334 NOTES ON SOME RIJITISII NUDIBRANCHS. 



22. Amphorina olivacea (A. & H.). 

 ( = Cratena olivacea.) 



23. Cratena amcena (A. & H.). 



24. Calma glaucoides (A, & H.). 



25. AntiojjeUa cristata (Delle Cliiaje). 



26. Janolus hyalinus (A. & H.). 



27. Janolus Jiagellatus, sp. iiov. 



28. Aldcria modesta, Loveii. 



29. Sfiliger helliUus (d'Orbigny). 



Of the above, Coryphdla heaumoidi and Janolus Jiagellatus are new 

 species. The first may be regarded as certain, though it offers so many 

 peculiarities that its place in the genus Corypliella is open to question. 

 Janolus flagrllatus differs from other described species in its genitalia, 

 but cannot be regarded as certain until better preserved specimens 

 are examined. Berghia ccerulescens must be removed from the list of 

 the British fauna, for the only recorded specimen is a Facelina coroTuita ; 

 but Staiirodoris verrucosa may be added, for it seems to be certainly, 

 though sporadically, recorded from Devonshire, the Clyde, and West 

 Ireland. 



An examination of the type specimen of Tritonia alba, A. & H., has 

 enabled me to show that this species, which has been called in ques- 

 tion, is valid and well cliaracterized. Tiie valuable material with which 

 I have been supplied has, I hope, enabled me to amplify our knowledge 

 of Lomanotus, Hancockia, Alderia, and Gulma. The systematic position 

 of the last genus appears to me to have been misunderstood ; Calma 

 glaucoides belongs to the same genus as the later Forcstia niirahilis of 

 Trinchese, but Calma cavolini must be removed from this group, as it 

 does not possess the characteristic radula. 



I have also attempted to elucidate the synonymy and affinities of 

 Alder and Hancock's Boris testudinaria, which appears to be a fairly 

 common form, though often confounded with Arcliidoris tuhercidata, and 

 have also examined the classification of the Cratenidie. I think that 

 the genus Amphorina must be referred to this group, and that the 

 animals described as Cratena olivacea and Cutkomt aurant'uica are really 

 referable to Amphorina. Eolis angulata is probably a young jEolidiella 

 glaaca. 



TRITONIA. 



A species of this geims which has been called in doubt is now shown 

 to be valid by an examination of the type specimen, and the following 

 additions may be recorded to Tritonia and Candiella, of which Bergh 

 recognized sixteen species in the tiijstem der Nudihranchiaten Gastcro- 

 poden, 1892. I do not think that the distinction between Tritonia and 



