HuTTON. — Oti Conchothyra parasitica. 359 



Eeportsof Geological Explorations, 1870-71, p. 10, as Concho- 

 thyra parasitica, McCoy. But, as no description of it has yet 

 appeared — further than in a footnote by myself in the Eeports 

 of Geological Explorations, 1873-74, p. 35 — I presume that it 

 is a manuscript name sent by Sir F. McCoy to Sir J. von 

 Haast. This omission I propose now to supply, with the 

 help of some figures drawn for me by Miss Gordon Eich. 



Genus Conchothyra. 



■ Shell in the young fusiform, the spire acute and about one- 

 third the length of the whole shell. The columella nearly 

 straight. In the adult the shell is globose ; the inner lip with 

 a strong callosity which extends over the anterior end of the 

 aperture, and, in old individuals, covers the whole shell. 

 Columella curved to the right. Aperture rather narrow ; the 

 outer lip developed into a massive lobe, slightly notched above 

 and below. 



Perhaps identical with Pugnellus, Conrad, but differs in 

 the adult in the columella being curved, and the anterior 

 canal not being produced. Also, the incrustation is much 

 thicker. 



C. iKirasitica. PI. XLIIL, figs. 1-5. 



Spire acute, of four whorls, shorter than the body whorl, 

 apparently smooth. Incrustation smooth on the aperture, 

 but rough with growth-lines on the exterior. Lobe of outer 

 lip with nearly parallel sides, rounded at the end, and reach- 

 ing nearly to the anterior end of the shell. Length, 4:7mm. ; 

 breadth, 50mm. Aperture — length 26mm., breadth 14mm. 



EXPLANATION OF PLATE XLIIL 



ConcJiothyra parasitica. 



Fig. 1. Adult shell, natural size, ventral aspect. 



Fig. 2. „ „ dorsal aspect. 



Fig. 3. „ „ basal aspect. 



Fig. 4. „ „ partly decorticated. 



Fig. 5. Young shell (cast), natural size, ventral aspect. 



