390 EET. B. BOOa WATSON ON THE 



reflexed ; but in your specimen they have more the appearance of 

 simple sharp folds or keels *. The other specimen somewhat 

 resembles my T. clavatus — thus far at least, that the ribs are pro- 

 duced in similar tooth-like protuberances ; but the ribs are more 

 numerous, the spire somewhat more elongated, and the form of 

 the " Cauda " cannot be ascertained. After all, I must consider 

 your specimens distinct from Northern forms. But, on the 

 other hand, I should not be unwilling to regard both specimens 

 as belonging to one species, and thus mere varieties analogous to 

 the forms T. clathratus and Gunneri. Tour specimens from 

 Kerguelen are in any case very interesting as representing, even 

 if not in my opinion an identical, yet at least a very similar and 

 strictly representative form of Trophon belonging to the Southern 

 hemisphere." 



4. TeOPHON ACIJLEATirS, n. sp. 



St. 122. Sept. 10, 1873. Lat. 9° 5' S., long. 34° 50' W. Off 

 Pernambuco. 350 fms. Mud. 



Shell. — Small, thin, porcellaneous white, fusiform, with a high 

 scalar spire, a blunt, mamillate, one-sided apex, a short conical 

 base, a long small snout, and angulated whorls crossed by con- 

 tinous thin, vaulted lamellae, projecting on the angulation of the 

 whorls into small sharp points. Sculpture. Longitudinals — there 

 are on each whorl about 12 vaulted lamellae, which run contin- 

 uously from below the apex to the snout ; between these are a 

 few fine lines of growth. Spirals — an angulation, strongly 

 marked by the projecting points of the longitudinal lamellae, 

 is in the middle of the whorls. CoZoz^r porcellaneous white. Spire 

 high, scalar. Apex small, blunt, mamillate, with the extreme tip 

 very much turned down on one side ; the 1| embryonic whorls 

 are tumid, rounded, and smooth. Whorls 6 to 7, with a straight 

 declining shoulder, angulated in the middle and conically con- 

 tracted below; the conical base is produced into a narrow longish 

 snout. Suture deep and angular. Mouth club-shaped, being 

 angulated above, and produced into the long narrow canal below. 

 Outer lip sharp, thin, and patulous on the edge ; it leaves the body 

 at a right angle, and is right-angled at the keel. Inner lip is 

 slightly concave above, straight on the very short pillar, and 

 oblique down the edge of the long canal ; a thin narrow glaze lies 



* I do not admit the distinction which Prof. Sars here mates. I consider 

 the longitudinal ribs in T. decUnans to bequite as certainly procumbent lamellae ; 

 only this feature is somewhat obscured by their being much chipped. — E. B. W- 



