394 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



temperatures 3S°.5 aud 40°. 2 aud statiou 4630, off Mariato Poiut, Panama Bay 

 iu 556 fathoms, saud, temperature 38°. 



The most striking thing about this species, apart from its oblique form, is 

 externally, the dark zone in the periostracum near the margin aud the clearly 

 distinguished lines of the hairs; internally the very great discrepancy between 

 the two adductor scars. 



Limopsis compressus Dall. 



Plate 7, figures 7, 8. 

 Limopsis compressus Dall, Proc. U. S. Nat. Mus., 1896, 18, p. 16. 



Shell large, thin, compressed, with a yellowish-brown, pale, pilose epidermis ; 

 surface reticulated with fine radiating striae and rather irregular elevated lines of 

 growth; beaks low, but conspicuous, small and swollen; area narrow, long, 

 about equal on each side of the beaks ; dorsal line straight, anterior end rounded, 

 posterior produced, rounded ; interior white, smooth, with plain margins ; pos- 

 terior adductor scar larger aud lower than the anterior ; ligament central, lozenge- 

 shaped, thin; hinge with about six posterior aud eight anterior teeth, small, 

 obscure, separated by a wide edentulous space, aud obsolete iu senile specimens. 

 Length of shell, 45; height, 37; diam. 17.5 mm., exclusive of the hair-like 

 processes of the periostracum. 



U. S. S. "Albatross," station 3382, Gulf of Panama, iu 1793 fathoms, mud, 

 bottom temperature, 36° F. Type, U. S. N. Mus. 122,889. 



Other stations are as follows : 



The most conspicuous features of this species are its thin shell, very large size, 

 short pelage, and pale color of the hairs. Iu general appearance it is not unlike 

 L. basii Smith, from New Zealand, which is smaller, more inflated, aud thicker. 



Limopsis jousseaumi Maiulle et RociiEnKUNE. 



Felicia jousseaunii Mabilie et Rochebrune, Mies, du Cap Horn, Moll., 1889, 6, p. H 116, 

 pi. 7, figs 9a, Db. 



Beagle Channel, Murray Narrows, Hyadcs ; U. S. S. "Albatross," station 

 2780, off the southern coast of Chile in latitude 53° 1' south, in 3G9 fathoms, 



