Appendix to Part II 607 



obtusis, antice posticeque acutioribus ornatd : long. 1* ; alt. 0*7 ; 

 lat. 04, poll. 



I have compared the single valve of this with numerous recent 

 and fossil Veneres and Cytlierece, without being able to identify it 

 with any. As I have not been able to see the hinge, I have only 

 judged it to be a Cytherea from analogy. 



Chiloe, eastern coast : islands of Huafo and Ypun ? 



Caeditjm Puelchttm. — PL II. fig. 15. 



Cardium testa subglobosd, tenui, Iceviusculd, latere postico subcari- 

 nato, superjicie striis radiantibus, numerosissimis, confertissimis 

 instructd. 



The radiating striae and the interstices are nearly equal. Nearly 

 the whole outer surface is gone from both specimens. 



Santa Cruz, Patagonia. 



Caeditjm httltieadiatttm. — PL II. fig. 16. 



Cardium testa subglobosd, costcllis radiantibus posticis 13, rotundatis, 

 medianis plurimis planulatis, interstitiis rotundatis ; margine 

 denticulato. 



These are all the characters that can be given, as there is only 

 the posterior portion of one valve ; of course the general form is 

 only surmised, and the proportions cannot be ascertained. 



Navidad, Chile. 



Caedita Patagoklca. — PL II. fig. 17. 



Cardita testa subtrapeztformi-rotunda, tumidd, subcordlformi, subob- 

 liqud, costts radiantibus 24:, angustis, angulatis, squamoso-se?'ra- 

 tis, interstitiis latioribus. 



Nearly related to C. acuticostata, and may be distinguished by 

 having fewer and more distant ribs. 



Santa Cruz, Patagonia. 



NUCULA ? GLABEA. — PL II. fig. 18. 



flucula testa ovato-oblongd, glabra, nitidd, latere antico breviore t 

 postico magis acuminato ; marginibus dorsalibus declivis. 



I have referred this to Nueula, because there is no external ful- 

 crum for the attachment of the cartilage and ligament ; the nature 



