176 



SCIENCE-GOSSIP. 



/3. 



/3. 



\'. Section SiNlcoi.A. 



A. Armature unknown . . 



B. Two transverse parietal plates. 



a. Shell 6 m.iii. . . 



b. Shell 16 m.m. 



C. One transverse parietal plate. 



a. Parietal denticles or folds none. 



U. Palatal folds in one series, parietal 

 horizontal fold at aperture. 



* Shell 6.5 m.m. . . 

 ^** Shell 9 m.m 



Palatal folds in two series 

 No horizontal fold at aperture. 



b. Two parietal denticles anterior to 

 transverse plate. 



OL. Whorls angular or keeled, palatal 

 folds six. 



* Whorls 4j, shell notexceedingf 7 mm. 

 ** Whorls'e. 



t Shell 15 m.m. . . 

 ++ Shell 12 m.m. 



Whorls rounded, palatal folds 7 



c. Two parietal denticles posterior to 

 transverse plate 



d. One or two horizontal folds in front ot 

 parietal plate. 



O. Shell acutely keeled. umbilicus 

 moderately deep ; two vertical denticles 

 between folds 



lO. Shellangulated, umbilicus very deep ; 

 one horizontal denticle between folds . . 



e. Two short horizontal folds in front of 

 parietal plate, with one to four denticles 

 between. 



Ct. Shell conical above, 62 — 7 whorls. 

 * Whorls rounded 

 Whorls keeled 

 Shell depressed, 5.? — 6 whorls 



f. One short horizontal fold above, with 

 four or five denticles below, in front of 

 parietal plate ; shell shining-, pellucid 



VI. Section Enteroi'lax. 



A. Palatal folds : /our. 



a. Horizontal parietal folds united by a 

 vertical ridge posteriorly 



b. Parietal folds not united . . 

 Umbilicus moderate .. 



j'ttzatoria. 



alphonsi. 



vnllata. 



dif'ty cilia, 

 hi/'cris. 



mvia. 

 si'ctifa. 



schistoptychia 



13. 



eiiioneiis. 



Jiiiil'riosa. 



azona. 



puh'inaris. 



cutiscidpta. 



reserata. 

 laniiiii/era. 



stcnochila. 

 V. basilia. 

 tinirnta. 



iiniltispira. 



a. 



p. Umbilicus narrower . . 



B. Palatal folds : ten 



\'II. Section Svkesia. 



A. One transverse parietal fold. 



a. Notched about the middle, a short sup- 

 port posteriorly above. Ceylon. 



(1. Umbilicus wide ribs and lyrae 

 prominent 



p. Umbilicus narrower ribs and lyrae 

 obsolete 



b. Not notched. 



U. Straight, without support, umbilicus 

 still narrov.er. Habitat, India . . 

 p. Sinuous, with a short support an- 

 teriorly above ; umbilicus still narrower. 

 Habitat, India 



B. Two transverse parietal plates. 



a. Shell flattened, no fold below umbilical 

 angulation, umbilicus still narrower, 

 Habitat, Ceylon 



b. Shell conoid, with a double fringe of 

 curved hairs; a horizontal fold below 

 umbilical angulation ; umbilicus still 

 narrower. Narrowest of all. Hab.. Ceylon 



qiiadrast. 



troc/iosptra. 



V. hohohnsis. 



polyptychia. 



clathraiida. 

 \. conip7-essa. 



rla th vatuloidcs. 



retifcra. 



cn/iginosa. 



hiriliiita. 



V. 

 V. 

 V. 

 V. 

 V. 

 V. 



Index 'jo Plectopylis. 



The roman figures after the names indicate the volume 

 of SciKNCE-GossiP New Series, page is in ordinary type, and 

 number of figure is in italic type. 



achalina. v., 114. So, Sr, S'2. 



bieviplica, v., 134, Sj. 



castanea, v., 134, S6. 



infrafasciata, v., 133, S4. 



obesa, v., 115, Sj. 



repercussoides, \-. , 333. 



venusta, v., 134, 8j. 

 affinis, iii., 276, .//. 

 alphonsi, v., 239, g^. 

 andersoni, iii., 154, ry. 

 anguina, v., 76, 79. 

 austeni, vi., 15, 97. 



AUSTEN/A, I/I., 300, 332, r/., 149. 



azona, iii., i8o, 204. 



biciliata, vi., 16, gg. 



biforis, iv. , 103, 57, 



Ijlanda, iv., 264, yo. 



brachydiscus, iii., 154, iS. 



biachyplecta, iii., 246, 77. 



brahma, iv. , 170, 6j. 



hiirijiaiiica, iii, 245. 



caiin.si, v., 171, go. 



caliginosa, vi., 75, 100. 



cat inns, iii., 244. 

 Chersaecia, VI., 148. 



clathratula, iii., 300, 42. 

 V. compressa, vi., 75, loi. 



clathratuloides, iii. 332, 44. 



congesta, v. , 332, gb. 



cutisculpta, iii., 180, 6. 



cyclaspi.s, iii., 244, j^ 



dextrorsa, iii., 156, 21. 



diptychia, iv., 2S4, 7/. 



emoiiens, iv. , 36, 50. 

 Endoi'LON, VI., 14S. 

 Endothyra, VI., 148. 

 Enteroplax, VI., 149. 



eugeni, v., 172, g2. 



feddeni | '\"-' 7^' ^^• 

 I VI., 76, 104. 



fimbrio.sa, iii., 179, 24. 



V. nana, iv. , 180. 



fran9oisi, vi., 75, ro2. 



fultoni, iii., 178, 2^. 



giardi I ^V 332, 95- 

 ^ \ VI., 76, IPS- 



hanleyi, v., 240. 



( 181, 28. 



invia, ni. 



• 204. 



jovia, iv., 138,59. 



jugatoria, v., 240. 



karenorinn, iii., 244, y. 



lacythis ( Nanina), v., 115. 



lamcabensis, v., 171, gi. 



larninifera, iii. , 204, jo. 



laomontana, iii., 245, 76. 



leiophis, v., 16, 76. 



leucochila, iv. , 231, 66. 



