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Published by means of the yankee Geophysical Union as a part of the Antarctic study Series.

The Antarctic learn sequence, an outgrowth of analysis performed within the Antarctic in the course of the overseas Geophysical yr, was once began early in 1963 with a furnish from the nationwide technology starting place to AGU. it's a booklet sequence designed to serve scientists and graduate scholars actively engaged in Antarctic or heavily similar examine and others versed within the organic or actual sciences. It presents a continual, authoritative medium for the presentation of in depth and designated medical study effects from Antarctica, rather the result of the U.S. Antarctic learn software. this actual quantity comprises four papers.

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Eltanin s p e c i m e n s e x h i b i t e d a vertical distribution m o r e c o n s i s t e n t w i t h H a e c k e r ' s results t h a n with S c h r o d e r ' s . Aulographis pandora is v e r y a b u n d a n t a n d w i d e l y distributed in the w o r l d o c e a n . W i t h r e s p e c t to g e o g r a p h i c distribution a n d a b u n d a n c e of in­ dividuals, A. pandora is s e c o n d only to Aulacantha scolymantha. Discussion. Individuals of A. pandora or frag­ m e n t s of individuals with m o r e t h a n s e v e r a l radial tubes p r e s e n t m a y b e distinguished readily f r o m A.

A t t e m p t s w e r e m a d e to t o w the trawls at speeds of 3 - 4 . 5 k n o t s ( 5 . 5 - 8 . 3 k m / h ) . For o r g a n i s m s of p h a e o d a r i a n size r a n g e it is p r o b a b l e that the effectual fishing size of the n e t is s o m e w h a t over the 1-m-diameter size of the cod e n d of the net. It is v e r y difficult to estimate t h e a m o u n t s of w a t e r that m a y h a v e b e e n filtered by the trawls. T h e pitometer of the ship was in­ o p e r a b l e during m o s t of these cruises.

T h e s k e l e t o n m a y be l a c k i n g . W h e n it is present, the skeleton is of e n c r u s t e d siliceous foreign particles or is c o m p o s e d of silica c a r b o n a t e in the f o r m o f hollow or solid tubules or rods or a lattice. Superfamily P H A E O D I N I C A E H a e c k e l , 1879 Lattice shells are absent. S k e l e t o n s either are l a c k i n g or are of isolated c y t o p l a s m i c spicules. Family A U L A C A N T H I D A E H a e c k e l , 1862 T h e s k e l e t o n is f o r m e d of n u m e r o u s h o l l o w radial tubes.

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