34 . 
Palfcontologist is anything but satisfactory. It appears to us, after carefully 
reading Professor Hall’s remarks and such of the literature as we have access 
to, that the identity of the two names is hy no means conclusively proved even 
now. !Mr. G. IV. Tryon, Junr., also referred^ EntoUum to Eernopecten, hut 
without comment. It is not within our power to contribute any observations 
of moment to tlie subject, hut in the meantime we ado])t EntoUum for a New 
South Wales shell, after the type of Pecten aviculatiis, Swallow, and 
P. Sowerhyi, INFcCoy. We are supported in this hy the fact of the 
late Prof. E. A. Verrill, in his “ Study of the Eamily Pectinidm,” &c., 
recognising’^ both Pernopecten and EntoVmm as valid — typifying the former 
hy Pecleu limijbrniis, White and Winchell,^ and tlie latter hy P. cornutum, 
(pienstedt. 
Er. Wheelton Hind has recently referred EntoUum to another genus 
of Meek’s — Sijncyctonema, a Cretaceous Pectinoid shell — with the following 
remarkG — “Unfortunately no one recognised that the genus '[Entoliuni] 
occurred also in the Cretaceous beds, and had been described hy Meek in 1861 
as Syncyclonema, and, therefore, this generic term has the priority to 
EntoUumP 
IVe fail to appreciate this passage, as from our reading of the original 
descriptions of Meek’s two American type species of EntoUum, and that of 
Syncycloneniu, we are unable to see any valid reasons for uniting the two 
names in one — unless Hr. Hind is in possession of more recent information. 
Prof. Verrill’s remarks appear to strengthen our view. 
Hr. Hind is not the first to sim^est a union of EntoUum and 
O O 
Syncycloncma, for we find Mr. Henry AUoods in the previous year writing as 
follows^: — ‘^Syncyclonema should probably he united with EntoUum, as has 
been suggested hy Phili])pi.” The internal structure shown in one of his 
figures of Pecten orbicularis. Shy.,® of the Lower and Upper Cretaceous, 
certainly coincides in a great measure with that of EntoUum; but can it 
he also proved that the internal structure of Hall and Meek’s type of 
Syncyclo7iema, viz., Pecten rigida, was the same r If so, then EntoUum and 
' Tryon, Junr. — Sir. an J Syst. Coucli., 18Si, HI, p. 291. 
^ Verrill. — Trans. Connecticut Acad. Arts and Sci., 1899, X, pt. 1, pp. G2 and G3. 
^ Non Pecten llmceformit, Morris. 
‘ Ilind. — Mon. Brit. Carb. Lainellibr., 1903, II, Pt. 2, p. 117. 
^ Woods. — Mon. Cret. Lamellibr. England, 1902, Pt. 4, p. 143. 
^ AVoods. — Loc. clt,, t. 27, f. 14. 
