120 



differs entirely in sculpture, its beak is very much shorter, and it 

 is very much smaller. 



Cerithium invaginatum. Testa elongato-turrita, sordide 

 alba, ad apicem et interdum ad rostrum rufescens, filis tenuibus 

 cincta ; spira anfr. 10-12 angulato-convexis, superne tabulatis, 

 inferne constrictis, nodoso-plicatis et concinne lamelloso-rugosis, 

 ultimo carinato : apertura subquadrata, alba; rostro gracili, 

 recurvato. Long. |^, lat. ^ poll. Hab. Feejee Islands. 



A very peculiar species. The tuberose whorls narrowed an- 

 teriorly, so as to appear when viewed from above as if crowded 

 into each other, and the very delicate wrinkling of their superior 

 portion renders their diagnosis clear. 



Cerithium c^latum, Couthouy MS. Testa subulato-turrita, 

 dilute rufa : spira anfr. ad 13 vix convexis, longitudinaliter crebre 

 sulcatis, et lineis duabus impressis cinctis, ultimo anfr. ad basim 

 inornato ; sutura impressa : apertura rotundata ; columella arcu- 

 ata, rostro brevissimo. Long, f ; lat. ^ poll. Hah. Terra del 

 Fuego. 



This species belongs to the same group as C. iurriteUa, which 

 it resembles ; but in its delicate form it still more strongly resem- 

 bles C. sardou?n, Cantr. 



Cerithium filosum. Testa parva, elongato-turrita : spira 

 anfr. ad 8 planulatis, sulcis et liris alternantibus cequalibus ad 

 4 cinctis, et coloribus cinereis et pallide rufis partitis ; sutura 

 impressa : apertura parva, semi-elliptica, antice emarginata ; col- 

 umella vix arcuata ; labro acuto. Long, f, lat. ^ poll. Hab. 

 Puget Sound. 



Only a single specimen of this turritella-like Cerithium has 

 been examined. It is of the same type as C. ccElatum^ and is 

 well characterized by its simple revolving lines and grooves, and 

 its coloration. 



Cerithium pusillum. Testa minuta, fulva, turrita, varicosa, 

 longitudinaliter undata, undis ad 10 prope basim evanescentibus : 

 spira acuminata, anfr. 8 convexis, filis tenuibus granulosis 4 cinc- 

 tis, anfractu ultimo multicincto : apertura lata, ovata, obliqua ; 

 rostro brevissimo ; labro varicose ; columella arcuata. Long. ^, 

 lat. -jL poll. Hab. Sandwich Islands. 



