NEW SPECIES OF TASMANIAN MOLLUSOA, 

 WITH CRITICAL REMARKS ON SEVERAL DE- 

 SCRIBED SPECIES, AND ADDITIONS TO THE 



LIST. 



By W. L. :May. 



(Received 20th June. 1919. Read lltli Augu.st, 1919.) 



Plates XIV. -XVII. 



The species heie described include no startling novel- 

 tics, but are more or less closely related to previously 

 known forms. They have come from various parts of our 

 coasts, and frcm lew water mai'k down to one hundred 

 fathoms, and may be described as the balance from several 

 years collecting left after moic striking species have been 

 dealt with. The tvpes of the new species will be presented 

 to the Tasmanian !Mu.seuni. 



June. 1919. 



C.VLI-OC HITnX ELDNGATr?, sp. UOV. 



Shell very small, narrowly elongate, girdle rather 

 broad; rather elevated; the valves distinctly beaked. 

 Coloui- — Purplish-brown, lighter on the doi-sal area, giving 

 the appearance of a longitudinal pale band. A co-type has 

 the 6th and 7th valves mostly pale green and the 2nd 

 valve with a large whitish blotch dorsallv. 



Anterior valve ?.emi-circular, slightly beaked, covered 

 with minute pustules ; median valves with lateral areas 

 distinctly raised, the pleural and dorsal areas are not 

 separated, except that the low pustules that cover the 

 whcle valve become finer and more longitudinal towards 

 th« ridge. Tail valve with mucro about one-fourth from 

 the adjoining valve differentiated from the re.st of the 

 valve by a small ridge and very slightlv elevated. Girdle 

 covered with imbricating, elong.\ted. sharp-pointed .scales, 

 and similarly coloured to the vaK es, but of a lighter shade, 

 sometimes with ])aler blotches. 



Length 7.^ ; breadth, 3.6 mill. 



Habitat. Norfolk Bay and Port Arthur (E. Mawle). 

 Seven or eight specimens collected. This beautiful little 

 species is a very much smaller and iinrrnircr shell than ('. 

 jihifexsn, Grould ; (' . nific, Ashby, the type of which I have 

 f-een, is broader still. The present sjoecies has for its size 

 coarser sculpture than ji/afe-^sa. It varies much in colour- 



