UNIDENTIFIED LIMPETS. 155 



P. MALICOLOR Dufo (Ann. Sci. Nat. (2) xiv, p. 205). Make Sey- 

 chelles. Unidentified. 



P. DIEMENSIS Philippi. 



Shell ovate-elliptical, convex conic, rather solid, whitish, having 

 about 54 brown grooves; interior white, margin crenulated, the 

 inside marked with brown dots at the crenations; apex at two- 

 fifths of the length. Length 16J, breadth 14, alt. 8 lines. (Phil.} 



Hobarttown, Tasmania. 



P. diemensis PH., Zeitschr. f. Mai. 1848, p. 162. 

 Compare Helcioniscus limbata and tramoserica. 



P. CRASSA Lesson ( Voy. de la Coquille, Zool. ii, p. 413, 1830). A 

 very thick, massive species, measuring, length 3t, breadth 3, alt. 

 If inches. 



Said to be from New South Wales. 



P. COSTATA Lesson, (Voy. de la Coquille, Zool. ii, p. 415, 1830). 

 The summit is said to be recurved posteriorly ; sculptured with 

 radiating stride fine above, wide at the edge, surmounted by lamellae. 

 Outside green, surrounded with blackish toward the apex, having 

 the elevations on the ribs bright chestnut. Inside golden red in the 

 middle, silvery outside, rayed with blackish-purple at the positions 

 of the ribs. Length 12, breadth 9, alt. 3 lines. 



Island of Burn, Moluccas. 



P. BOUROUXIENSIS Lesson, (Voy. de la Coq. Zool. ii, p. 415, 1830). 

 Much depressed, oval, white, with black ribs outside, etc. Summit 

 much posterior. Length 14, breadth 12, alt. 3? lines. 



Bay of Cajeli, Burn. 



P. CROCATA Lesson (Voy. de la Coq. Zool. ii, p. 415, 1830). 

 Irregularly oboval, little elevated, not thick, summit conical, nearly 

 central, margins thin and angulose. Covered with close little ridges 

 separated into little groups by shallow, spaced grooves. Color whit- 

 ish with purple-violet rays. Inside white, tinted with yellow and 

 silvery. Center saffron-yellow ; border spotted with purple. 



Length 11, breadth 10, alt. 4 lines. 



Port Praslin, New Ireland. 



P. CONCEPSIONIS Lesson (Voy. de la Coq. Zool. ii, p. 418, 1830). 

 Evidently an Acmcea or a Scurria, perhaps A. variabilis (Sow.) Rve. 

 Province of Concepcion, Chili. 



