4 E. C. Josh iia : 



I think that there can be no doubt that this species is very close- 

 to. if not identical with Ludwig's Cucumarla parvo. It is to be 

 noted that Ludwig (17) has pointed out that so far as 2)arva is 

 concerned, the process of reproduction may occur before complete 

 development of the spicules has been attained. 



CccuMARiA MUTANs, sp. n. (Plate I., Figs. 1 (a), (b), (c), (d).) 



Localities. — Port Phillip Bay. Westernport Bay. and Victorian 

 Coast line. 



Length 60 mm., greatest width 20 mm., tapering gradually to 

 both posterior and anterior ends. Tentacles, ten of almost equal 

 length, pedicels confined to the radii. In the three ventral radii 

 they occur in five closely disposed rows; in the two dorsal radii 

 in three rows. The calcareous deposits consist of numerous tables. 

 80 fx in diameter, with three large central holes, and a spire hav- 

 ing three rods, joined by a transverse beam, and terminating in 

 six or seven spinous projections. The calcareous ring has ten 

 pieces of about equal length, without posterior prolongations. The 

 internal anatomy shows no peculiarities; colour, degraded white; 

 tentacles, black. 



This is perhaps one of our commonest Holothurians — the young 

 forms being met Avith between tide marks in all the localities in 

 which I have collected. It is to be noted, however, that these 

 young forms differ very materially from the mature animal; their 

 colour is a deep blue black, and the tables, which are crowded- 

 in the older animal, are few and far between in the young, and 

 are usually devoid of the spire. 



Though a very typical Cucumarian. its spiculation would appear 

 to specifically distinguish it from any previously described species. 



GENUS PHYLLOPHORUS. 



Phyllophorus dearmatus Dendy. 



I collected a single specimen of this animal at Flinders, and 

 there is another from Westernport Bay. in the collection of the 

 National Museum. Melbourne; Mr. Roebuck obtained two at Tor- 

 quay. Tlio al)sence of spicules in the perisome would appear to be 

 not unconunon in uiembers of this genus. A species about to be 

 described exhibits the same pec-uliarity, and another species at pre- 

 sent undescribed, found in South Australia, is quite devoid of 

 calcareous bodies in the perisome, with the exception of the cribri- 



