FISSURELLID,E. 221 



5. granuxatus (f. 3,20). — "Testa supeme tuberculis parvis 

 granulata." Olis. The concentric lines are waved and thickened 

 into little knots or tubercles. These are not so conspicuous in 

 the variety termed S. imbrieatus, Quoy et Gaim. The shell is 

 narrowed in front, with an arched back. 



Subgenus Togalia, Gray. 

 Plate XIV. 



Char. Gen. Testa patelliformis, oblonga, antice angustata, 

 dorso elevato, arcuato ; apice postico et recurvo ; aperturae mar- 

 gine crenulato et antice profundi} sinuato. 



The narrowness of the shell in front, the arched character of 

 the back, the decussated structure of the outer surface, and the 

 crenulated margin of the aperture, will be thought to distinguish 

 this sufficiently from Parmoji/iorus. 



1. parmophoridea (f. 5, 11, 16), Quoy. — Ovato-oblonga, 

 convexa et arcuata, margine denticulato, luteo-virescente, striis 

 tenuissimis asperis atque confertis cancellata; vertice obtuso, 

 rima fere nulla. 06s. This is convex and rather narrow at the 

 anterior end, the radiating ribs strongest. 



2. ossea (f. 18), Gould. — Crassa, rudis, albida, quadrangu- 

 lari-elliptica, costis radiantibus nuraerosis insequalibus acutis et 

 striis incrementi decussata, basi arcuata ; margine crenulato, cica- 

 trice musculari bene impressa, incisura baud profunda, intus vix 

 in canalem producta. Olis. Much like T. cinerea, but not so 

 long nor so tapering in front. 



3. cinerea (f. 15, 17), Gould. — Cinerea, E. osseo similis sed 

 tenuior,altior, magis disposite et delicate clathrata, cicatrice muscu- 

 lari incouspicua; incisura minitne profunda, in canalem interiorem 

 valde insignem producta. Obs. The rays are imbricated, and the 

 form is more elongated and depressed than in T. parmophoridea. 

 T. ossea is a shorter and thicker shell. 



4. carinata (f. 13), A.Adams. — Elongato-ovalis, dorso cari- 

 nata, costis longitudinalibus, radiantibus, confertis et striis trans- 

 versis, concentricis, decussata ; apice postice declinato, basi ar- 

 cuata ; aperturse margine crenulato, extremitate anteriore sinuata, 

 sinu intus in canalem producto. Obs. The anterior sinus is conti- 

 nued to the apex as a keel without and a groove within the shell. 



