5/8 DR. GWYN JEFFREYS ON THE MOLLTJSCA OF THE [Junel7' 



1 1 . Leda striolata, Brugnone. 



Toldia striolata, Bruga. Misc. Mai. (pars secunda, 1877), p. 9, f. 9- 



Y. abyssicola, Seg. Nuc. terz. d'lt. (1877), t. v. f. 28, 28a. 



' Lightning ' Exp. : St. 3. 



'Porcupine' Exp. 1869: St. 39, 42, 47. 1870: Atl. 3a, 9, 16, 

 17, 17a, off C. Espichel, 22, 24, 31-34. 



Distribution. Palermo; 114 fms. 



Fossil. Pliocene. Calabria and Sicily. 



Differs from the last species (L. lentir.ula) in being flatter, more 

 sharply pointed or wedge-shaped at the anterior end, and concentri- 

 cally striated ; the striae are regular and sometimes numerous, but 

 usually distant and covering the front only. The epidermis in living 

 specimens is yellowish-green. Striolata is not a classical word ; and 

 I had provisionally named this species acutalis, but of course give 

 way to the previous publication. Monterosato gave it the MS. name 

 of producta. 



12. Leda intermedia, M. Sars. 



Portlandia intermedia, (M. Sars), G. O. Sars, Moll. reg. arct. 

 Norv. p. 38, t. 4. f. 9, a-b. 



' Porcupine ' Exp. 1 870 : Atl. St. 1 6. A few valves, mostly imperfect. 



Distribution. Greenland, Spitzbergen, ' Fox ' Exp., Novaya 

 Zemblia, Norwegian arctic Exp. 1878, Dutch arctic Exp., Finmark ; 

 25-1333 fms. 



Not a North-Pacific species which I received from Mr. Dall as 

 the Yoldia intermedia of Sars on the authority of the late Dr. Philip 

 Carpenter. 



i/ 13. Leda lucida, Loven. 



Yoldia lucida, Lov. Ind. Moll. Scand. p. 34. 



L. lucida, B. C. ii. p. 155 ; v. p. 173, pi. c. f. 1. 



'Lightning' Exp.: St. 1, 2, 3, 5. 



'Porcupine' Exp. 1869: St. 9, 13, 14, 15, 16, 19, 22, 28,62. 

 1870: Atl. 1, 2, 3, 3a, 9, 13, 16, 17, 17a (var. declivis ; anterior 

 end more sloping and not so much upturned nor pointed), l/b (var. 

 truncata ; anterior end abruptly cut off) ; Med. 55. 



Distribution. Swedish arctic Exp. 1868, 'Valorous' Exp., No- 

 vaya Zemblia, Norwegian arctic Exp. 1878, Finmark to Bohuslan, 

 Palermo, G. St. Lawrence to Massachusetts B. ; 10-730 fms. 



Fossil. Post-tertiary or " glacial." Norway, and Clyde beds. 

 According to his description and figure, Seguenza's Yoldia lucida is 

 a variety of L. pellucida. The latter species differs from L. lucida 

 in being wedge-shaped and terminating in a point on the anterior 

 side ; L. lucida is in that part more or less upturned and squarish. 



The present species is L. obcsa of Stimpson. 



14. Leda pusio, Philippi. 



Nucula pusio, Ph. Moll. Sic. ii. p. 47. t. xv. f. 5. 



L. pusio, var. latior, Jeffr. Ann. and Mag. N. H. Nov. 1876, p. 430. 



'Porcupine' Exp. 1869: St. 16, 28; 1870, Atl. 3a, 16, 17a, off 



