65 



flocks of two or three hundreds, and remaining a month or so. As 

 the swamps dry up, they retire to the neighbouring rivers, where a 

 few remain to breed. They also occur at Belize. 



120. Cairina moschata (Linn.). 



Peten, rare ; Chimalacon and Aloor Rivers, Honduras, common, 

 and probably breed there. 



Roost on trees and seldom seen on the water. 



121. QuERQUEDULA CAROLINENSIS (Gmel.). 



Aloor River, Honduras. 



122. PODILYMBUS CAROLINENSIS (Lath.). 



One shot at Lake Peten. 



Dived on being alarmed, and continued to do so, giving some 

 trouble to secure it. 



123. Plotus anhinga, Linn. 

 Peten. 



Found singly or in parties of two or three with the following, 

 perching on the same trees, but on higher branches ; very wild. 



124. Phalacracorax mexicanus (Brandt.). 

 Peten. 



In flocks of several hundreds ; stretched in long rows on the mar- 

 gin of the islands of the lake. On approaching in a canoe they dive 

 together, rise again quickly, and retreat, spread out in a long line 

 abreast. 



125. Larus ? 



Belize. 



Liverpool, Jan. 10th. 



4. On a Species of Eolis, and also a Species of Lomanotus 

 new to Science ; with the Description of a Specimen 

 of Eolis cerulea of Montagu. By William Thompson. 

 Communicated by Dr. J. E. Gray. 



My dredging labours in Weymouth Bay have again been rewarded 

 by the acquisition of two new species of the Nudibranchs, and by 

 the rediscovery of one of Montagu's lost species. This last acquisi- 

 tion is very pleasing to me, believing, as I do, that all the species 

 described by Montagu still exist. On a former occasion I was for- 

 tunate enough to obtain his Thecacera pennigera. 



The species described in this paper I was anxious should not rest 

 on my sole authority ; added to which, I was not sufficiently versed 

 in their anatomy to give an equally full description with those in the 



No. 388. — -Proceedings of the Zoological Society. 



