290 SCUTU8. 



Patella unguis L., Mus. Uhlricse p. 69 ; Syst. Nat. xii, p. 1260 

 (pt.). HANLEY, Ipsa Linn. Conch, p. 5, 24, t. 3, f. 4. Scutus un- 

 guis AD. (pt.), P. Z. S. 1851, p. 221. E. A. SMITH, Journ. of 

 Conch, ii, 1879, p. 261. Parmophorus granulatus BLAINV., Bull. 

 Sci. Soc. Philom. 1817, p. 28. S. granulatus AD. in Sowb., Thes. t. 

 248, f. 3 ; t. 249, f. 20. SOWB., Conch. Icon. f. 2a-b. P. imbricatu* 

 Q. & G., Astrol. t. 69, f. 17, 18. P. corrugatus RVE., Conch. Syst. 

 t. 139, f. l.S. corrugatus AD., P. Z. S. 1851, p. 222. SOWB., Thes. 

 t. 249, f. 7 ; Conch. Icon. f. 3a-b.-TAPP.-CAN., Viag. Magenta p. 

 70. P. japonicus CANEFRI, /. c. t. 2. f. 8, dentition. P. elegans 

 GRAY, Annals of Philos. 1825, p. 139. Emarginula brevicula SOWB. 

 (not P. breviculus Blainv.), Genera, f. 2. P. breviculus Sow., 

 CHENU, Manuel i, f. 2810. S. angustatus A. AD., P. Z. S. 1851, p. 

 222. S. breviculus A. AD. (not Blainv.) in Sowb. Thes. t. 249, f. 6 ; 

 SOWB. in Conch. Icon. f. 4. S. elongatus A. AD., (not Blainv.) 

 Thes. f. 21 ; SOWB. in Conch. Icon. f. Ic. Parmophorus emargina- 

 tus PHIL., Zeitschr. f. Mai. 1851, p. 89. P. ruppeli PHIL., /. c. p. 

 89, P. australis RUPPEL, (not Lam.) Atlas Reise in Nord Afrika, 

 t. 10, f. 5. 



This shell differs from the two preceding in being corrugated on 

 the whole or some part of the surface. The varieties pass into one 

 another by such imperceptible degrees that any division must be 

 artificial. Fig. 8 represents the type shell of Linne ; fig. 4 is Reeve's 

 corrugatus ; figs. 5 and 6 are the granulatus of Blainville, and re- 

 present the Australian type, which is much corrugated and rather 

 elevated ; fig. 7 is a broad form with subcentral apex. 



Unrecognized, unfigured and spurious species of Scutus. 



P. fissurella Blainv. P. patelloideus Cantr.= Tylodina. 



P. sinensis Blainv. P. intermedius R,ve.= Tugalia. 



P.fragilis Blainv. P. abnormis Nev.=Pholas, (dorsal plate.) 



P. gibbosus Anton. Scutum dacicam Walch.=Pholas, (dorsal plate.) 





