part 3] THE TEiAS or new zeala^'d. 187 



almost disappears on the last whorl of some specimens, which in 

 -consequence become nearly smooth above the slit-band. The latter 

 is rather broad, and occurs above the keel in the last whorl. The 

 keel is decorated with a line of blunt nodes, and there are a number 

 of parallel threads between it and tlie slit-band. Beneath the 

 keel are about eight concentric spiral lines, which are crossed b}' 

 the growth-lines. The umbilicus is covered by a callosity of the 

 inner lip. The slit-band seems to correspond to a rather deep 

 notch in the lip. Diameter=:18 mm. ; height=:10mm. 



Locality and horizon. — Bed c, Otamita (Hokonui Hills), 

 where it is common. Also on Mount Heslington, Nelson. Carnic. 



Trochus (Tectus) maeshalli, sp. nov. (PI. XVIII, iig. 7.) 



Shell trochiform, consisting of eight whorls, which are sharply 

 keeled, and each one slightly overhangs the suture below it. The 

 whorls are slightly concave above the keel. Below the keel the 

 base is hollowed out and concave. The keel is decorated with a 

 line of forward-pointing nodes, which rather resemble the teeth of 

 a saw. The lower part of each whorl above the keel is decorated 

 with five or six parallel thread-lines, and beneath it are several still 

 fainter lines. 



The columella is strong and twisted, and folded near the inner 

 lip. The aperture was not preserved. Diameter==15 mm. ; height 

 = 18 mm. 



Locality and liorizon. — Bed c, Otamita (Hokonui Hills), 

 where Prof. Marshall collected it during one of our visits. Carnic. 



Pemarks. — Several species of Trochoid shells with a twisted 

 inner lip occur in the Alpine Hallstatt Limestone, and are figured 

 hy Koken under the generic name Tectus ; but none of them 

 resemble the form here described. It ma}'' seriously be questioned 

 whether these Mesozoic Trochoids are congeneric with the Tertiary 

 .and recent genus Tectus. 



COEONARIA SPECTAEILIS, sp. nOV. (PI. XYIII, fig. 4.) 



The shell consists of fifteen or more whorls which increase slowly 

 in size ; the test is fairly thick, the nodes being but faintly visible 

 on the internal cast. The decoration consists of a series of pro- 

 minent rounded nodes of elongate outline, arranged with their 

 longer axes upright. The nodes occupy most of the surface of each 

 whorl, but above them, and just below the suture, is a flat band 

 which bears three or four raised spiral lines with shallow grooves 

 between them. A series of fainter raised spiral lines passes round 

 that part of the whorl which is occupied by the nodes, and across 

 the depressions between them. The umbilicus seems to have been 

 shallow ; but the shape of the aperture or lip could not be 

 ascertained. The earliest whorls appear to have been devoid of 

 ornamentation. The liolot^'-pe is 96 mm. long, and has an apical 

 angle of 14"^. 



Locality and horizon. — Western slopes of Mount Heslington, 



