Zt > o lo (j i c a I So r i ety . 



513 



The animal of the shell, called by Montagu Turbo unidentatvs 

 (Odos/omia of Fleming), would appear, from the observations of my 

 friend, the Rev. M. J. Berkeley, to be very similar. But the shell, 

 in most points, differs, except in having a fold or plait upon the co- 

 lumella. Still future observations may warrant possibly the modi- 

 fication of the characters of Parthenia, for the reception of this shell 

 and its allies. 



Species quaedam. 



1. Parthenia bulinea. P. testa subcylindraceo-attenuata, oblon- 

 giuscula, juniore ovato-tereti : dnfractibus plants, elegantissime 

 reticulato-cancellatis, striis spiralibus crebris cequidistantibvs, 

 transversa^ cequidistantes decussantibus ; sutura distincta impressa: 

 columella postice tort a, uniplicata. 



a. subvcntricosa. 



Lat. 1^ — If Long, apertae. lj ,3 



t = - . — - lin. : , — = — lin. vel — millim. 



Long. 5 Long, testae 5 10 



Turbonilla Humboldti, Risso, Hist. IV. 394. /. 63. male. Testa 

 junior. 



Tornatella? clathrata, Phil. Enum. 166. 

 /3. gracilis, angustata. 



Lat. ]}-U,. Long, apertae. \\ 



— = -±—z — - hn. : , ' = -f- hn. 



Long. 5 Long, testae 5 



Anfractus 8 in utraque varietate. 



Hub. in mari Maderensi, rara ; vv. Animal omnino lacteum. 



Dredged in deep water in the bay called Labra at P ta Sao Lou- 

 renco, in the spring of 1827, by H. Richardson, Esq. This shell in 

 form resembles a Bulinus. 



2. Parthenia Terebra. P. testa elongato-turrita, gracili, sen- 

 sim attenuata : anfractibus convexiusculis, transverse obsolete 

 costatis s. plicatis, striisque exiguis, concinnis, crebris, spiralibus, 

 alias creberrimas, transversas, tenuissimas, plicasque decussanti- 

 bus : sutura distincta, impressa, 



Lat. 2 Long, apertae. 1| 



j = -=- hn. : ^ '\ = -7T lin. Anfr. 1 2. 



Long. 7 Long, testae 7 



Turritella cancellata, Risso, Hist. IV. 110./. 40? 



Hab. in mari Maderensi cum priore rariss. v. m. 



Of two examples dredged up without the animal, one is in perfect 

 condition. The columella is quite simple, without any fold or plait. 

 The whole shell is sub-opake or milk-white, and in form resembles a 

 Turritella. 



3. Parthenia elegantissima. P. testa elongato-turrita, gracili, 

 sensim attenuata, Icevi : anfractibus convexiusculis, costis trans- 

 versis validis, latis, obliquis, confertis, (equis sculptis : interstitiis 

 Icevibus, costis angustioribus : sutura simplici, distincta : colu- 

 mella postice subtorta. 



Ann. Mag. N. Hist. Vol. vi. Suppl. 2 l 



