22 



Variat tesld parvd longiore, costis decussantibus omnibus lamellife- 



ris : long. 08, lat. 04, alt. 07 poll. 

 Hub. ad Acapulco. — G. B. S. 



Venus undatella. Ven. testd rotundato-ellipticd, crassd, albidd 

 fusco maculatd punctatd et undatim pictd, costellis radiantibus 

 confertis, aliisque decussantibus undulatis sublamellosis ; latere 

 nntico breviore, postico subdeclivi, marginibus depressis ; margins 

 ventrali rotutidato, inttis crenulato : long. \Q, lat. 1', alt. l"5 

 poll. 



Hab. in Sinu Califomiensi. (Island of Tres Marias.) 



Found on the shore. — G. B. S. 



Venus discrepans. Ven. testa elUpticd, crassd, albicante, fusco 

 subradiatim pictd ; latere antico breviore, siibproducto ; postico 

 subdeclivi ; marginibus depressis ; costis concentricis postice lamel- 

 losis, medio obtusis, latiusculis, antici sublamellosis ; umbonibus 

 subprominentibus ; margine ventrali rotundato, intus denticulato : 

 long. 1-4. lat. 0-8, alt. 1-25 poll. 



Hab. ad eras Peruviae. (Islay.) 



The blunt, rather broad, concentric ribs of the middle part of each 

 valve are speckled with brown on their upper surfaces, and delicately 

 crenulated on their ventral margins. 



Found in muddy sand at a depth of sixteen fathoms. — G.B.S. 



Venus multicostata. Ven. testd elUpticd, ventricosd, crassd, con- 

 centrice multicostatd, costis reflexis, crassis, antice undulatis, me- 

 dio crenatis, postici alternatim interruptis, subirregularibus, sub- 

 iindulatis; marginibus dorsali rectiusculb, ventrali rotundato ; im- 

 pressione cordiformi anticd distinctd : long. 4'3, lat. 2'7, alt. 3'7 

 poll. 

 Hab. in Sinu Panamse. 



This is perhaps the largest species known. It is a very handsome 

 shell, of a pale fawn colour, with several darker rays, somewhat 

 divided into spots. 



Found in coarse sand at low water. — G. B. S. 



Venus Peruviana. Ven. testd obovatd, crassd, concentrice costatd, 

 costis crassiusculis, subla7nellosis, antice reflexis, medio reflexis, 

 fulvo articulatis, postice deflexis, tenuioribus ; latere postico quam 

 anticum duplb longiore, marginibus depressis, planatis ; margine 

 ventrali rotundato, inttis Icevi : long. 23, lat. 1'2, alt. 19 poll. 



Hab. ad oras Peruviae. (Ancon.) 



Found in soft mud at a depth of five fathoms. — G. B. S. 



Venus Australis. Ven. testd ovato-subtrigond, crassiusculd, ful- 

 vcscente maculis angulosis subtrigonis subradiatim pictd, concen- 

 trice lamellosd, lamellis concinnis confertis, tenuibus, obtusis, pul- 

 cherrime radiatim decussatis, prope latera elevatioribus ; margi- 

 nibus dorsali subelevato, ventrali rotundato, intus denticulato : 

 long. 1-1, lat. 0-55, alt. 0-9 poll. 



Hab. ad oras Australiae. (Swan River.) — G. B. S. 



