of the Jurassic Bryozoa. 451 
Indeterminable Species. 
1. Proboscina Alfredi, Haime. 
Proboscina Alfredi, Haiime, 1854, Bry. Jur., Mém. Soc. géol. France, 
sér. 2, t. v. p. 168, pl. vi. fig. 8. 
Distribution —Bajocian, Germany. 
2. Proboscina ammonitorum (d’Orb.). 
Idmonea ammonitorum, @Orbigny, 1849, Prod. Pal. t. i. p. 288. 
Distribution.—Bajocian, France. 
3. Proboscina complanata (d’Orb.). 
Idmonea complanata, d’Orbigny, 1849, op. cit. t. i. p. 288. 
Distribution.—Bajocian, France. 
4. Proboscina divisa, Vine (non Btall.). 
Proboscina divisa, Vine, 1893, Polyz. Thrapston, Proc. Yorksh. Geol. 
Soe. vol. xii. p. 256, pl. xiii. fig. 8. 
Distribution.—Cornbrash, England. 
5. Proboscina elegantula (d’Orb.). 
Idmonea elegantula, d’Orbigny, 1849, op. cit. t. i. p. 288. 
Distribution.—Bajocian and Bathonian, France. 
6. Proboscina eapansa, Etallon. 
Proboscina expansa, Etallon, 1860, Jura Graylois, Ann, sci. phys. nat. 
Lyon, sér, 3, t. iv. p. 175. 
Distribution.—Corallian, France. 
7. Proboscina gracilis, d’Orbigny. 
Idmonea gracilis, VOrbigny, 1849, Prod. Pal. t. i. p. 317. 
Distribution.—Bathonian, France. 
Synopsis of Species. 
I. Zocecia all cylindrical. 
Peristomes well raised; zoarium flat .......... Jacquoti. 
Peristomes low ; zoarium in linear bands, mostly 
biserial, frequently branched .............. Cunningtoni, 
Multiserial, seldom branched. 
POMEL of osan, «, ) ox 0x el ete liasica. 
OSU RIOPC, %. a. oi. a6, atgit plain Sane aor os Eudesi. 
Zoarium in tufts and sheets ............ Rigauai, 
II. Zocecia pyriform. 
Perishomies well! raised»... si64 ek cee we elede os spatiosa. 
Peristomes low; zocecia long ................ Desoudini, 
Foccrar snort. 4 Suc a ee all ones morinica. 
