188 F1SSURELLID,E. 



probably belong to either. F. 205 is a remarkably wide and nodu- 

 lose specimen procured during progress. 



Sect. II. Without defined internal border. 



28. nigro-punctata (f. 33). — Crassa, conica, subrotunda, ir- 

 regulari sordide fulva, costellis nigris moniliferis irregularibus 

 alternatim minoribus radiata, intiis viridi, prope apicem incrassata, 

 ad marginem aperturse crenulata, nigro punctata; foramine magno, 

 medio contracto. Obs. A rough, rather round, irregular shell, 

 green within and radiated without by black beaded ribs. 



29. coarctata (f. 60), King. — F. nigro-punctata simili, sed magis 

 laevigata ; foramine medio valide contracto. Obs. It is doubtful 

 whether the contraction of the aperture be not merely accidental ; 

 and varieties of the last species occur which are almost as smooth as 

 this ; but, although I should have been unwilling to found a species 

 from so worn a specimen, I am willing to adopt it as founded 

 by others. 



30. viuescens (f. 37), Sowb. — Ovali-rotunda, conica, viride- 

 scens, costis rotundis alternatim majoribus radiata, intiis viridi ; 

 margine crenulato ; foramine subovali, medio angusto. Obs. 

 Green, with alternately large and small rounded ribs. 



31. MONiOFEiiA (f.175), Soivb., G. B. 2. — Ovali, conica, rugosa, 

 costellis alternatim nigris et fulvis moniliferis radiata ; foramine 

 magno, ovali, medio subangusto, intus calloso, rubro lineato. 

 Obs. This must have been a beautiful shell when in living con- 

 dition, the alternate ribs consisting of minute regular black beads. 

 A pink line defines the inner callus. The worn but still pretty 

 specimen is in M. Hanley's collection. 



32. alba (f. 88, 89), Carpenter. — Ovali, tenui, conica, cos- 

 tellis irregulariter noduliferis alternatim minoribus nonnuuquam 

 nigrescentibus radiata ; foramine oblongo, medio subangusto, 

 paulo supra medium posito. Obs. Were it not a rather thin 

 white shell, it might be taken for a variety of F. nigropunctata ; but 

 the ribs are more regularly alternate, and the nodules upon them 

 are larger and longer. The fissure is placed a little towards the 

 anterior. 



33. alabastiutes (f. 43, 44), Eve. — Crassa, ovali, alba, rugosa, 

 costis crassis, insecpialibus, irregulariter nodosis ; foramine oblongo, 

 magno, medio contracto. Obs. A coarsely-ribbed, thick, white shell. 



34. glaucopis (f. 45), Ere. — Subviridi, F. alabastriti simili 

 sed foramine parvo, caeruleo marginato. Obs. The smallness of 



