214 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



well impressed. Pallial sinus deep and broad, rounded in front, not 

 coalescent at the base with the pallial line. 



Dimensions. — Auckland specimen: length 14, height 11, diameter 

 6 mm. Elongated specimen from Stewart Island : length 25, height 

 17, diameter 10 mm. 



Hah. — Stewart Island (type). There are also specimens in my 

 collection from Auckland Harbour; 25 fathoms near Channel Island, 

 Hauraki Gulf; Manukan Harbour; and Petane Harbour. 



Tj'pe in the Colonial Museum, Wellington. To the synonyms 

 mentioned hj Hutton in his Pliocene Mollusca T. decussata has to be 

 added, as there are specimens of L. lintea in the Colonial Museum 

 labelled with Lamarck's name by Hutton. The specific name 

 Stangeri, Desh., used for our species up to a few years back, had to 

 be abandoned since Mr. Hedley kindly told me that Mr. E. A. Smith 

 in his Marine Mollusca of the Maldive and Laccadive Archipelagoes 

 (p. 627) had reduced T. Stangeri to a synonym of T. carnicolor, 

 Hanley. The tracing of the figure of the latter, also sent by 

 Mr. Hedley, at once convinced me that our lintea is quite a different 

 species. About two years ago I sent a few specimens of our shell to 

 Mr. E. A. Smith, of the British Museum, asking him to be good 

 enough and tell me whetlier they were the same as T. suboi-ata, Sow., 

 and I am indebted to him for the following information: — "The 

 bivalve is not a Tellina and quite distinct from T. Stangeri, Desh., 

 and subovata, Sow. It has a different dentition and internal ligament 

 which, is not found in Tellina. It is near the genus Leptomya, 

 A.. Adams." 



I had full confidence in Hutton's classification, and had never 

 closely examined the hinge, or I should have seen that it is not 

 a Tellina. 



The shell is variable in length and colour, but the chief characters 

 are constant in all specimens I have seen. The yellowish-brown and 

 elongate form I know only from Stewart Island ; specimens from the 

 North Island are always white and nearly equilateral. This variability 

 may no doubt account for the many names adopted for this species, 

 but a worker in New Zealand may well be excused maUing a mistake 

 now and again, for reasons pointed out by me in several places. 

 Notwithstanding some unavoidable errors, conchologists will agree 

 with me when I express the opinion that the work done by the late 

 Captain F. W. Hutton was good and accurate. Few men could have 

 done better under the prevailing circumstances. 



Dentalium (Episiphon) ARENARiuii, u.sp. PI. XVIII, Fig. 11. 



Shell arcuate, tapering, thin and shining, with a yellowish tinge. 

 At the apex 10 equidistant rounded longitudinal ribs, which may 

 increase to 12 or more towards the anterior end; interspaces distinctly 

 longitudinally grooved, the number of these grooves being 5 to 7, with 

 minute, fine, somewhat irregular growth-rings. When the aperture 

 has been damaged the new growth of the shell may show but traces of 

 the costiB, being minutely reticulate. Posterior and anterior section of 

 shell circular. Apex with a central small tube inserted in the partly 



