Antiopella.] GASTROPODA. 585 



arranged along the sides of the back, and continuous above the head. 

 Mouth with corneous jaws. Lateral and marginal teeth of radula 

 numerous, narrow ; central tooth narrow. 



Genus hitherto recorded with certainty only from North Atlantic. 



1. Antiopella novozealandica, Eliot, 1907. 



Antiopella novozealandica, Eliot, P. Mai. S., vii, Sept. 1907, 331. 



Animal stoutly built, greyish in colour. Down the middle of the 

 back, both before and behind the rhinophores, runs a purplish stripe 

 which becomes dissolved into a multitude of dots posteriorly. In 

 the middle of this stripe, just behind the rhinophore, is a lozenge- 

 shaped light-coloured area. The rhinophores are grey with purplish 

 spots, large (4mm. high), and have between them a large crest of the 

 same colour. Both the rhinophores and the crest are so amply and 

 deeply perfoliate that the whole arrangement superficially resembles 

 the branchial rosette of a Dorid. The anal papilla is large, promi- 

 nent, medio-dorsal, and nearly terminal, with a crenulated edge. 



The cerata are very numerous, often flattened as preserved, but 

 apparently originally fusiform. The innermost are the largest, and as 

 much as 6-5 mm. high. They are not set in regular rows, but in a 

 reticulate pattern, which is generally 46 mm. deep transversely. 

 Two or three lines of small cerata extend round the head in front of 

 the rhinophores. The hepatic diverticula within the cerata are of 

 irregular shape, and often conspicuously granulate or folliculate, but 

 not bifid or branched. Some parts of them are much darker than 

 others, and spotted with purple. 



Below the anterior mantle-edge is a small oral veil bearing 2 dis- 

 tinct purple tentacles. The foot is broad, with expanded lateral 

 margins, which are not, however, broader than the body ; its anterior 

 margin is bilobed and connected with the mouth, but not grooved or 

 produced into tentacular processes. The genital orifices are rather far 

 back, 6 mm. from the anterior end. The tail is very short. 



Length, 14 mm. ; breadth, 6 mm. ; height, 4 mm. 



The buccal mass is very large. The jaws are long, but narrow, 

 bright yellow, but darker near the hinge and edges. There are acces- 

 sory pieces near the hinges. There appears to be some denticulation 

 on the cutting-edge, but it is not large, or distinct. Possibly the jaws 

 have been injured. The radula consists of 23 rows (3 undeveloped) 

 of white transparent teeth. The maximum formula is 37+1 + 37. 

 The central tooth is not conspicuous, and differs from the others only 

 in its central position and in being smaller. The teeth are hamate, 

 not denticulate, and increase in size outwards. Only the outermost 

 of all is smaller. (Eliot.) 



For further anatomical details see Sir Charles Eliot's paper. 



Hob. New Zealand, exact locality unknown. One specimen. 



