Ogilby — On some Irish Fishes. 535 



Itaia eircularis. — This species is not uncommon on the bank off 

 Portrush, where it is taken on the winter cod-lines. I have notes 

 of ten caught in my own boat between December, 1877, and October, 

 1878, inclusive ; of these, seven were females. In the largest ex- 

 ample — 38i inches total length — the pectoral blotch was absent, 

 and, in its place, were eight white dusky-margined ocelli, placed in 

 regularly corresponding pairs, on the opposite sides of the disk: 

 this specimen weighed 13^ lbs. In the nine others, which corre- 

 spond to the "sandy ray" of Couch, the blotches were present, and 

 one of them measured 30 inches over all, and weighed nearly 7 lbs. 

 There can be no doubt of their specific identity. I think it proba- 

 ble that old individuals lose the blotch characteristic of the small 

 examples. 



Trygon pastinaca. — It must be observed that no competent 

 icthyologist — and we have had many good observers on all sides of 

 our island of late years — speaks of having personally examined an 

 Irish example. I would, therefore, reject it in toto from our list, 

 which is far too much filled up with species of whose occurrence 

 and identification there is no sufficient proof. 



Myliohatis aquila should certainly be omitted for the same 

 reasons. 



Petromyzon marimis. — Common in the Foyle ; but invariably 

 thrown away. 



Petromyzon fluviatilis. — I know of no Irish rivers in which this 

 species is found. 



Petromyzon branchialis. — Is found in streams and mill-races, 

 lying on the southern water-shed of the Foyle. On one occasion 

 I got a lampern adhering to a cod taken in 20-fathom water at a 

 considerable distance from the shore, which, when examined, 

 proved undoubtedly to be this form, with undivided dorsals. 



Branchiostoma lanceolaturn. — There is a mistake about my spe- 

 cimens (mentioned on p. 366). They certainly could not have 

 belonged to this species, as the eyes were easily visible. I con- 

 sidered mine to be much more likely a Leptocephalus. 



Schedojohilus medusophagiis. — For " south coast " read " north 

 coast," and see ante, p. 515. 



