A CTINO PTER Y G II. 
342 
The small fish named Anguilla brevicula by Agassiz 
Jahrb. 1835, p. 307, and op. ext. vol. v. pt. i. p. 15, *’• P' 
pi. xliii. fig. 1), from Monte Bolca, may also belong to Eomxjrus. 
is not represented in the Collection. 
Conus EHYNCHORHINUS, novum. 
[ , ex • Agassiz, Poiss. Loss. vol. v. pt. ii. 1844, p. 139 (name onl})] 
An imperfectly definable genus, known only by the head, 
closely resembles that of Eomyrus but appears to have a s o 
rostrum. 
Rhynchorhinus branchialis, sp. nov. 
[Plate XVIII. fig. 4.] } y 
1844-45. Rhynchorhinus branchialis, L. Agassiz, Poiss. Foss. 
pt. ii. p. 139, and Rep. Brit. Assoc. 1844, p. 308 (name on J • 
Type. Abraded hinder portion of skull and mandible , 
Museum. , 
The typo species, with skull about 0'05 in length. 
occiput equalling about one third the total length of the cr,in ^ 
length of coronoid region of mandible exceeding half that o 
dentary border. 
Form. 4' Loo. Lower Eocene: London Basin. 
P- 633. Type specimen, very imperfect and much abraded, 
and mandible, 
prising the hinder half of the cranium 
of the left preop 1 
ercul 11111 ? 
erton Coll- 
hyomandibulars, and part 
London Clay, Sheppey. 
P- 163. Slightly smaller abraded skull and mandible of the^ ^ 
type, shown in right side-view and from above ^ 
natural size in PL XVIII. figs. 4, 4 a ; Sheppey- liinits 
occipital region is shortened by abrasion ; but e ^ 
of the parietals (pa.), extending as far ferwar s^ j 
postorbital prominence, are shown. The squamo- 
are extremely attenuated and produced in ^ 10 " ’ j n a 
anterior ends of the frontals (/r.) arc ex cava ^ ^ 
sharp re-entering angle wbero they articulate 
relatively large mcsethmoidal rostrum (fth-)- atl( l 
expanded hyomandibular (hm.) is well preserve ^ ^ 
the mandibular articulation is directly benea 1 ma n- 
orbital prominence. The coronoid region o rcfCrve d 
dible is relatively large ; and the onlj we 1 
