REPORT ON THE TUXICATA. 



85 



The chief differences between the sub-families may be shown in a tabular form thus 



Cyntjiiih.k. 



Branchial sac having more than four folds on 



each side — Tentacles compound. 



Branchial sac having four of less than four folds on 

 each side — Tentacles simple. 



Body sessile or almost so. 

 I 



CYNTHIN.E. 



Body borne on a long peduncle. 

 I 



BoLTENIN^E. 



StYELIXjE. 



Sub-Family Boltenin^e. 



Body attached and pedunculated ; branchial and atrial apertures having either 



four or less than four lobes. 

 Test coriaceous, membranous, or cartilaginous, not covered with sand. 

 Bra nch kd Sue with more than four folds on each side. 

 Tentacles compound. 



This sub-family was formed 1 for the reception of Boltcnia, Savigny, Cystingia, 1 

 Macleay, and the new genera Culeolus and Fungulus, discovered by the Challenger 

 Expedition. It is more nearly allied to the Cynthinas than to the Styelinse, as it agrees 

 with the former group in having compound tentacles, and more than four folds on each 

 side of the branchial sac. The Bolteninse are distinguished from the Cynthinse by the 

 long peduncle upon which the body is borne. 



The genera in the sub-family may be arranged in a tabular form as follows : — 



BoLTEXIX.E. 



Fine longitudinal vessels and stigmata 

 present in the branchial sac. 



I 

 Boltenia. 



No fine longitudinal vessels in the 

 branchial sac. 



Branchial aperture fourdobed. 



I 

 Cy&Hngia. 



Branchial aperture more or 

 less triaugular. 



Stalk relatively 

 short and thick. 



I 

 / gulw. 



Stalk relatively 

 long and thin. 



I 

 Cuh'ohis. 



1 Preliminary Report, part hi., Proc. Roy. Soc. Edin., 1880-81, p. 53. 



- This form, described by Macleay in 1823, was brought from the arctic Beaa, and, so far as lam aware, it has ii"t been 

 found since. From Macleay's description it evidently belongs to the Moltriiimr, and is closely allied to Boltenia. The 

 branchial aperture is described as four-lobed, and the atrial as irregular. The branchial sac is folded, and is stated to 

 have no branchial network ; possibly it is like that of Culeolus (see below, p. 90). 



