144 
ACTINOPIERYGII. 
pelvic fins much smaller, these arising much nearer to the f° r 1 
than to the anal and opposed to the origin of the dorsal ; dors' 
with about 10 rays, occupying the middle fifth of the back .’, 8 ” he 
fin not much extended, with 8 rays, arising considerably behw 
posterior end of the dorsal. Dorsal scutes broader than ■<>£> 
emarginate behind and thus heart-shaped ; ventral ridge-scales °o 
paratively small in advance of the pelvic fins, but rapid!} incre ^ 
in size backwards beyond it, the three hindermost scales ndat ^ 
very large, but all smooth with only one sharp point an 
serrations. 
Form. <Sf Loc. Upper Cretaceous : Bahia, Brazil. ^ 
P.7109. Fine specimen described and figured by the 
writer, loc. cit. p. 2, pi. i. fig. 1 ; from the beach 11 _ g aD 
Itacaranha and Plataforma, near kilom. 7, Bahia an 
Francisco Bail way. 1893* 
Presented by Joseph Mctwson, Esq., 
P.8256'58. Three specimens ; near Itacaranha. ^ ],s96. 
Presented by Joseph Mctwson, Esq-i 
P- 413. More fragmentary large specimen : near Itacaranha. ^ 
Presented by Joseph Maivson , Esq-, 
P- 5530. Remains of small head and abdominal region, 
anterior ventral ridge-scales, noticed by the present V ^ 
in Ann. Mag. Nat. Hist. [6] vol. ii. (1888), P- 134 ’ l8 sl- 
Itacaranha. Presented by Joseph Mctwson, Esq., 
Diplomystus humilis (Leidy). ,g 
1856. Clupea humilis, J. Leidy, Proe. Acad. Nat. Sci. Philad- F ' 
1870. Clupea pusilla, E. D. Cope, l*roc. Amer. Phil- Soc ’ 
__ p. 082 ; and Aun, Rep. U.S. Geol. Surv. Territ. p. 429. ^ err it. 
1873. Clupea humilis, J. Leidy, Contrib. Ext. Vert. Fauna • j 
(Rep. U.S. Geol. Surv. Territ. vol. i. pt. i.), p. 19o, P b xVU y or rit. 
1877. Diplomystus humilis, E. I). Cope, Bull. U.S. Geol. Surv. 
vol. iii. p. 811. , yyrest, 
1884. Diplomystus humilis, E. I). Cope, Vert. Tertiary I or® fig. 3, 
Book I. (Rep. U.S. Geol. Surv. Territ. vol. iii.), P- , P • 
pl. ix. fig. 8, pi. x. fig. 4. 
type. Nearly complete fish ; National Museum, t\ashin 0 t^^ 
An elongated species attaining a length of about 0 - 18, \ oia insl 
legion comparatively slender and much shorter than the a ^an 
re n ion. . Length of head with opercular apparatus slight } ]jear ly 
t ie maximum depth of the abdominal region, which c, P a aU dal 
one third of the total length of the fish to the base of th 
