposite the 



* Absence of material of other Atlantic species of a comparable size 

 makes it impossible to construct a useful key to the genus, but the 

 following brief notes may be of assistance : — 



In comparison with L, latifruiis : 



L. barbatula, Goode and lioan, has a much smaller head, narrower 

 interorbital space, and shorter ventrals ; 



L. globiccps, Gilch., has fewer and much larger scales ; 



Z. iiu'lanurum, Goode and Bean, has a narrower interorbital space, 

 Hnialli'r scales, and much longer barbel ; 



L. ruhustiim, Gthr., has fewer tin-rajs, much longer ventrals, and a 

 less broadly rounded snout ; 



And L. ynrrvUi (Lowe) has larger and fewer scales and a coujpara- 

 tively narrower interorbital space. 



