199 



continue beyond the fourth whorl. C. Ralphii was founded on a 

 very young individual, 10 ram. in length, at which stage of growth 

 there are only four spire-whorls, but from an authentic specimen 

 of that size I have traced it, through many intermediate stages, 

 to the adult example which is here figured. The comparisons 

 made by the original describer with certain species of the Vien- 

 nese Miocene and with C. Carmeli of Australian waters are now 

 no longer applicable, as the coronation of the whorls of our fossil 

 is a character restricted to juvenile examples. 



8. Conus aerotholoides, i^pec. nov. 



Shell pyriformly oval, with a low, broadly conical, almost 

 hemispheric spire, ending in a small, obtuse, apiculate pullus of 

 two smooth whorls, the first of which is vertical and its tip im- 

 mersed. 



Spire-whorls four, suture more or less concealed by the overlap- 

 ping of the posterior edge of the whorls ; ornamented by four 

 rounded threads, about as wide as the intervening furrows, and 

 by fine curvilinear transverse striae, the posterior suture is mar- 

 gined by a broader flat band. 



Body-whorl bluntly rounded at the periphery, on which are 

 three spiral threads ; anterior to the periphery there are about 

 14 flat granulose threads, defined by linear lines, the flat inter- 

 spaces are more or less spirally striated ; the granulose lir^e be- 

 come crowded towards the front; the whole surface is marked 

 with fine close-set striae of growth. 



The outer lip is post-medially ecurved, and obliquely and shortly 

 notched at the posterior angle. 



Dimensions. — Length, 14; greatest width, 7; length of aper- 

 ture, 11-5. 



Locality. — Blue clays at Schnapper Point. 



9. Conus extenuatus, spec. nov. 



Shell narrowly biconical, two and a-half times as long as wide ; 

 the spire subscalar, gradually tapering to the small obtuse pullus 

 of two whorls, the first of which is oblique, with its tip im- 

 mersed. 



Spire-whorls seven, with the periphery slightly exsert, behind 

 which they are slightly concave, separated by a narrow well- 

 defined suture. The earlier whorls are slightly nodulose or crenu- 

 late at the keel, but this ornament disappears with the revolution 

 of the spire. The spiral ornamentation consists of three or four 

 unequal flat threads, which is crossed by close-set arched striae. 



Body-whorl bluntly keeled at the periphery, concave behind, 

 slightly contracted in the anterior-third, but otherwise much at- 

 tenuated towards the front. The surface with distant, regular, 

 punctated, spiral grooves, between which are wider flat ridges. 



