BY C. IIEDLKY. 387 



Paktula macleayi, Brazier. 



A shell contiiining the animal, collected by Mr. English, was 

 sent from Rigo. I failed to make a satisfactory dissection of the 

 genitalia. The jaw (Pi. xxvi, fig. 23) is thin, flexible and pale 

 yellow, arched, crossed perpendicularly by very numerous and 

 slender riblets which slightly denticulate the inferior margin. The 

 slightly imperfect radula (PI. xxvi., fig. 22) that I examined con- 

 tained 160 rows of 40 : 6 : 1 : 6 : 40. The rachidian is advanced half 

 a length before the immediate laterals ; it is small, with a single 

 ovate cusp whose tip projects over the basal plate, the latter 

 being a little expanded posteriorly. The laterals are set aslant 

 to the rachidian, and are armed with a large ovate proximal 

 cusp and a small thorn-shaped distal one, the basal plate being 

 bent posteriorly towards the rachidian. In tlie marginals the 

 small cusp divides first into two then into three, receding they 

 become larger and more sloped. 



Seeing that a plaited jaw may be welded into a ribbed one, 

 I am not disposed to consider the eccentric jaw of macleayi 

 as outweighing in taxonomic value those characters of the shell 

 and radula which point to Partula. Other figures of Fartula 

 dentition are : Malak. Blatt., 1867, xiv., PL i., fig. 1 ; Annals 

 New York Acad., iii., PI. xi., fig. l, PI. xv., fig. o; Reis. Philip., 

 iii., PL xvii., fig, 18. 



Papuina zeno, Brazier. 



Specimens of this species accompanied the last. Its genital 

 system (PL xxvi., fig. 27) was seen to be like that of /'. 

 hruvieriensis, remarkable for its simplicity. The epiphallus, on 

 which is the retractor muscle, passes insensibly into the wide vas 

 deferens. My illustration shows the penis-papilla in section. 



The jaw (PL XXV., fig. 15) is thin, wide, and crossed by weak 

 ribs. 



For formula the radula has 153 rows of 42 : 10 : 1 : 10 : 42. 

 (PL XXV., fig. 14). The rachidian cusp is narrower than that of 

 the laterals ; both are square-headed and surpass the basal 



