Beaumont — Fauna and Flora of Valencia Harbour, Ireland. 843 



So far as I know, only three large specimens of Lomanotus 

 had previously been obtained in Britain, viz. : two examples 

 dredged in Weymouth Bay by Thompson (Z. portlmidicus) and 

 one by J^orman off Berry Head, Torbay (Z. Sancocki). Two 

 more have been recently found at Plymouth by myself. In 

 the case of not one of these does the precise habitat appear to 

 have been discovered. 



I was at first disposed to follow Garstang in uniting all the 

 Britisli Lomanotidte as one species. I certainly agree with him 

 that the specific distinctions laid down by the authors of the 

 four British specimens will not hold good. With Garstang' s 

 criticism of the specific characters I fully agree ; apart from 

 details of colouring, my three large specimens agree precisely 

 with the descriptions of L. portlandicus and Z. SancocJci, except 

 as regards one point in each case ; the plearopodial fold on each 

 side is continuous with the sheath of the rhinophore, and the 

 rhinophores are finely laminated. With all due deference to 

 the great experience of the authors of those species I confess to 

 attributing these differences to imperfect observation on their 

 part. So far as external structure is concerned there seems 

 indeed little reason to doubt the justice of Garstang's conclusion 

 that the small specimens he studied were merely the young of 

 the large species. But examination of a number of small 

 individuals during the last two years, in addition to the larger 

 ones already mentioned, has brought out a distinct and appa- 

 rently constant difference in colour. Small specimens of 

 Lomanotus, rarely exceeding 12 mm. in length, are not uncom- 

 mon at Plymouth on Antennularia. Except when very small 

 (6 mm. or less), they are deeply pigmented with various shades 

 of brown with a superficial sprinkling of opaque yellowish 

 white, producing a marbled pattern, and rendering them deci- 

 dedly opaque. These are undoubtedly the Eumenis {Lomanotus) 

 marmorata^ of Alder and Hancock. They have been described 

 in some detail by Garstang. My large specimens, on the other 

 hand, were, considering their size, very transparent. One was 



' The entire margin of the rhinophoral sheaths of E. marmorata was doubtless 

 an individual peculiarity of the single specimen seen by Alder and Hancock. The 

 erroneous representation of the anterior part of the pleuropodial fold in their draw- 

 ing may possibly be explained by the fact that this specimen was somewhat 

 injured, though the same error seems to have been made in describing L. portlan- 

 dicus. 



