f 
Belfast rasa ratalaii Buehatsi&g 4 Mlehoiotti Is a growth tom of 
0. annularis, judging by the description. I did sot find the type In 
far is. 
The spec imme determined by Bucimsalng m$ EtofesXettl at Boll astro ea r- 
ner opera (Linn. ) -and H. lamarcld i M* Idw* 4 H* are , according to- spool * 
men® bear lag these rams is the Museum of Bftior&l History at Turin, 
referable to Orb I ©oil a annularis . 
CL 
The type of Duncan* s Pyphastraea eostaift fro® Barbuda is pros® rood 
in the Geological Society of London and I studied it there* fh® spool- 
mm shows no noteworthy variation fro® the usual Orbi cella annularis , 
except its call#®® -art fro® 3 to 4 am; in disaster, usually 3* 5 «a. 
Another spa o 1 mm . » from Santo Domingo , labeled Cypftas trass cQstata , is 
m SoXsamstrea ; The specimens dot ©rained by Gregory as £. oostata war® 
studied in the British Kutteun of natural History! they are 0. annularis . 
Astra ©a bftrb a deaf.lt Duncan is sj specimen ©£ £; annularis fro® the 
Pleistocene rest® of Barbados; 
Gregory refers Holla at rape alt is si ma Duncan to tha synonymy of 
this specie**; but I doubt ths correctness of his eeneXueieit md stm 
treating it as sal id; 
Geologic dlstributioat Pleistocene, throughout the sis rated rmf 
* r#»f of the lost Indies* 
Dunean^hee listed Astern <►* the synonyms of 
* 
0. annul aria > fro® the mart formation of Antigua, remarking that It 
is*greatly altered by f ossiXisatieo} the ©alicul&r surface is mb* 
plans, and ths ealiees ar® soon as prominent columnar casts.** Should 
Duncan*© identification b@ correct* £. annularis emtends downward into 
the Ollgocen©* 
