OP CONCHOLOGY. 135 



whether this is anything more than a local variety of the fore- 

 going species." Kiener, acting on this opinion, united it with 

 P. Scorpio, adding that the only difference he could perceive 

 were the slight superiority in size, and the thicker and less nodu- 

 lose digitations. 



2. Digitations of labrum separated by secondary ones inter- 

 calated at the right margin. 



The validity of three species of this section is now no longer 

 questioned, but it must be confessed that, however readily they 

 may be recognized, some of their most distinctive characters have 

 not been alluded to in the diagnoses published. Without repeat- 

 ing characters generally given, they may be additionally dis- 

 tinguished as follows : 



6. P. MiLLiPEDA, Lam. ex Linn. 



Stromhus millipeda, Linn., Syst. Nat. ed. 12. p. 1208. 

 Pterocera millipeda^ Lam., Hist. Nat. An. sans Vert. ed. 2, 



ix, p. 673; Reeve, Mon. Pterocera, sp. 10. 

 Pterocera {3IiUipes) millipeda, Morch, Cat. Yoldi, p. 60. 

 Millipes millipeda, Adams, f. Gen. Moll, i, p. 261. 



Angle armed with four digitations, the uppermost (rarely null) 

 being an intercalated one ; posterior digitation simple ; lateral 

 digitations, especially the primary, much recurved ; lips with 

 wrinkles moderately developed. 



Half. — Philippine Islands. 



7. P. ELONGATA, Swains. 



Stromhus novem-daetylis insiructus, Chem., Conch. Cab. x, p. 



207, pi. 155, f. 1479, 1480. 

 Stromhus millipeda, var. B., Dillw., Cat. ii, p. 660. 

 Pterocera millipeda, part Lam., Hist. Nat. An. sans Vert. ed. 



2, ix, p. 673 (Syn. part ; not desc.) 

 Pterocera elongata. Swains., Exotic Conch., App. p. 32, 



Reeve, Mon. Pterocera, sp. 9. 

 Pterocera crocea, Sowb., Thes. Conch, p. 11, f. 4. 

 Millipes elongatus, Ad. f. Gen. Moll, i, p. 261. 



Angle armed with the three normal digitations ; posterior 

 digitation furnished with a lobe at its left base ; lateral digita- 

 tions straight ; lips with wrinkles well developed. 



Rab.—^ 



