REPORT ON THE POLYZOA. 2a 



rare, so that in the first one examined I did not at once see anv, but, recognisiuo- it as 

 my Porella emendata, it was again examined with this object, and two or three only 

 were found on a large colony, but thus the determination was confirmed. 



It seems also related to Escliara polymorpha, Reuss, loc. cit., p. 182, Taf. viii. 

 fig. 8. 



Habitat. — Victoria (MacGillivray) ; Port Phillip (Busk); and Station 162, 38 

 fathoms. Fossil — Curdies Creek (Australia) ; SoUigen (Oligoceue). 



Smittia delicatula, Busk (PI. III. fig. 26). 



Miicroru'IIa delicafuJa, Busk, Zool. Cliall. Exp., part xxx. p. 156, pi. xviii. fig. 2. 



This is a very typical Smittia, which might be called Smittia tnspinosa, Johnston, var. 

 delicatula. Mr. Busk sjjeaks of the mucro being within the border of the orifice, but it 

 is the denticle (lyrula) to which he refers ; and in Smittia this lyrula seems always to be 

 in front of the operculum, so that this is no exception, as Mr. Busk seems to suppose. 

 This must have led him to place it under Mucronella. The ovicell is large, wide, raised, 

 with a large area marked off", in \\'hich there are large perforations, the rest being 

 granular. 



Smittia smittiana, Busk. 



Smittia smittiana, Busk, Zool. Cliall. Exp., part xxx. p. 151, pi. xvii. fig. 3. 

 Smittia stigmatophora. Busk, up. cit., p. 154, pi. xxii. fig. 6. 



In the British Museum specimen of Smittia smittiana, named by Mr. Busk, I should 

 call the ovicell decidedly depressed not " prominent ;" in the specimen named Smittia 

 stigmatophora the ovicells are also depressed, and usually have a small area in front 

 with perforations ; and it seems as if the marking with the few large pores, which 

 Mr. Busk figured and called a stigma, only occurs in the young and undeveloped 

 ovicells. 



One of the specimens in Edinburgh, named by Mr. Busk Smittia smittiana, is 

 adnate on Vincidaria, and a specimen of typical Smittia smittiana which I found on 

 Ascidia meridionalis, from Station 320, 600 fathoms, is also entirely adnate, showing 

 that the "unattached" character is not constant in the same locality. 



I wrote to Mr. Kirkpatrick to tell him that from my notes made in the British 

 Museum I was convinced that Smittia smittiana and Smittia stigmatophora were 

 synonyms, and he entirely confirmed my view, and said that the Smittia smittiana is 

 of a larger build than Smittia stigmatophora, and he found stigma-like ovicells in 

 Smittia smittiana, but this I only look upon as a stage of growth. 



(zool. chall. EXP. — PART Lxxix. — 1888.) Kkkk 4 



