178 The Irish Naturalist. [August, 



L. fasciculaium, but partly closely coinciding in habit with 

 L. dcntatum, Kiitz., and on the other side connected with the 

 form in M'Calla's collection labelled L. agaticiforme. Close 

 to the banks of Lithothamnia we dredged large quantities of 

 Cladophora lying loosely fixed among the Zostera. This 

 most probably is or at least is nearly allied to Cladophora 

 corynarthra, Kutz. There seems to be but little doubt that 

 station 4, and probably also 3, are the principal localities 

 where M'Calla collected calcareous algae. On the other side 

 we were not able to find the spot where a delicate form, 

 apparently nearly connected with L. lichenoides, has been 

 collected and rather considered to be the true L. agariciforme> 

 Harv., as Harvey's description agrees better with this form 

 than that labelled L. agariciforme in M'Calla's collection. 

 However, we could not work over these localities as well 

 as we wished, because they were protected, since some beds 

 for oyster culture had been cleaned, and oysters put out 

 about a year ago. Unfortunately, the agent or owner was 

 away from home, and his herds appeared to be rather too 

 anxious about our seaweed collecting, whether discharge of 

 duty or for other reasons seemed to be a question. 



At station 5 we made only one haul, and found a rather 

 muddy bottom, with thinly scattered specimens of Clado- 

 phora, as at station 4. Depth about 4 fathoms. At station 

 6, also, one haul was taken in a depth of about 5 fathoms, 

 with a rather hard bottom ; there was brought up Lami?iaria 

 digitata and a few specimens of a sterile Lithothavinion, 

 which most probably is L. coralloides, Crn., not formerly 

 found in the British Isles in the sense here taken. In the one 

 haul taken at station 7 the bottom was found to be rather 

 muddy, with some Lithothanmia most nearly related to 

 those in the previous station. 



At station 8, a bank nearly crossing the bay, we found in 

 about 1 fathom water quantities of a rather coarse form of 

 : Corallina officinalis, very much encrusted with Melobesia 

 coralline, the former mixed with Zostera, or often fastened to 

 scattered specimens of L. coralloides, some of which were 

 provided with conceptacles. 



Station 9 (3-6 fathoms) was a rather poor bottom for algae, 

 of broken shells, with a large intermixture of mud and 



