SOLENELLA AND N E I L 0. 



Genus SOLENELLA, Sowerhy. 



Testa bivnlviKi bimuscidosa, transverse oblonga, ntrinqne 

 Mans. Ligamentum externum conspivuum. Impressio 

 pallii sinuata. Margo cardinalis antice dentibus 

 paucis, postice numerosis, acutis, crectis armatus. 



Shell bivalve, bimuscular, gaping at both ends. Liga- 

 ment external, conspicuous. Palteal impression 

 sinuated. Hinge margin armed with sharp, erect 

 teeth, few anteriorly, numerous posteriorly. 



The two first published species of this genus are 

 South American, one from Valparaiso and the other 

 from the Falkland Islands. The new species now 

 presented is Australian; although possessed of the 

 sharp row of teeth so characteristic of the Nuculida, 

 the Solenella have no place in the family, because they 

 have a prominent external ligament and no cartilaginous 

 pit. 



Species \. (Mus. Leckenby.) 



S0LENELL.\ SUB.EQUALIS. Sol. tCStd brevi, SIlb-CBqui- 



laterali, utrinque subacuminatd, viridi-olivaced ; 

 latere postico parum latiore laliusculo, margine 

 dorsali rectiusailo, margine laterali declivi, ad 

 teiinhmm acuminata^ margine ventrali siirsum 

 acclivi ; medio recto ; latere antico subtrigono. 

 The sub-equal Solenella. Shell short, subequila- 

 teral, rather acuminated at both ends, olive- 

 green ; posterior side a little wider, dorsal margin 

 nearly straight, lateral margin sloped downwards, 

 acuminated at the end ; ventral margin sloped 

 upwards, straight in the middle ; anterior side 

 subtrigonal. 



SOWERBT. 



Hab. Australia. 



In Solenella No/Tissii, the posterior side is the 

 shorter ; in Sol. Cumingii it is the longer, but in the 

 present species the sides are nearly equal in length, the 

 umboes being central. 



Si-ocies •>. (Fig. a, b, Mus.) 

 N.iiMilssii. Sol. tc.itd siiboratil 



piKdralii. Into, ml , 



rt prop.' 

 rto, Huh- 



gine vciUnili recto ; latere antico breriore, angu.-ito, 

 ad termiuiim suhacitminato, prope marginem 

 ventrakm lerlter triiiirato. 



NoRRis's Solenella. Shell stibovate, much com- 

 pressed, olive-green brown-banded, within and 

 near the umboes orange-brown ; posterior side 

 straight, subquadrate, wide, obtusely angulated ; 

 ventral margin straight ; anterior side shorter, 

 narrow, subacuminated at tlie end, slightly trun- 

 cated near the ventral margin. 



SowEuiiY. Proc. Zool. Soc, 1832. 



Mallet ia Chilensis, Desmarest. 



Cteroconrhus Nuculoides, Blainville. 



Ilab. Valparaiso. 



In this species the umboes are much nearer the 



anterior than the posterior end. 



Species 3. (Mus. Cuming in Brit.) 

 Solenella Cumingil Sol. tc.'ftA ovatd, conve.dhscvld, 

 fasciis pallidis biradiatd ; latere postico brevius- 

 culo, lata, infrd, oblique subtruncato, ad iermimim 



obtusi 



ang 



ulato , 



'rgine ventrali parum ron- 



vexo, latere postico longiiosculo, rotuiidatim acu- 

 minato. 



Cuming's Solenella. Shell ovate, rather convex, 

 rayed with two pale bands ; posterior side rather 

 short, wide, obliquely subtruncated beneath, very 

 obtusely angular at the end ; ventral margin a 

 httle convex, posterior side rather lengthened, 

 roundly acuminated. 



Hanlet. Proceedings of the Zoological Society, 18(10. 



Hab. Falkland Islands. 



The position of the umboes in this species is exactly 



the reverse of that in the jireceding, being nearer the 



posterior end. 



October, 1870. 



