1896.] MICROSCOPICAL JOURNAL. 23 



Pores disposed iu obli(|ne rows dolioluin 



Pores in thorax iu oblique, in abdomen iu trausverse rows cingulata 



183. THEOCORYS. 



Cephalis with slightly carved horu, half as loug as the shell scolopax 



Cephalis with cylindrical horn, half as long as the shell bachabunda 



Cephalis with short oblique, conical horn attenuata 



Cephalis with oblique pyramidal horn of same length obliqua 



Cephalis with conical horn 3 times the length alauda 



Cephalis with conical horn of same length spha;rophila 



Cephalis with cylindrical horn twice the length tuberculata 



184. LOPHOCORYS 



Cephalis with 1 pyramidal and 3 small horns acanthocephala 



Cephalis with 2 pyramidal horns bicornis 



185. THEOCAMPE. 



Pores in thorax in alternating, iu abdomen in .5-6 transverse rows pirum 



Pores in transverse rows, 3 in cephalis, 6 iu thorax, 3 in abdomen nucula 



Pores in cephalis and thorax in oblique, in abdomen iu 10-12 transverse 



rows ovulum 



Pores quincuncially disposed, in abdomen 3 times as broad as in thorax 



versipellis 

 Pores oblique in cephalis and thorax, abdomen with longitudinal ribs 



gemmata 

 Pores quiucuucial, cephalis half hidden in thorax cryptocephala 



186. THEOCAPSA. 



Shell conical, cephalis with horn 3 times the length rathkei 



Shell pear-shaped, cephalis with horn of same length sarsii 



187. TRICOLOCAPSA. 



Thorax smaller than abdomen, shell with 2 indistinct strictures brownii 



188. STICHOPILIUM. 



Shell with 6 joints, thorax with 3 long wings or spines macropterum 



189. PTEROPILIUM. 



Third joints with 3 ribs prolonged into latticed wings sphinx 



Second joint with 3 ribs prolonged into wings with few pores bombus 



190. ARTOPERA. 

 Second and third joints with 3 wings, fourth with pyramidal spine loxia 



191. ARTOPHORMIS. 

 Nine ribs prolonged into 9 feet barbadensis 



192. LITHOSTROBUS. 



Shell smooth, with 6-8 slight strictures picns 



Shell thorny, with 5-7 slight strictures argus 



Shell smooth, with 4-6 deep strictures acuminatus 



Shell smooth, with 3-4 deep strictures microporus 



