544 Br. H. Woodward — On Fossil Shells from Sumatra. 



71. Xenophora agglutinans f Lamk. PI. XV. Fig. 2. 



The want of all trace of the exterior surface of this shell 

 precludes our determining it with precision. It may, however, 

 be compared with the Xenophora agglutinans, Lamarck, figured 

 by Dr. K. Martin in his work on Javan Fossils (tab. xii. fig. 6), 

 and with Vicomte D'Archiac's figure of the Trochus cumidans, Brong. 

 (Foss. Numm. de l'lnde t. xxvi. fig. 16). The portion preserved 

 shows 5 to 6 whorls, on which numerous foreign bodies had been 

 agglutinated during the growth of the shell. 



Dimensions: — Height 35 mm. ; breadth 45 mm. 



Formation and Locality : — Found with the preceding species. 



72. Natica, sp. (cast). PI. XV. Fig. 3. 



This is an imperfect cast of the last whorl of a large and very 

 tumid species of Natica ; but the want of the spire and any external 

 shell-layer necessarily prevent any accurate description of this fossil. 



Formation and Locality : — Found with the preceding species. 



73. Turbo (Senectus) setosus? Gmelin, Operculum of. PI. XV. Fig. 4. 

 This is almost identical with the operculum of Turbo setosus, 



Gmelin, a species at the present time found living in the Pacific. 

 The differences are so slight that they may be treated more as indi- 

 vidual peculiarities than as of specific value. The short granular 

 ridges, for instance, on the exterior, near the inner side just above a 

 groove parallel with the extreme margin, are coarser, and the sur- 

 face, from the centre to the opposite or outer margin, is less raised, 

 and more coarsely granulated than in the normal form of this oper- 

 culum. Both have an orange-red stripe bordering the outer edge. 



Dimensions : — Greatest diameter 27 mm.; shortest diameter 25 mm.; 

 thickness 13 mm. 



Formation and Locality :-^Found with the preceding species. 



74. Cassis, sp. (cast). PI. XV. Fig. 5. 



At first sight this cast appears to be that of a Natica, with a some- 

 what produced spire ; but on examining the specimen closely, we at 

 once detect the impressions of denticulations ' on the interior of the 

 outer lip so characteristic in the genus Cassis. 



Cast of shell ventricose, spire slightly produced, aperture long, 

 auriculate, outer lip denticulated. 



This fossil may be compared with the Cassis Herldotzii of Dr. 

 Martin (Die Tertiarschichten auf Java, tab. viii. fig. 7), and also 

 with the figure of Cassis subl&vig aster, D'Arch. (D'Archiac and Haime, 

 Foss. Numm. de l'lnde, PI. 31, fig. 4). 



Formation and Locality : — Found with the preceding species. 



75. Nerilina subfossilis, H. Woodw. PL XV. Fig. 6, a, b. 



Shell somewhat globose and auriculate, with a depressed and 

 nearly obsolete spire ; surface smooth and shining, 2 body-whorl 



1 In figuring this fossil PI. XV. Fig. 5, the mouth-view only is given, so that one 

 cannot see from the drawing the crenulations or denticulations on the cast, marking 

 what was the character of the interior of the outer lip. 



2 This coloration in the figure (see PL XV. Fig. 6, b) unfortunately conveys to 

 the eye rather the appearance of corrugations or cross-ridges, hut the surface is 

 really quite smooth. 



