11 



opaque, white, spiral, outer whorl riding into a carina- 

 ted ridge on the top, the middle concave and somewhat 

 pervious, inner volutions inconspicuous, base a little 

 spreading; aperture round. 0,0625. Salcomb Bay, on 

 shells. 



S. CORRUGATA SERPULA. C. Mont. p. 502. Lin. 

 t. 8. p. 242. D.p. \5\.Turt. D. p. 151. Strong, 

 spiral, white, roughened by transverse wrinkles, a small 

 portion only of the second volution visible ; centre 

 umbilicated ; aperture orbicular. F. Not rare on 

 slate rocks at Milton, stronger than Spirillum and 

 never exposing so much of the interior volution. 



S. MINUTA. SERPULA. M. Mont p. 505. Turt. 

 D. p. \5Q.-Lin. T. 8. p. 241. D. p. 1072. Very 

 small, spiral, dirty white, with two or three lateral volu- 

 tions, wrinkled transversely, sometimes with a slight 

 longitudinal furrow on each side, forming a ridge or 

 carina along the back. 0,02. Heteroclite and not 

 easily distinguished from Heterostropha except by its 

 size, rounded base and habits. On Corallina Offici- 

 nalis. 



S. LUCIDA. SERPULA. L. Mont. p. 507. Lin. 

 T. 8. p. 243. D. p. 1075. Turt. Die. SERF. 

 REFLEXA. Adams in Lin. Tr. 5. p. 4. t. I./. 31. 2. 

 Irregular, heterostrophe, pellucid, glossy, white, rlways 

 more or less spiral, sometimes lateral, with two or three 



