301 



have two lengths of end rays. Oxyhexasters 140 u in diameter have 

 short main rays ending in 2, 3, or 4 end rays; hemioxyhexasters and 

 heteroxyhexactins sen monoxyhexasters rare. 



Aulorossella iKinhoeff'eni arniata nov. subsp. 



There are several small specimens, the largest being in the form of 

 an oval sack 3,1 cm long and 1,8 cm broad. The surface is beset with 

 small conical tubercles whence arise diactine pleuralia. The hypodermal 

 pentactins still persist, but the tangential rays are reduced to mere 

 prongs bent down at an acute angle with the shaft. 



In one example several transitional forms of hypodermal pentactins 

 are present, i. e. one or two rays may be rather long and nearly at right 

 angles, and the other rays short and bent at an angle. The rough spi- 

 nous auto-dermalia and calycocomes are the same or nearly the same 

 as those in the typical form. 



Localities. All specimens come from 380 — 385 metres from near 

 "Gauss" Station. 



Diagnosis table of species of Atdorossella. 



A. With shallow gastral cavity. 



1) A. longstaffl Kirkp. 



B. With deej) gastral cavity. 



a. With abundant oxyhexasters with long main rays and 4 thorn- 

 like end rays, among the auto-gastralia. A. pilosa Kirkp. 



b. Without oxyhexasters among the auto-gastralia. 

 1] With mostly pentactin autogastralia A. levis Kirkp. 



2) With only hexactin autogastralia A. ranhoe/feni n. sp. 



Anoxijcalyx ijimai Kirkp. 



The "'Gauss" collection includes a large number of specimens of 

 this species. Kirkpatrick (Discovery Hexactinellida p. 23.) put this 

 form among the Lanuginellinae, on account of its having strobilocomes ; 

 but the genuine strobilocomes are very minute hexasters with verticils of 

 rays without disks, whereas the so-called strobilocomes of A. ijimai are 

 macro discohexasters from 165 — 255 n in diameter. It is now proposed 

 to call these spicules with strobiloid capitulum and several verticils of 

 disk-tipped end r^ys — macrostrobilocomes. 



Further, the so-called graphiocomes of A. ijimai require a new 

 designation; and the term "pappocome" is proposed for these spicules 

 with their very divergent tufts of slender rays. 



The large microdiscohexasters are 120 u in diameter, and not 60 a 

 as stated in the ''Discovery". Report, the error being due to an omission 

 to double the measurement of the half diameter. Lastly a few rare oxy- 



