97 



Like /-. jbiiorDiis, described by me in " Marine Shells of South 

 Africa,"' the shell exhibits no columella plaits. It differs from 

 that species in form, as well as in having two rows of tubercles on 

 the body whorl- The " imbricated " character from which I have 

 given this species its name consists chietly in its periostracum, 

 but here and there thin, shelly scales are also visible. 



Tusus suLcoxTKACTL-s, n. sp. ( i'late 11- lig. 2)- Shell rather 

 elongately fusiform, pale yellow. Spire acutely turreted; whorls 

 9, angularly convex, spiral!}- closely lirate, keeled at the angle and 

 armed with narrow angular tubercles, passing into short, slightly 

 raised ribs above and below; suture closed, waved; last whorl 

 about two-thirds of the entire length of the shell, almost con- 

 cavely sloping to the angle, which is very prominent, the 

 tubercles becoming larger and more distant, and the ribs below 

 the angle more prominent, while those above are evanescent ; 

 rostrum moderately long and tapering- Aperture subovate : in- 

 terior white, smooth ; outer lip rather thin, with a slight callous 

 thickening, inflexed at the entrance to the anterior canal; colum- 

 ella nearly straight; canal straight, rather narrowly open. 



Length, 40; width (at angle), 18 millim. 



Hab. :— Cape Natal W. by N. | N., distant 1 1 miles. Depth, 200 

 fms. Bottom, sand and mnd. Procured by shrimp trawl. 



vVn interesting shell, somewhat resembling an extremely 

 argular form of /'". rostraitis, Olivi. dlie curious contraction and 

 inliexioii of the lip at the entrance of the canal appears to be 

 charaetetistic ; although only having seen a single specimen, I 

 cannot be certain of this. It looks like a modification of the same 

 character that is seen in F. ciausicaiidatus hinds (a South Airican 

 species of which only t)ne specimen is known), where the in- 

 flexion of the lij) almost closes the canal and continues through- 

 out its length. 



Ancilla oiiTUSA, Swainson, ]Monog. 2S2. Sowerby. Thes. 

 Conch, vol- iii. p- 62, pi. 211. figs. 15, 16 (shell). H- & A. Adams, 

 Genera, Plate xv. fig. 7 (animal). Three s]:)ecimens by dredge. 

 Algoa Bay. Lat., 33°5o' S-; long., 25°54'3o" E- Depth. 24 fms. 

 Bottom, sand, shells, and rock. 



\ OLUTiLiTiiES APA'SsicoLA, Adauis and Keeve, Zool- Samarang 

 Moll. p. 25, pi. vii.;, fig. 6; Watson, Gastropoda of Challenger 

 Exped- p. 285, pi- XV., fig. I (shell); JNI. T- Woodward, Proc. 

 Malac. Soc- vol. iv. p. 121, pi- x. (anatomy). 



Four specimens got in shrimp trawl. Lat-, 34''43'i5" S. ; long-, 

 i8°3o' E. Depth, 125 fathoms. 



This interesting species was originally described from a '. e:v 

 young shell, which remained unique until fully gr(3wn specimens 

 were obtained in the \'oyage of the Challenger- It was at that 

 time the only known recent example of a genus w ell known and 

 pretty abundant among the Eocene and Miocene foisih oi 



