Beaumont — Fauna and Flora of Valencia Harbour, Ireland. 845 



So far as the eYidence goes, then, we have in British waters 

 two well-marked forms of Lomanotus ; the marbled brown 

 Antennularia-haunting L. marmoraius, rarely much exceeding 

 12 mm.^ in length ; and Z. portiandictis, in which brown 

 pigment is entirely lacking, which may attain a length of 

 6 cm., and of whose habitat we have no information beyond 

 the finding of a single small specimen on Cellaria. Whether 

 these are entitled to be considered distinct species, in the ab- 

 sence, so far as known, of structural difference, or only well- 

 marked colour-varieties, must be left for future investigation. 

 In particular we have no information as to whether the small 

 L. marmoratus are mature ; no one, so far as I am aware, 

 having found them spawning. 



"With regard to the two Mediterranean species, Z. genei and 

 L. Msigii, I have only had access to the description in the 

 " Prodromus Faunae Mediterranese " of Carus, So far as one 

 can judge, there seems little reason to regard them as distinct 

 , from one another. L. portlandicus apparently only differs 

 from them in unimportant details of colouring of distinctly 

 less moment than those which distinguish the last-named from 

 L. marmoratus, so that Garstang's relegation of Z. portlandicus 

 to the synonymy of Z. gefiei will probably be justified in the 

 future. On the other hand, I understand from Mr. Garstang 

 that he is now more disposed than formerly to consider 

 Z. marmoratus distinct. 



All my specimens of Z. portla^idicus were observed to swim 

 by a powerful lashing motion of the body from side to side. 

 When indulging in this movement the lateral margins of the 

 foot were closely applied together. One of those taken at 

 Plymouth deposited spawn in the shape of a long white thread 

 (under 1 mm. in thickness) thrown into a loose, elongate, 

 irregular, spiral coil. 



Distribution. — South-west coast of England (Thompson ; 

 Norman ; W. I. B.) ; west of Ireland (W. I. B.) ; Mediter- 

 ranean (?) ( Verany ; Trinchese). 



1 One specimen, 18 mm. long, is the only example of L. marmoratus I have 

 seen exceedina: 12 mm. 



R.I.A. PEOC, SEE. III., VOL. V. 3 N 



