KADIOLAUIA Vh' THK TASMAN SKA — HASWKLL. 275 



there are tliiee members of it wliicli present certain features of 

 speoial interest. These T will distinguish as C. annafuvi, n. sp., 

 C. nlpha and C. he fa respectively. 



CoLLOZOUM ARMATUM, S/J. nov. 



(Plate liii., fig. 1). 

 The entire absence of skeletal parts is gi\en b}- Haeckel (Rep. 

 p 2-1:) as one of the diagnostic characters of the genus ColJozuum. 

 Brandt"', however, states that in C. hprtwvji there may be present 

 completely isolated needle-like spicules. Spicules identical with 

 those of various Sphafrozoum-Si'pecieii are present in several of my 

 specimens of CcUozoiivi, but, frum their mode of occurrence, these 

 are undoubtedly to be looked upon as of the nature of foreign 

 bodies. In the form now to be described, however, there is a 

 true skeleton of an elementary character, although in other 

 respects there is no departure tVom the character of tlie genus 

 Col/uzoion. 



The form of the colony is unknown, tlie species being repre- 

 sented only by two fragments, wliich, however, show quite distinct 

 phases. The zooids in both are splierical, 0-1 mm. in diameter, 

 with a distinct capsular membrane. One of them is in a fairly 

 early stage of anisosporous reproduction, each capsule enclosing a 

 large immber of nuclei arranged in the characteristic way in 

 rounded groups. The other is in the isosporous phase. In the 

 latter tlie oil globule is present ; in the former it is not distinguish- 

 able. In neither ai-e pseudojjodia or pseudopodial matrix recog- 

 nisaljle. The skeletal elements are extremely slender, simple 

 fibre-like spicules in the inter-capsular jelly ; they are about 

 0'2mm. in length or a little longer, with a diameter of not more 

 than 0-001 mm. The small size of the fragments precluded any 

 attempts to determine tlie composition of the spicules. 



CoLLOZoU.M (alpha). 



(Plate liii., fig. 2). 



There is only one specimen of this form, a complete colony of 

 spherical shape, only about 2 mm. in diameter. The zooids are 

 apparently in the vegatative phase. Tliev are spherical in form ; 

 only in one case is there a constriction indicating an early stage 

 in vegetative multiplication. In each capsule there are 20-30 



Brandt, K — Die Koloneibildende Radiolarieii : Spliaerozoen, (Faiiiia ii. 

 Flora Golft'^; v. Neajiel, xiii., 1SS8, ]>. 228 j. ' 



