IN THE LOWER TERTIARr STRATA. OF NEW ZEALAND. 217 



differs from both tliese in size and in the close arrangement of 

 the whorls. 



LatruncuUa (c). — PI. XI. fig. 17. Sceptrella with stout shaft 

 having obliquely directed spines at its base ; in the middle of the 

 shaft a whorl of spines, apparently grouped in fours, and another 

 similarly formed whorl near the summit. The apex consists of a 

 central spine surrounded by smaller ones. Length of spicule 

 •083 mm., extreme width of whorls '056 mm., thickness of shaft 

 "016 mm. 



Latrunculia (d). — PI. XI. fig. 18. Sceptrella with oblique 

 furcate spines at the base, a median whorl of simple and furcate 

 spines, and a summit of stout horizontal or oblique spines. The 

 apex consists of a group of slender acute spines. Length of 

 spicule *04 mm., width across whorls "023 mm., thickness of shaft 

 •007 mm. 



Latrunculia (e). — PI. XI. fig. 19. Sceptrella having an ex- 

 panded base of obliquely directed acute spines, a median whorl 

 of horizontal spines of unequal sizes, and a summit whorl of tri- 

 furcate spines. At the apex are minutely dentate crests and 

 spines. Length "031 mm., width of central whorl "027 mm., 

 thickness of shaft "0083 mm. This form is of a similar character 

 to the preceding (fig. 18), but it is shorter and more compact. 



Latrunculia (f). — PI. XL fig. 20. Base of shaft expanded, 

 with minute divergent spines, central whorl of horizontal spines, 

 summit expanded and an apex of upright laminae with spiued 

 margins. Length of spicule '036 mm., width of whorl "016 mm., 

 thickness of shaft "005 mm. 



Latrunculia (g). — PI. XI. fig. 21. Sceptrella with expanded 

 base armed with small simple spines ; a median whorl of horizontal 

 spined processes, and a similar but narrower summit whorl. The 

 apex of the shaft is obtusely rounded, with a crest of minute spines. 

 Length of spicule "OiG mm., width of median whorl '031 mm., 

 thickness of shaft "Oil mm. 



Latrunculia (h). — PI. XL fig. 22. Base of shaft with strongly 

 divergent simple spines, a median whorl of stout horizontally 

 disposed spines, the summit and apex consists of a group of 

 facetted and minutely spined protuberances. Length of spicule 

 •056 mm., width of median whorl "CIS mm., thickness of shaft 

 •018 mm. 



Latrunculia (i). — PI. XL fig. 23. Scej)trella with base of stout 

 divergent spines and a median whorl of horizontal spines as in 



