518 DR G. S. BRADY ON 



Cijtherella (X) tumida, n. sp. (PL IV. figs. 21-23). 



Shell, seen from the side, somewhat oblique, subelliptical, rather lower in front than 

 behind, height equal to more than half the length ; left valve much larger than the right, 

 and overlapping greatly on the dorsal margin. Extremities rounded, the anterior some- 

 what the wider ; dorsal and ventral margins only slightly convex, parallel. Seen from 

 above, broadly ovate, widest behind the middle, width equal to about two-thirds of the 

 length, obtusely pointed in front, broadly rounded behind, lateral margins boldly convex. 

 Shell-surface quite smooth. Length "48 mm. 



Habitat. — One specimen only of this species was found in a gathering from reef-pools 

 at Lufi-Lufi, Samoa. This specimen was destroyed in an unsuccessful attempt to find 

 the contained animal. The generic reference must be considered only provisional, one 

 important difference between this and the typical Cytherella being the larger size of the 

 left valve ; whereas the valve of the right side is the larger in Cytherella. 



Cytherella cuneolus ? G. S. Brady. 



Cijtherella cuneolus ? Brady, Les Fonds de la Mer, vol. i. p. 192, pi. xix. figs. 18, 19. 



A shell, which probably belongs to this species, was found amongst shore-sand from 

 Porcheron's Beach, Noumea. The specimen is, however, malformed, and the two valves 

 differ considerably one from the other in shape and sculpture, so that I cannot assign it 

 with certainty to this or any species. 



The following is a descriptive list of the gatherings in which the specimens have been 

 found. The particulars in each case have been inserted from notes supplied to me by 

 my brother, Dr H. B. Brady, F.R.S., to whom I am indebted for the material. In 

 assigning localities to the different species, I have not thought it necessary in all cases to 

 specify these localities with absolute accuracy, as, for instance, in the case of the several 

 gatherings in or near the Port of Noumea, where the depth and physical conditions do not 

 present any great variety. The multiplication of references to such localities could 

 scarcely serve any useful end. 



New Caledonia. 



1. Noumea. — Porcheron's Beach, near the salt-flats ; brackish mud from pools about 

 the mangrove trees, near or above high- water mark. 



2. Noumea. — Shore-sand near low water, head of bay, close to the road leading to 

 Artillery Point ; reddish-brown muddy sand with stones, mollusc shells, fragments of 

 Echini, Orbitolites, and Alveolinse. 



3. Port of Noumea. — 3-4 fathoms ; muddy sand, full of small Orbitolites and 

 Alveolinse. 



4. Port of Noumea. — South side, off Artillery Barracks, 5-6 fathoms ; soft muddy 

 sand, with mollusc-shells, whole and broken, and some coral. 



5. Near Noumea. — Between He Pore-Epic and shore ; weedy bottom, depth 2 fathoms. 



