62 GOES, RETICULARIAN RHIZOPODA ON THE CARIBBEANSEA. 



Uvigerina diinorpha PARK, and JONES. 



Tab IV, figg.77 81. 



Though the designation of dimorpha applied to a Sagrina, which genus has been 

 founded on such a character, does not imply any specific distinction, we still retain 

 Messrs. PARKERS and JONES' name for this form, being by no means inclined to enrich 

 our nomenclature. 



Its early uvigerina-stage is often reduced to a couple of chambers, and it would 

 sometimes be hard to recognise the small egg-shaped bodies without any traces of 

 septal marks as Uvigerina, if the somewhat prolonged mouth-necks did not betray its 

 affinity to this genus. 



Our form is highly agglutinant, constructing its shell of the finest chalkdebris 

 and detritus. Its original form is mostly narrow cylindrical, but it seems to accumu- 

 late with age a thick deposit of loosely cemented detritus, so that it becomes egg- 

 shaped with a somewhat rough and chalky surface. 



It seems likely, that this species has been confounded by some authors with Cla- 

 vulina forms. Clavulina cylindrical HKEN. and KARRER is probably identical with it, 

 perhaps also Glandulina rudis of COSTA. 



It is not uncommon on the chalkbottom and attains 34 mm. in length. 



Figg. 77 78: the slender form. 



Figg. 79 80: the eggshaped one. 



Fig. 81 apertural side. 



Syn. Uvigerina dimorpha (Sagrina) PARK, and JONES, 1865, Phil, trans. 155. 1, t. 18, fig. 18. 



Glandulina rudis COSTA, 1855, Marna terz. Messina; Mem. Nap. 2, p. 142, t. 1, fig. 12. 



Clavulina cylindrica HKE., 1875, For. Clav. Szab. Sch. p. 18, t. 1, fig. 8. 



i) KAHR., 1877, k. k. osterr. geol. Reichsanst. Abb. 9, p. 373, t. 16, fig. 4. 



PHaplophragmiTim verruculosum GUMB., 1871, Ulmer Cera. Mergel; Munch. Ak. Sitz.-Ber. 1, p. 63, 



t. 1, flg. 1. 

 PGlobulina fragaria GUMB., ibid. p. 68, t. 1, fig. 16. 



/ 



Appendix. 



Sagrina virgula BRAD., 1879, Notes on Ret. Rhizop. Challeng. Exp.; Qu. Journ. Micr. Sc. 



(n. Ser.) 75, p. 275, t. 8, figg. 19-21. 



divaricata BRAD., ibid. p. 276, t. 8, figg. 2224. 



