672 DR. GWYN JEFFREYS ON THE MOLLUSCA OF THE [NoV. 14, 



mouth ohlong- ov&l : margin entire: inside glossy, showing the im- 

 pression of the radiating striae. L. 0'2, B. 0*15. 



'Porcupine' Exp. 1870: Atl. St. 16. Three specimens. 



This species dififers from T. fulva in being more raised and oblong, 

 as well as in the peculiar sculpture and position of the beak. 



*^ 4. Tectura pusilla \ Jeffreys. (Plate L. fig. 3.) 



Shell roundish-oval, somewhat depressed, rather thin, opaque 

 and lustreless : sculpture extremely numerous, crowded and regular, 

 delicate, minute striae, which radiate towards the margin as in other 

 species, and cover the whole surface : colour whitish : beak placed 

 at less than one third from the front margin ; it is slightly incurved 

 and pinched-up ; apex apparently deciduous : moutJi roundish-oval : 

 margin thin : inside smooth and glossy : scars indistinct. L. 0'125, 

 B. 0-1. 



'Porcupine' Exp. 1870: Atl. St. 16, 17a. A few dead specimens. 



t/' 5. Tectura adunca ", Jeffreys. (Plate L. fig. 4.) 



Shell oblong, raised but contracted near the beak so as to make 

 the latter more prominent, rather thin, opaque and lustreless : 

 sculpture, several fine striae which radiate towards the margin ; most 

 of them are alternately larger and smaller ; they do not extend to 

 the upper part of the shell : colour whitish : beak placed in front, 

 about one third of the whole length ; it is strongly incurved or 

 hooked, and has a subspiral and deciduous apex : mouth oblong : 

 margin thin, entire : inside smooth and glossy : head-scar semi- 

 circular. L. 0-2, B. 0-125. 



•Porcupine' Exp. 1870, Atl. St. 17a. A single and imperfect 

 specimen, but characteristic. Mr. Dall has seen it, and says it is 

 probably his Cocculina beanii. I will, however, retain provisionally 

 the specific name which I have given. 



Ball's species was dredged in the ' Blake ' Expedition off the 

 West Indies in 399-562|^ fathoms, and by Professor Verrill off the 

 coast of New England in 100-365 fathoms. 



(/ 6. Tectura GALEOLA^ Jeffreys. (Plate L. fig. 5.) 



Shell resembling an ancient helmet or casque, strong and 

 thick for its size, opaque and lustreless : sculpture, numerous and 

 close-set fine and minute radiating striae, which cover the whole of 

 the exterior ; there are also occasional and well marked lines of 

 growth, which are somewhat crowded towards the margin : colour 

 whitish : bealc small, incurved, and pointed, placed very near the 

 front margin and almost overhanging it : margin entire, compressed 

 and forming a rim on the front half: inside smooth: scars as in 

 Lepeta cceca. L. 0-225, B. 01 75. 



* Porcupine' Exp. 1870 : Atl. St. 24. A single specimen. 

 If the peculiar shape of this shell may be regarded as a generic 

 character, I would suggest for it the name Dallia, as a mark of respect 

 for the great malacologist Mr. Dall, who has examined my specimen. 



1 Tiny. ^ Hooked. . 



■' A hollow vessel shaped like a helmet. 



