KEPOET ON THE GASTEKOPODA. 113 



Scissurella crispata, Searles Wood, Crag. Moll. (Pal. Soc), vol. i. p. 163, pi. xv. fig. 13. 



„ „ Jeffreys, Brit. Conch., vol. iii. p. 283, pi. vii. fig. 2, and vol. v. p. 201, pi. Ix. fig. 3. 



„ ,, Weinkauff, Conch. Mittelm., vol. ii. p. 385, sp. 3. 



n ,, Monterosato, Enumerazione, p. 19. 



„ „ G. 0. Sars, Moll. Keg. Arct. Norv., p. 126, pi. viii. fig. 7. 



,, „ Seguenza, Form. Terz. Calabria, pp. 272, 320. 



„ „ Verrill, Additions to New England Mar. Moll., Trans. Connect. Acad., vol v. 



p. 533. 

 ,, ,, Jeffreys, Moll. " Lightning " and " Porcupine," Proc. Zool. Soc. Lond., 1883, 



p. 88, sp. 1. 



Station 24. March 25, 1873. Lat. 18° 38' 30" N., long. 65° 5' 30" W. Off Culebra 

 Island, West Indies. 390 fathoms. Pteropod ooze. 



Station 145. December 27, 1873. Lat. 46° 43' S., long. 38° 4' 30" E. Between 

 Marion Island and Prince Edward Island. 140 fathoms. Volcanic sand. 



Habitat. — From Greenland to New England and from Spitzbergen to the Mediter- 

 ranean, from 4 to 790 fathoms (Jeffreys), from 60 to 300 fathoms (G. O. Sars), 268 to 

 365 fathoms (Verrill). 



Fossil. — In later glacial beds, Norway (M. Sars). Middle and Upper Pliocene, Calabria 

 (Seguenza). Coralline crag, England (S. Wood). 



2. Scissurella alta, n. sp. (PI. VIII. fig. 1). 



Station 24. March 25, 1873. Lat. 18° 38' 30" N, long. 65° 5' 30" W. Off Culebra 

 Island, West Indies. 390 fathoms. Pteropod ooze. 



Station 75. July 2, 1873. Lat. 38° 38' N, long. 28° 28' 30" W. Off Fayal, Azores, 

 450 fathoms. Volcanic mud. 



Shell. — Globose, thin, transparent, strongly sculptured, with a tumid base, a small 

 umbilical chink, a short subscalar spire (on which the old canal slit forms the edge of the 

 successive whorls), and a smallish somewhat prominent rounded tip. Sculpture : Longitu- 

 dinals — frequent, strongish, rounded, curved riblets radiate out from the suture ; they are 

 of much the same strength on the base as above. Spirals — at about one-third of its 

 height from the suture the last whorl is carinated somewhat feebly by the old canal scar, 

 which is depressed and finely scored across between the narrow slightly projecting lip- 

 edges : on the upper surface a few very obsolete spirals may be seen ; the whole base is 

 reticulated by spiral threads, which 3 are closer set, but almost as strong as the radiating 

 riblets. Colour white. Spire rather depressed, conical, rising regularly to the extreme 

 tip. Apex round and prominent. WJiorls 5, flat and sloping above, carinated ; below the 

 carina towards the mouth slightly openly constricted and then tumid on the base. Suture 

 impressed. Mouth round. Outer lip freely curved. Inner lip thin, concave at the base 



(zool. CHALL. EXP. — PART XLII. — 1885.) Tt 15 



