ribus; rostra Icevi; margine ventrali crcnatd: long. 0"3, lat.O'lh, 

 alt. 0-2 poli. 

 Hab. ad Sanctam Elenam. 



A single specimen was found in sandy mud at a depth of six 

 fathoms. 



In form it resembles An. longirostrata. — G. B. S. 



Genus Lyonsia. 



^-, \C\^ 'Ltonsia picta. Ly. testd obovatd, tenui, postici lat'iore ; epi- 



I dermide fuscd, lineis nigris undulatis pictd ; marginibus, anticd 



dorsali declivi, posticd dorsali rectiusculd ; anticd ventrali hiante, 



hiatu parvo, posticd et posticd ventrali rotundatis: long. 0'85, lat. 



0-4, alt. 0-65 poli. 



Hab. ad Insulam Muerte dictam. 



Found attached to particles of sand in eleven fathoms' water. 

 As it increases in size it becomes rather irregidar in its form. — 

 G. B. S. 



Lyonsia brevifrons. Lt/, testd oblongd, pallescente ; epidermide 

 obscurd, corned ; latere antico brevi, acuminato, postico longiore, 

 attenuato ; marginibus, dorsali posticd elongatd rectiusculd, 

 dorsali anticd brevi declivi, anticd ventrali hiante, hiatu declivi, 

 elongato, magno : long. O' 8, lat. 0'3, alt. 0'4 poli. 



Hab. ad Sanctam Elenam. 



Found in sandy mud at from six to eight fathoms' depth, attached 

 to particles of sand. — G. B. S. 



Genus Saxicava. 



Saxicava tenuis. Sax. testd oblongd, tenui, albd ; epidermide pal- 

 lescente; latere antico brevi, subtruncato : long. 0'8\ lat. 0'25, alt. 

 0-4 poli. 



Hab. ad Pacosmayo et ad Lambeyeąue. 



Found in coral rock at twenty-five fathoms' depth. — G. B. S. 



Saxicava purpurascens. Sax. testd oblongd, solidiusculd, mtici 

 brevissimd, postice truncatd ; epidermide tenuissimd, postici pur- 

 purascente : long. 1"1, lat. 0'4, alt. 0'4 poli. 

 Hab. ad Insulam Muerte dictam. 



A single specimen was found in sandy mud at a depth of eleven 

 fathoms. — G. B. S. 



Saxicava solida. Sax. testd oblongd, solidd, rugosd, subirre- 

 gulari, albicante ; epidermide corned ; latere antico brevissimo, 

 postico elongato truncato, costis divergentibus duabus conspicuis: 

 long. 1-4, lat. 06, alt. OS poli. 



Hab. ad Sanctam Elenam. 



Found In clefts of rock brought up from a depth of eighteen 

 fathoms. 



