230 SMITH : ON THE GENUS ASTARTE. 



It is smaller, less equilateral and consequently of a more . 

 oblique form, and both the anterior and posterior ends are 

 rounder. The hinder dorsal slope is more arcuate, and the 

 crenations within the margin are fewer. It is a smaller shell 

 than A. parvula of Searles Wood, with less acute beaks, the 

 posterior end is more rounded, and the edges of the valves are 

 strongly crenate; whilst of A. parvula the author states that the 

 margin in all the specimens "is free from the least appearance of 

 crenulations, as well in those which are the largest and presumed 

 to be full grown, as in the smaller and consequently younger." 

 The A. pitsilla of Forbes, is unknown to me and past all identifi- 

 cation from the inadequacy of the description. 



22.— ASTARTE PARVA Searles Wood. 



1840. Ann. Mag. Nat. Hist, p. 249. 



1853. Mong. Crag. Moll., p. 192, pi. xvii., f. 12a — b. 



1870. Jeffreys, Ann. Mag. Nat. Hist, vol. vi., p. 71. 



Habitat. — Sutton, Coralline Crag (S.Wood); Mediterranean, 

 50 — 100 fathoms (Jeffreys). 



" Hitherto known only as a tertiary species " (Jeffreys). I 

 have not had an opportunity of closely examining Mediterranean 

 specimens with those from the crag, and cannot therefore give an 

 opinion respecting their identity. 



23.— ASTARTE MIRABILIS Ball. 



1872. Rictocyma mirabilis Ball. Amer. Jour. Conch., 



vol. vii., p. 151, pi. xiv., f 6. 

 1874. Rhectocyma mirabilis Martens. Zool. Record, 1872, 

 p. 170. 

 Habitat. — North Harbour, Unga Island, of the Shumagin 

 Group, south of Alaska, in 8 fathoms, muddy bottom (Ball). 



This and the two following species, which were unknown to 



J.C., iii., October, 1881 



