GUDE : ON NEW SPECIES OF PLECT0P7LIS. 215 



Plectopylis verecunda, n.sp. PI. IX, Pig. 4. 



Shell dextral, widely umbilicated, conoid, corneous, the nepionic 

 whorls shining, almost smooth, the later ones finely and regularly 

 ribbed, the riblets more pronounced above than below, covered with 

 a thin deciduous cuticle. Spire a little elevated, apex obtuse, suture 

 linear. "Whorls 7, increasing slowly and regularly, flattened above, 

 rounded at the side and below, subangulated above the periphery and 

 round the moderately wide, deep umbilicus, slightly dilated towards 

 the mouth, a little descending and abruptly deflexed in front. 

 Aperture crescent- shaped, oblique, margins a little convergent ; peri- 

 stome white, slightly thickened and reflexed, margins united by 

 a raised flexuous ridge, which emits a curved, entering, obliquely 

 ascending fold ; upper margin descending, outer basal and columellar 

 regularly rounded. 



Parietal armature composed of two vertical plates, the anterior 

 straight, giving off a short ridge anteriorly at the upper extremity and 

 another posteriorly at the lower extremity, giving that structure the 

 form of the letter \ ; the posterior plate curved, descending backwards, 

 with a short ridge posteriorly from its upper extremity. 



Palatal armature consisting of six folds, the first and sixth smallest, 

 nearly horizontal, low, the other four oblique, more elevated, second 

 longest, ascending at first, then horizontal ; third, fourth, and fifth 

 horizontal at first, then ascending, the latter with a small denticle 

 above its posterior extremity. Diam. maj. 13-5, min. 11 -25 mm. ; alt. 

 7 mm. 



Hah. — Phony-Tho. Type in my collection. 



Allied to the preceding species, but smaller, with a more conical 

 spire, deeper umbilicus, and the mouth not dilated laterally, and 

 furnished with an entering curved fold on the parietal wall. 



In its armature it differs in lacking the free fold above the anterior 

 parietal plate ; and this plate is straighter, and gives off posteriorly at 

 its lower extremity a much shorter ridge than in P. Messageri. It 

 differs further in the four palatal folds not being united by a callous 

 ridge, in the second fold being longer, and in having a denticle 

 posteriorly to the fifth fold. 



Plectopylis Goitldingi, n.sp. PI. IX, Fig. 1. 



Shell dextral, widely umbilicated, discoid, corneous, finely ribbed, 

 and decussated with fine spirals, and having, in addition, raised spiral 

 ridges, probably furnished with hairs in the fresh state. Spire flat, 

 apex low, suture a little impressed. AVhorls 6, a little convex above, 

 rounded at the side and below, subangulated above, increasing slowly 

 and regularly, last scarcely dilated towards the mouth, slightly 

 descending and deflexed in front. Aperture sub-ovate, oblique, 

 margins distant, united by a strong raised flexuous ridge ; peristome 

 whitish, a little thickened and reflexed ; upper margin arcuate, outer 

 and basal curved, columellar straight. 



Parietal armature composed of two vertical plates, the anterior 

 straight, giving off at the upper extremity a long horizontal thin fold 

 anteriorly and a short ridge posteriori^', while the lower extremity 



