REPORT ON THE HEXACTINELLIDA. 



41:5 



XX. Cup- or fiinncl-shaped. The principalia are long diacts 



(Asccmema, Sav. Kent.), 

 Tubular. The principalia include not only long diacts, 

 but also o.xyhcxacts (Aulascu.s, F. E. S.), .. 



XXI. Asconema, Sav. Kent, with the single species, 



XXII. Aulascus, F. E. S., with the single species, 



XXIII. SYMPAGELLINiE. 



On each of the terminal branches of a slightly ramified 

 stock, there is a terminal oval goblet. The dermal 

 pinuli are pentacts. The parenchyma contains 

 small " roller stars " (Sympagella, O. Schmidt), 



The oval body, which is narrow superiorly, contains 

 dermal hexact pinuli {PoJijrhahiluit, F. E. S.), 



The clay-pipe-like body contains in its parenchyma 

 discohexasters, with long principal rays and short 

 terminals {Balanites, F. E. S.), . 



XXIV. Sijmpagella, O. Schmidt, with the single species, 



XXV. Polyrliahdus, F. E. S., with the single species, . 

 XXVI. Balanites, F. E. S., with the single species, 



XXVII. Caulophacin.«, F. E. S. 



The body, which is flattened from above downwards, is 

 either biconvex, or convex above and concave below 

 by the folding over of the marginal portion. With- 

 out sickle-rosettes in the stalk ( Cauloph acus, F. E. iS . ), 



"With sickle-rosettes in the long, hollow, rough stalk 

 (Trarhyranlus, F. E. S.), .... 

 XXVIII. Caulopha<:us, F. E. S. 



The margin of the body is folded over downwards. On 

 the convex gastral surface there are long pentact pinuli 



The disc of the body is biconvex or with a downward 

 folded border. The gastral pinuli are all hexacts, . 



XXIX. Traehycatdm, F. E. S., with the single species, 



XXX. RoSSELLIDiE. 



Unstalked (or quite shortly stalked), cup- or sack-sliaped 

 forms, .... 



Seated on a distinct long stalk, . 

 XXXI. Principalia do not tend to become soldered together, nor 



do they even in oM specimens form a connected 

 framework, ..... 



The principalia, which show a tendency to be united and 

 soldered together by synapticula, form in the older 

 parts of the body a connected framework, . 



PAGE AND PLATE 

 XXI. 

 XXII. 



Asconema setubalense, . 116 



XXI. 



A ulascus jolinntoni, . 118 



XXIV. 

 XXV. 



XXVI. 



Sympagella nux, . 



Polyrhahdus ovifornii.^. 

 Balanites pipetta. 



120 



XXII. 



121 



XXIII. 



122 



XXIIl. 



XXVIII. 

 XXIX. 



Caulophacus latus, . 124 



XXIV. 



Caulophacus eleganx, . 126 



XXV., XXVI. 



Trachycaulus gurlitfii, . 1 28 



XXVI. 



XXXI. 

 XLIV 



XXXII. 



XLIII. 



