430 A. M Verrlll — 3follusca of the New England Coast. 



minal, and strongly curved to the left, with the nucleus smooth, 

 glassy, and incurved, situated at some distance from the margin. 

 The surface of the shell is covered with numerous strong, irregular, 

 concentric undulations, and by much smaller and finer lines of growth, 

 which are crossed by microscopic, interrupted, radiating lines, giving 

 a very finely reticulated appearance. 



Length of the shell, IS'S™""; breadth, 8-5™"'. 



Station 2262, off Martha's Vineyard, N. lat. 39° 54' 45"; W. long. 

 69' 29' 45", in 250 fathoms, green mud and sand ; bottom temper- 

 ature 42° F. One living specimen. (No. 40,503.) 



Glaucus margaritaceus (Bosc). 



Glaucus Boscii Lessou, Voyage, la Coquille, Zoologie, vol. ii, p. 288, 1830. 



Station 2221, K lat. 39° 05' 30"; W. long. 70° 44' 30". One im- 

 mature specimen. Station 2224, N. lat. 35° 16' 30", W. long. 68° 21'. 

 One adult and three young. 



This species agrees very closely with the description of Bosc, as 

 quoted by Lesson, op. cit., p. 283. 



Heteeopoda. 



Firoloidea LeSUeurii (D'Orb.) Eydoux and Souleyet. 



Voyage, La Bonite, Zoologie, p. 342, atlas, pi. 16, figs. 5-7. 



Station 2038, 25 specimens; 2039, 5 spec, 1883; 2174, 2 spec; 

 2194, 12 spec; 2207, 6 spec. ; 2235, 1 spec, 1884. The most northern 

 locality was 2194, N. lat. 39° 43' 45"; W. long. 70° 07'. 



Oxygyrus Keraudrenii (Lesueur). 



Edoux and Souleyet, Voyage, la Bouite, Zoologie, p. 364, atlas, pi. 18, figs, 1-17. 

 Oxygyrus Keraudrenii H. and A. Adams, Genera Recent Moll., vol. ii, p. 92 ; vol. 

 iii, pi. 69, figs. 6-6&. 



Station 2195, N. lat. 39° 44', W. long. 70° 03', 1884. One living 

 specimen of good size, at the surface. 



Pteropoda. 

 Styliola striata (Rang). 



Creseis striata Rang, Ann. dos sol. nat., vol. xiii, p. -i];:*, pi. 17, fig. 3. 



Gleodora striata Rang and Souleyet, Hist. Nat. Moll. Pteropodes, p. 55, pi. 6, fig. 3, 



1352. 

 Souleyet, Voyage, la Bonite, Zoologio, vol. ii, \^. 191, atlas, pi. 8, tigs. 1-4. 



