524 MAZATLAN TOIVALVES 



Tablet 2501 contains a magnificent, uncleaned specimen, 

 with operculum. 2502, an operculum differing from the rest 

 in having the inner edge more truncate, and the corrugations 

 irregular. It may be an abnormal form of this species, or 

 may belong to Ph. bicolor. 



669. PHYLLONOTUS BICOLOR, Veil. 



Murex bicolor, Vol. in Humb. fy Bonpl. Rec. Obs. p. 301. 



Eve. Conch. Ic. pi. 11, f. 41 Kien. Icon. Conch, p. 67, no. 48, 



pi. 28, f. 1. Sow. Conch. III. no. 91. Mke. in Zeit.f. Mai. 



1850, p. 187, no. 70. 

 Murex erythrostomus, Stvams. Zool III. series ii. vol. ii. pi. 73. 



Desk, in Lam. An. s. Vert. vol. ix. p. 610, no. 81. 

 Murex regius, ScJmb. fy Wagn. in Chemn. Suppl. vol. xii. 



p. 133, pi. 230, f. 4066-7, (non Swains.) 

 Var. = Murex hippocastanum Phil. Ic. pi. 1, f. 2, (teste Eve. 



non Linn.) 

 Vide Kust. Mart. pi. 5, f. 1, 2. 



Shell closely resembling M. imperialis, Swains. (Lam. An. s. 

 Vert. vol. ix. p. 611, no. 82,) ; with 6 varices, each having a pos- 

 terior canal, an adjacent open spine, and about 8 others behind 

 the labrum, which is deeply denticulated. Between each 

 varix is a false varix with about 4 spiny tubercles. Surface 

 foliated behind the posterior canal. Outside covered with 

 extremely fine spiral striae, decussated by equally fine lamina? 

 of growth which are undulated by the striae. Labium expanded, 

 raised, and, with the mouth, pink. Siphonal canal greatly 

 bent, nearly covered, scarcely leaving an umbilicus. Long. 5 '8, 

 long. spir. 1*6, lat. 4', div. 100. 

 Sab. Gulf of California ; on mud banks at low water ; Lieut. 



jBabb. Acapulco, Humloldt fy Bonpland. Mazatlan ; very 



rare ; L'pool fy Havre Coll. 



Tablet 2503 contains one of the three sp. which alone were 

 found in the L'pool Col. Several specimens in the London 

 shops were probably from the Havre Col. 



670. PHTLLONOTTJS BEGIUS, Swains. 



Murex regius, Swains, in Bligh Cat. p. 16, no. 201, 806 (non 

 descr.) Wood, Ind. Test. Suppl. pi. 5, f. 13. Sow. Conch. 

 III. Cat. no. 89 Kien. Icon. Conch, p. 65, pi. 42, 43, f. L 



