78 TRACHELIPODA. 



Plate XI. fig. 3. Shell chestnut-brown, with white bands 

 above; varix of the columella reddish, and somewhat stri- 

 ated. One inch long. Inhabits Trincomalee. 



Genus 4.— TEREBELLUM.— Zawiarci^. 



Generic Character. — Shell convolute, sub-cylindrical ; 

 apex pointed ; aperture longitudinal, narrow above ; base 

 emarginate ; columella smooth, truncated beneath. 



Terehellum suhulatnm. — The Awl-shapeb Terebel- 

 LUM. Plate XI. fig. 4. Shell cylindrical, thin, and glossy ; 

 spii-e subulate; columella smooth, truncate at the base. One 

 inch long. Inhabits the Indian seas. 



Genus 5. — CYPRiEA. — Linnceus, 



Generic Character. — Shell ovate or oblong-ovate, convex ; 

 margins involute ; aperture longitudinal, narrow, dentate on 

 both sides, effuse at both extremities ; spire very small, 

 generally hidden or covered in the perfect shells. 



Ci/prcea Exanthema. — The Measley Cypr.ea. Plate 

 XI. fig. 8. Oblong-ovate, brown, thickly studded with 

 round eye-like white spots ; dorsal line greyish ; marginal 

 teeth dark brown. Four inches long. Inhabits the West 

 Indies. 



Genus 6 — OVULA. — BruguierC' 



Generic Character. — Shell turgid, attenuated at both 

 ends ; margins convolute ; aperture longitudinal, narrow, 

 effuse at the extremities ; the iimer or columellar margin 

 without teeth. 



* Outer lip thickened, or wrinkled. — ** Outer lip smooth and ^^ithout 

 teeth. 



The shells of this genus are distinguished from Cyprasa by the want 

 of a spire, and the columellar lip never having plaits or teeth. 



Ovula oviformis The Egg-shaped Ovula. Plate 



XL fig. 5. Shell ovate, much inflated, ventricose in the 

 centre, very glossy, pure white ; extremities prominent ; 



