THE ]{ESULTS of -DEEP 8EA INVESTIGATION in the 

 TASMAN SEA. 



I.— THE EXPEDITION of H.M.C.S. "MINER." 



4. FoR.VMINIFEKAL SaXD DuED(iKD TwEXTY-TWO MiLES 



E.vsT OF Sydney at a Depth of Eighty Fathoms. 



By E. J. GoDDARD, B.A., B.Sc, Biological Laboratory, Sydney 



Universit}'. 



(Figs. -t4-4S). 



The sand contains a good variety of forms. In the appended 

 list the chief forms present are mentioned. This list is nut a 

 complete one, inasmuch as in the abundant material at hand ad- 

 ditional forms must be present. It is intended to complete the 

 list subse(|uently. 



The material contains beautiful glauconite casts. This mineral 

 (a hydrous silicate of potash and iron) is very noticeable as in- 

 fillings in the species of Ltaietia, certain members of the Rotalida?, 

 and es[)ecially in the members of the Globigerinidse. The restric- 

 tion of the glauconite to tliese forms is very marked. 



By far the most abundant forms present in the sand are mem- 

 bers of the Globigerinidje, the conmionest species being Glohiijerina 

 hul/oidfs. There is a goofl representation of the genera and 

 species of the family and corresponds closely with that in sand 

 dredged oft' Wollongong at a depth of 100 fathoms. 



The genus Layeua is very abundant and is represented by a 

 fair number of species. Since such a great number of species of 

 LdilPiia have been described and the naming uf new species is 

 objectionable unless some marked character of specific imj^urtance 

 is detected, it has been deemed advisable not to name a few new 

 forms whose characters fit in as variations or connecting links 

 between named species. 



Lagena sulcata is the most abundant form and shows great 

 variation. Many forms — apiculate and winged — with slight and 

 varied differences represent varieties of this species. 



Quite a large number of L. (jJoho'ia show an entosolenian tube. 



The genus Xodosaria is remarkably scarce in the material. 



Interesting non-spinous varieties of (JristMaria calcar are pre- 

 sent. Pi>ljjnu>rj)hnia alv^iAiniformis, described by Jensen from 



