18 ' 9 MR - G. F. ANGAS ON NEW SHELLS. 4] 9 



blue spotted with brown; interior of the valves faintly stained with 

 purple and orange ; margins crenate. 



Long. 9, lafc. 9, alt. 4 lin. 



Hal. Unknown. Coll. Hanley. 



6. Pectunculus cardiiformis, n. sp. (Plate XXXV. fi*s 6 

 6 a.) o ■ > 



Shell solid, subovate, ventricose, subequilateral, equi valve, white 

 variously mottled with brown and purple, the markings here and 

 there being small, c ose together, and of a zigzag character, especi- 

 ally towards the umbones, whilst nearer the centre and towards the 

 base they form several irregular concentric zones or bands, the dorsal 

 area being crossed by similar but more regular bands of a darker 

 colour, whilst a fexv small triangular white spots occur amongst the 

 brown markings ; valves ornamented with between forty and fifty 

 small prominent rounded ribs, the interstices between which, as well 

 as the ribs themselves, are crossed by very fine close-set raised striae 

 that become somewhat scabrous towards the sides and base ; cardinal 

 area small and deep ; umbones prominent, incurved anteriorly; inte- 

 rior white stained with purple in front; margins strongly dentate 



Long. 17, alt. 18, lat. 11 lin. 



Hob. Unknown. Coll. Hanley. 



There is a second specimen in the late Mr. Taylor's collection 

 which is larger and of a lighter colour, with fewer purple marking • 

 whilst the angular white spots are larger and more numerous. ' 



Long. 21, alt. 20, lat. 134 lin. Coll. T. L. Tajlor 



Externally this fine shell has very much the aspect of a 



7. Pectunculus aureomaculatus, n. sp. (Plate XXXV. fig. J.) 

 Shell solid, roundly ovate, moderately convex, equilateral, equi- 

 valye ; white, variously clouded with bright orange patches and spots 

 and with two or three short flames of the same colour upon the dorsal 

 area ; valves with about twenty-five prominent, flattened, nodulous 

 radiating ribs, both the ribs and the interstices between them bem- 

 crossed by close-set, fine, raised, thread-like striae ; cardinal area very 

 small ; umbones moderate ; interior of valves white, stained with 

 purple. 



Long. 11, alt. 12, lat. 6 lin. 



Hab. Eastern seas? (Belcher). Coll. Hanley. 



8. Pectunculus taylori, n. sp. (Plate XXXV. fig. 8.) 

 Shell solid orbicular, moderately convex, very slightly compressed 

 and subangulate anteriorly ; greyish white, tinged with pale fulvous 

 in the centre, and irregularly spotted all over with dark purple short 

 descending flames, smaller and more numerous at the upper part • 

 valves with numerous flattened radiating ribs that become obsolete 

 towards the sides, and sculptured all over with very fine longitudinal 

 c.ose-set grooved lines ; umbones central, moderate ; cardinal area 



27 



