OF CONCHOLOGY. ^ jS 



TuRBONiLLA ELONGATA, Pease. Plate 24, fig. 22. 



Description. — T. elongata, turrita, gracilis, alba ; longitudi- 

 naliter regulariter criberrime costata, transversim striata ; anfr. 

 14, convexis, univaricosis ; sutura bene impressa ; columella 

 infra tortuosa ; labro extus late varicoso, intus forte lirato; 

 apertura quadrato-ovalis. 



Dimensions. — Long. 19, diam, 4 mill. 



Locality. — Paumotus. 



Shell elongate, turrited, slender, white, longitudinally regu- 

 larly and closely ribbed, transversely striate ; whorls fourteen, 

 convex, furnished with a simple varix on each whorl; suture 

 well impressed ; columella twisted below ; lip widely varicose 

 on its outer edge, strongly lyrate within ; aperture squarely 

 oval. 



The above species approaches T. grandis, Ad. and Rve. Its 

 characters are not developed until it attains maturity ; such may 

 be the case with T. grandis. The lip of large sized specimens 

 is thin and simple, similar to that of most species of this genus. 

 The ridges within are not formed until after the lip is thickened 

 externally by a varix. At the base of columella the aperture is 

 apparently slightly effuse. 



In sculpture, general shape and form of aperture, it is a true 

 Turhonilla. For reason of its peculiarities I propose to separate 

 it from the Turhonilla proper, under the subgeneric name of 

 Lancea. 



T. grandis probably included. 



Stylifer deformis. Pease. Plate 24, fig, 23. 



Description. — T. tenui, laevigata, nitida, pellucida, alba, lono^- 

 itudinaliter obsolete striata ; anfr. 6-10, rotundato-convexis, ad 

 suturam anguste marginatis, ultimo ventricoso ; spira parva, 

 contvacta, distorta, apertura oblongo-ovata, subeffusa ; labrum 

 ad basim vix reflexum. 



Dimensions. — Long. 12, diam. 4 mill. 



Locality. — Paumotus. 



Shell light, thin, smooth, shining, pellucid, white, indistinctly 

 striated longitudinally ; whorls 6-10, roundly convex, narrowly 

 marginate at the suture, the last swollen ; spire usually much 

 contracted, very slender, distorted ; aperture oblong ovate, 

 slightly efiuse at base; inner lip slightly reflected. 



A light, fragile species. The shape of the columella can 



