Cretaceous Gastropoda, and Pelecyiooda from Zululand. 93 
The Distribution Table, setting forth the various species of Gas- 
tropods and Pelecypods found in the Manuan Creek and False 
Bay districts of Zululand, will serve to illustrate the actual occur- 
rence of such forms or their alliances in India and other geologically 
related countries. Eegarding only, for the time being, those species 
from the Manuan Creek we may mention among the Gastropods 
the occurrence of a new form of Gyrodes which is related to 
G. pansus of Stoliczka found in all three divisions of the Indian 
Cretaceous and which appears to be allied to G. euryomphala, 
Philippi, from the Senonian of Chili and to Meek's G. conradi 
recorded by Stanton from the Turonian of Colorado. 
The new species, Architectonica Iwssmati, would appear to be 
distantly related to a Campanian form described by Mr. Etheridge, 
from Umkwelane Hill and a form of probably older horizon from 
the Umsinene Eiver district of Zululand. There is also described 
a new Turritella, showing slight affinities with T. nodosa of Ecemer, 
which Stoliczka has acknowledged as occurring in the Utatur group 
of Southern India ; the new species may also be compared with 
Zaria (?) sp. of Etheridge from the Umsinene deposits. Then 
again the fragmentary example of Drepanocheilus exhibits a re- 
lationship with Bostellaria calcarata of J. Sowerby, a well-known 
species found in the British Albian, whilst the form of Avellana 
suggests a close connection with James Sowerby's A. incrassata 
belonging to Albian-Cenomanian times. Selecting some of the 
more striking forms of Pelecypoda, there is the Gucullcea ivoodsi 
which is related to Parkinson's G. glabra of the Albian rocks ; 
Trigonarca sp., a shell related to CuctdlcBa rugosa of Holzapfel from 
the Emscherian deposits of Germany ; Trigonia cricki, related 
to T. tuherculifera of Stoliczka found in the Trichinopoly group 
of India, is undoubtedly closely connected with T. aliformis from 
Albian and Cenomanian deposits ; a new form of Ostrea (zululandice) 
of small size shows certain affinities with Nilsson's curvirostris 
of the European Campanian as well as with a shell from the 
Cenomanian of Brazil which White has doubtfully recognised 
as C. luegmanniana of Orbigny ; Exogyra conica of J. Sowerby, 
occurring as well in the False Bay deposits, ranges from Albian 
to Cenomanian, and is known from Britain, Europe, and North 
Africa, but not from India ; Neithea quadricostata is Albian and 
Cenomanian, its Indian occurrence being included under quinque- 
costata by Stoliczka, the shell being also known from Afghanistan, 
Madagascar, Brazil, Syria, Arabia, Europe, and Britain ; Neithea 
quinquecostata is more cosmopolitan in its geological distribution, 
as it occurs in all three divisions of the Indian Cretaceous besides 
