380 NOTES ox SOME BRITISH XUDTHRANCHS. 



The genus was created by Elirenberg (1831) for an animal found in 

 the Red Sea and having the same external characters as tliis species, 

 though the radula is unknown. Until the original Stiliger ornatus (not 

 modestns, as it is sometimes quoted) is re-examined, some doubt must 

 exist as to the identity of Calliopcea and Stilujer, though that identity is 

 highly probal)le. 



in 1837 d'Orbigny gave the name of Calliojjcva bellula to a mollusc 

 whose external characters are quite recognizable from liis description, lu 

 1865 Meyer and Mobius {Fauna der Kieler Bucld) described an appar- 

 ently identical animal as EmUetonia maria', wrongly regarding it as an 

 -i^olid. Bergh refers both forms to Stiliger and brackets them together, 

 but gives the preference to Meyer and Mobius's name, although 

 d'Orbigny's name has undoubted priority if his species is admitted to be 

 a Stiliger. 



Througli the kindness of Mr. Farran I have received three specimens 

 from liallynakil, Co. Galway. They are indifferently preserved, and 

 have lost some or all of the cerata. The best specimen is 7 mm. long 

 and has thirteen cerata remaining. They were apparently set in two 

 rows, and are of an ovoid shape. The posterior cerata of the inner row 

 are relatively very large (2 mm. high). The rhinophores are distinct 

 and white. 



The ground colour is greyish white, with brownish or olive markings 

 on the cerata and body. The foot is greyish white without markings. 

 The opaque white internal organs, especially the hermaphrodite gland, 

 can be seen through the integuments. 



The radula contains five teeth in the ascending and twelve in the 

 descending slightly spiral portion. They are as represented by Bergh, 

 but 80 transparent that they are seen only with difficulty. 



The species is recorded from Kiel, West Ireland, the Atlantic coast 

 of France, and Trieste, 



LIST OF FIGURES. 

 (Plates XL and XII.) 



L Tiitonia alba. a. rliacliidiaii tootli ; b. first lateral ; c. second lateral ; d. e. f. 

 laterals from middle of lialf-row ; </. outermost tootli. 



2. Archiihms test udi}uir{a. a. b. c. teeth from tlie inner j)art of the half-row ; 



d. tootli with an abnormal projection ; e. f. teeth from the outer part of 

 the row. 



3. Lamellidoris oblomja. a. inner tooth ; b. outei' ditto. 



4. Lamellidoris dep-essa. a. inner tooth ; b. outer ditto. 



