356 MESSES. MELVILL AKD STANDBN ON [June 18, 



ScALA (Opalia) lamellosa Lam. 



Scalaria dathrus L. Syst. Nat. xii. 1769, 1237. 



M.C. Charbar, and other localities, not infrequent. 



Var. pseudoscalaris Brocchi. 

 I. Karachi. Among seaweed, low-tide mark. 

 We cannot separate this variety from Brocchi's Mediterranean 

 species. 



ScALA (Opalia) consoes Crosse & Fischer. 



I. Bombay (Abercroynbie). 



Some little doubt attaches to this name, the type being Australian, 

 but IS. 'perplexa Pease seems identical ; this last is merged by Tryon 

 (Man. Conch, ix. p. 74) into a variety of 8. lamellosa Lam., and 

 it would be perhaps best to treat S. consors likew^ise as subspecific 

 only. 



SCALA (Am^A) RAEICOSTATA Lam. 



P.Gr. Gulf of Oman, Maskat. From 10 fathoms, coral-sand. 

 Small, but quite adult, examples. 



SoALA (Cirsotrema) crassilabrum Sowb. 

 M.C. Charbar. 



ScALA (Cirsotrema) timbriolata Melv. 



P.Gr. Gulf of Oman. Two off Maskat, 10 fathoms, black mud. 

 One of these, constituting the most elegant and refined, perhaps, 

 of all the Mollusca collected by Mr. Townsend, is 52 mm. in length. 

 The whorls are not nearly so ventricose as in decussata Kien., and 

 the lamellae more delicately fringed. 



I. Karachi. Small, and not fully grown. 



SoALA (Cirsotrema) hidryma Melv. 

 I. Karachi. 



SoALA (Cirsotrema) kieneri Tapp.-Canefri. 

 Scalaria (Cirsotrema) decussata Kien. 

 I, Angrias Bank {Gapt. W. A. Tindall). 



SoALA (Acrilla) acuminata Sowb. 



I. Karachi, 15 fathoms, very rare. Bombay {Ahercromhie), 

 not infrequent, but fragmentary, in shell-sand. 



ScALA (Acrilla) minor Sowb. 

 Scalaria {Acrilla') gracilis A. Ad. non Sowb. 

 M.C. Charbar, 5 fathoms, mud. In colour of a darker brown 

 than is typical, lamellae more distant and fewer in number. 

 I. Karachi, 3 fathoms, among muddy stones. 



ScALA (Constantia) standeni Melv. 



L Karachi. Alsoin lat. 18°58']N'.,long.7P45' E. 40 fathoms. 



