8 R. Tate — Cenms of the Lias Invertebrata. 



Ilminsterensis (Moore), in having four rows of subspinous costulse. 

 Middle Lias. Down ClifiP, Cliarmouth. (Day-ColL, Geol. Surv. Mus.) 

 Cerithium suhfistulosa, nov. sp. — Related by its form and orna- 

 mentation to Chemnitzia fistulosa, StoL, and Turritella intBquicinctum, 

 Miinst. ; from the former it diifers in its serrated median rib, in 

 being proportionately broader, and in the absence of transverse 

 striae ; and from the latter chiefly in its fewer ribs. Marlstone. Eed 

 Mile, Lincolnshire. (Coll. Geol. Surv.) 



Cerithium raricostati, nov, sp. — Elongated, whorls 10, convex, 

 upper ones subangulated, with a broad and deep suture, ornamented 

 with about 25 strongly-curved, thick, transverse ribs, crossed by about 

 8 lamelliform costse. Zone of Ammonites raricostatus. Churchdown. 

 (Eev, F. Smithe.) 



Ghemnitzia trivia, nov. sp. — Shell elongated, of about 15 convex 

 whorls; closely allied to C. Carusensis (D'Orb.), but not so slender; the 

 posterior whorls with numerous, stout, oblique, not arched, ribs (the 

 anterior ones, occasionally with abruptly curved ribs), crossed by fine 

 longitudinal lines. Loioer Lias Limestone. Bridgend. {R. T.) 



Ghemnitzia complicata, nov. spec. — Whorls rounded, suture im- 

 pressed ; last whorl ornamented with about fifty thick oblique ribs, 

 which as they approach the anterior suture split up into fine raised 

 lines ; and about ten inequidistant longitudinal sulci ; those bound- 

 ing the posterior suture forming granulations. Base striated. Marl- 

 stone. Hyde, near Yeovil. (Geol. Surv. Mus.) 



Natica pilula, nov. sp. — Yery small, globose, spire depressed, 

 slightly convex, whorls 4 to 5, ornamented with fine longitudinal 

 lines ; aperture narrow. Upper Lias. Dumbleton, very abundant. 

 {Rev. P. B. Brodie, etc.) 



Trochus iiiconstans, nov. sp. — Very similar to T. turriformi, K. 

 and D., from which it differs chiefly in the variable form of the 

 whorls. Turreted, conical, apex acute ; whorls from 16 to 20, 

 smooth, flat, or with a broadly chanelled suture, or as sometimes 

 they are slightly imbricating. Lower Lias. Bridgend. (i2. T.) 



Solarium inornattim, nov. sp. — Very small, closely allied to 

 S. Thomsoni (Tate) ; orbicular spire obtuse, subdepressed, whorls 

 four, convex, smooth, shining with fine strias of growth ; base flat 

 with radiating wrinkles and striee ; umbilicus narrow, aperture sub- 

 quadrate ; columella straight, callously thickened in front. Middle 

 Lias. Chipping Campden. {Rev. P. B. Brodie.) 



Solarium lucens, nov. sp. — Differs from S. inornatum in its more 

 elevated and acute spire, and the raised margin bounding the an- 

 terior suture of the upper whorls. Whorls four, smooth, shining, 

 coarsely wrinkled ; reddish-yellow in colour ; last whorl sub-angu- 

 lated. Middle Lias. Mickleton. {Mr. Gavey.) The last two species 

 are provisionally referred to Sola/rium, and may, with some others, 

 belong to a genus not yet defined. 



Monodonta modesta, nov. sp. — Small, turbinated, conical, spire 

 short, comjDosed of four nearly flat, smooth, shining whorls ; suture 

 linear ; last whorl large, obtusely angulated ; base oblique and im- 

 perforate. Marlstone. Churchdown, Cheltenham. {R. T.) 



