80 THE VOYAGE OF H.M.S. CHALLENGER. 



Family P A p h 1 1 d ^. 

 ErvUia, Turton. 



Evvllia castanea (Montagu). 



Donax castanea, Montagu, Test. Brit., part ii. p. 573 ; Supiil., pi. xvii. fig. 2. 

 ErvUia castanea, Forbes and Hanley, Brit. Moll., vol. i. p. 341, pi. xxxi. figs. .5, 6. 

 Krrilia castanea, H. & A. Adams, Gi'neia Moll., vol. iii. pi. cvi. figs. 7, 7a. 



Amphidesma castanen, Je(fre3's, Brit. Conch., vol. ii. p. 413; vol. v. pi. xliiL fig. 1 ; Proc. Zool. 

 Soc. Lond., 1881, p. 922. 



Hahitaf. — Stations 75 and 78, off the Azore.s, in 450 and 1000 fathoms ; also off 

 Tenerife, in 70 fathoms. 



For the distribution of this species, vide Jeffrey's paper in the Proc. Zool. Soc. Lond. 



The West Indian Enjcina nttens, Montagu, is very like this species, and is mainly 

 distinguished by its rather coarser concentric sculpture and different colouring. The 

 composition of the hinge is identical. 



Ervilia hlsculpta, Gould. 



Ei-vilia hisadjila, Gould, Proc. Best. Soc. Nat. Hist, 18G1, vol. viii. p. 28 ; Otia, p. 1G6. 

 Erivlia australis, Angas, Proc. Zool. Soc. Lond., 1877, p. 17.5, pi. xxvi. fig. 21. 

 Ervilia incolor, DosLayes, MRS. iu Brit. JIus. 



Habitat. — Port Jackson, Sydney, in 2 to 10 fathoms (Challenger and Angas) ; 

 off the Pteefs at Honolulu, Sand^^^ch Islands (Challenger) ; Kagosima, Japan (Gould) ; 

 Island of Samar, Philippines (Mus. Brit.). 



Australian specimens of this species appear to be rather more finely concentrically 

 striated than those from Japan, judging from a single examjsle in Cuming's collection 

 from that locality. Although Gould refers only to radiating sculpture on one side, I find 

 it occurring on both, in all specimens. 



Ervilia sitbcancellata, n. sp. (PL VI. figs. 2-2?^). 



Testa subtrigona, acuminate ovata, snbtennis, parva, alba vel roseo tincta, 2"/auk) 

 insequilateralis, concentrice tenuiter lirata, liris ad latera atteuuatis, striis tenuibus 

 radiantibus postice decussatis. Margo dorsi posticus elongatus, fere rectilinearis leviter 

 declivis, anticus brevior, vix excurvatus et obliquus. Umbones parvi, parum prominentes, 

 sul)acuti, apicibus postice versis, paulo ante medium coUocati. Cardo ut in Ervilia 

 castanea. 



This species is considerably longer than high, triangularly oval, not very thin, white 

 or stained with rose, chiefly on the posterior portion. It is a little inequilateral, 



