282 



Dichotriaene. Small. Angle (p about 120°. Witli trausitions to 

 plagiotriaenes. Deuterocladi as a rule shorter than procladi. 



Oxyaster. Actines slender. 



Amphiaster. Very miaute. 



Found between Capri and Naples (150 to 200 meter); Secca 

 di Benda Palummo (40 meter). 



Aucorina cerebrum O. S. 



Syn. 1862 Stelletta wageneri O. S. 



1862 Stelletta immunda O. S. 



1862 Ancorina verruca O. S. 



1867 Stelletta wagleri Gray. 



1867 Aucorina crebra Gray. 



1867 Ancorina virescens Gray. 



1878 Ancorina verrucosa Claus. 



1888 Ancorina wageneri Soll. 



1889 Ancorina radix Marenz. 



Cf. Schmidt, Spong. Adriat. Meeres (1862) pp. 46, 51 und 85 (!) ; 

 PI. IV, lig. 3; PI. III, fig. 28. 

 Mareuzeller in Anu. K. K." Naturk. Hofmus. Wien. (1889) 

 p. 13—15; PI. m, fig. 5 und 6. 



Von Marenzeller has sufiBciently proved that Stelletta wageneri 

 O. S. = Ancoriua cerebrum O. S. = Ancorina verruca O. S. I 

 investigated type-specimens of all these sponges and I can only 

 agree with Marenzeller. Only it seems to me probable that A . ra- 

 dix Marenz. ought also to be included, especially as I found 

 in the Naples specimen both oxyasters with long slender actines 

 and such with short, conical ones; there are moreover very few 

 dichotriaeues hut on the other hand sanidasters which are smal- 

 ler than in the type-specimen of A. cerebrum. I will discuss this 

 in extenso in the » Fauna and Flora" where I have illustrated 

 these points with figures after the original specimens. 



The shape of my specimens is irregular. The surface is even, 

 but nevertheless rough to the touch. A shalow depression is visible 

 in which lie the proctions. The colour is greyish blue. 



