REPORT ON THE TUNICATA. 



127 



Fungulus, n. gen. 

 Body globular, borne on a short thick peduncle attached to the anterior end. 



Branchial aperture triangular, atrial aperture bilabiate. 

 Test cartilaginous, but very thin, not modified on the peduncle. 

 Hrum-liio! Sac with several slight folds on each side ; meshes square, no stigmata. 

 Dorsal Lkiuuiii a plain membrane. 

 Tentacles compound. 

 Genitalia a single gland on each side. 

 This genus is formed for a single Ascidian, which was at first considered as a 

 Culeolus, but which seems to be sufficiently distinct to require a separate position. It 

 is abnormal amongst Bolteninse, as regards the condition of the peduncle, and on the 

 strength of this character alone might be placed in the sub-family Cynthinse, but it is 

 probably more correct to place it here beside Cuholus, with which its internal structure 

 shows it to have close affinities. 



Fungulus cinereus, n. sp. (PI. XIII. figs. 7-10). 



External Appearance. — This species is club-shaped, and consists of a rounded knob- 

 like body borne on a short thick peduncle. The body is globular, and not compressed 

 laterally. The anterior end is rather wide, is directed downwards, and becomes continuous 

 with the peduncle by its ventral edge. The posterior end is wide and rounded, especially 

 at its ventral extremity. The dorsal edge is long and straight, but the ventral is strongly 

 convex. The peduncle is continuous with the ventral edge of the anterior end ; it is 

 longer than the body, and about half as wide, and is attached by its lower extremity. 



The apertures are distant, they are conspicuous, but scarcely projecting. The branchial 

 is at the dorsal edge of the anterior end, not far from the point of attachment of the 

 peduncle; it is slightly prominent, is rather large and open, and is surrounded by a circular 

 raised lip within which are three flat lobes leaving the aperture triangular ; it is directed 

 anteriorly and slightly dorsally. The atrial is close to the posterior end of the dorsal edge ; 

 it is sessile, and not so conspicuous as the branchial. The aperture is in the form of a 

 gaping transverse slit with anterior and posterior lips ; it is directed dorsally and slight! y 

 posteriorly. 



The surface is even, but minutely roughened on the peduncle. The body is nearly 

 smooth, it is slightly wrinkled in parts, and a little incrusted with sand grains on the 

 left side. 



The colour is dark grey with a slate-blue tinge in parts. 



Length of the body, . . . . . 1-3 cm. 



Breadth of the body, 

 Thickness of the body, 

 Length oi the peduncle, 

 Breadth of tin- peduncle, 



1-2 

 11 



la 

 •5 



/ /'■ st is thin, but moderately tough, and is between cartilaginous and membranous 



