398 



DR. W\ T. CALM AN ON 



Teredo {Xylotrya) saulii Suter, Man. N. Z. Moll. 1918, p. 1021, 

 pi. Iv. fig. 8, a, h ; Gatliff and Gabriel, Proc. Hoy. Soc. Victoria 

 (n. s.) xxviii. 1916, p. 121, pl. xiii. fig, 11. 



Nec Nausitora saulii Wright, Trans. Linn. Soc. xxv. 1866, 

 p. 567, pl. Ixv. figs. 9-15. 



Localities. — Brisbane, Queensland. Specimens forwarded by- 

 Mr. E. A. Cullen, Engineer for Harbours and Rivers. From 

 Jetties &LC. in river 5 or 6 miles from Moreton Bay, in Ironbaik 

 (^?J acalyjytus j^aniculata) and Hardwood {E. macidata). 



Auckland, IS^ew Zealand. Specimens forwarded by Mr. Ham er, 

 Engineer to the Auckland Harbour Board. From Kauri and 

 Black Butt timber. 



Remaj'ks. — Wright states that the type-specimens of his 

 Xausitora saidii, which were presented to the British Museum by 

 Miss Saul, came from Port Phillip, Australia, and it is perhaps 

 this statement rather than any very exact correspondence with 

 his description or figures that has led Australasian naturalists to 

 apply the name to the species common in Australian and New 

 Zealand waters. It appears, however, that Wright's statement 

 was in error. The specimens in the Museum collection labelled 

 as '"Types" and presented by Miss Saul are stated, on the label 

 and in the Register of MoUusca, to be from Callao, Peru f. It is 

 true that none of the valves or pallets can be definitely recognised 

 as the original of any one of Wright's figures, but there are 

 two characters in which these specimens agree closely with his 

 account ; the auricle shows, on the inner surface, a series of 

 conspicuous curved ridges indicated in Wright's pl. Ixv. fig. 10, 

 and several of tlie pallets have the outer surface worn away so 

 as to expose the "central core-like body" mentioned in the 

 description (p. 568) and shown in pl. Ixv. fig. 15. 



These type-specimens, however, appear to me to be specifically 

 distinct from those I have examined from Brisbane and Auckland, 

 which undoubtedly belong to the species called saidii by 

 Hedley and other Australasian naturalists. The chief differences 

 may be briefly stated as follows : — 



X. saulii (Wright) (text-figs. 4 & 5). Dorsal outline of valve 

 sloping steeply Avithout break into the upper margin of the 

 auricle, which exceeds half the total depth of the valve and 

 descends on the hind mai-gin for more than half the distance 

 from the anterior notch to the ventral edge. The auricle is 

 marked with rather widely spaced lines of growth which, espe- 

 cially on the inner surface, appear as strong curved ridges. The 

 anterior border of the auricle on the inside overlaps as a narrow 

 band and is closely appressed to the inner surface. The pallets 

 (text- fig. 5) have the segments strongly calcified and closely set, 

 the average interval being estimated at not more than one-fifth 



* Suter (Man. N.Z. Moll. 1913, p. 1022) mentions Callao among the localities 

 iov. the species, hut states that the type is from Port Phillip. I do not know the 

 source of his information. 



