176 7 he Irish Naturalist, [August, 



examining the collection of this group of algae in the Science 

 and Art Museum, Dublin. He also was kind enough to make 

 it possible that Mr. H. Hanna was enabled to accompany me 

 to facilitate the object of my visit. Mr. Hanna has collected 

 algae at different parts of the coast, and within the past year 

 has sent me for examination some Lithothamnia from L,arne, 

 Co. Antrim, one of which I have made the type of a new 

 variety, L. calcareum, f. eu?iana, now, however, probably to 

 be considered a variety of L. fasciculatum. 



After a pleasant drive from Ballynahinch station, we arrived 

 in Roundstone in the afternoon, in beautiful weather. We 

 soon saw that it would take more time than we had at our dis- 

 posal to work over the different bays by dredge in search of 

 the so-called " coral banks " where the Lithotha?nnia especially 

 grow, and it was therefore necessary to engage a man well 

 acquainted with the localities. 



The next morning, having engaged the services of a fisher- 

 man who claimed to have personal acquaintance of all the 

 banks on the west coast, including the adjoining bays, we 

 proceeded to Bertraghboy Bay in a sailing boat; but having 

 made two hauls, we soon found he was not acquainted with 

 the particular coral banks we were most interested in. Here 

 we encountered a sudden squall, and were forced to return to 

 Roundstone Bay, where we proceeded to dredge. 



The following day we engaged another man, who had some 

 previous experience in such work. Although he considered 

 himself to be thoroughly acquainted with just those banks we 

 most desired to dredge on, after showing him figures of what 

 we were in search of and newly collected samples, we soon 

 learned that his acquaintance was still more superficial. We 

 then proceeded, with the aid of charts, to locate the banks on 

 which the Lithothamnia were to be found, knowing from 

 Harvey's work that the previously mentioned species were 

 very local and occurred in quiet bays. 



The accompanying sketch (fig. 1.) shows the principal 

 localities where we dredged, indicated by numbers. 



In Station 1 we found, in a depth of about 3 fathoms, 

 immense quantities of a small form, partly allied to L. squar- 

 7ulosum, partly to L. calcareum. We found a number of 

 specimens entire, some of which were in fruit. The bulk of 



