HOUN EXPEDITION — PAL/EONTOLOGY. 115 



Fig. 3. — Orthoccras larapiiilcnse, \\. sp. Natural size. 



,, -1. — Eitiluccras aniianUm, n. sp. End view uf septal surface. 



,, 5. — Trochoccras rcciiiostaliiin, n. sp. a, portidii of two wliorls, the inner 

 shewing septa ; /', section uf outer whorl ; t', dor.sal aspect of outer 

 whorl. 



,, 6. — Eunciiia larapinla, n. sp. Slightly enlarged. 



„ 7. — Or//i<>ci/'(ts il>iciji>niu\ n. sp. <;, a cast, natural size; /', end view of 

 septal surfact! of another specimen, with test preserved. 



,, 8. — hoarca com/i^aftu n- sp. x 3. 

 ,, U. — Pleronites inicans, n. sp. x 3. 



Plate II. 



Fig. 10. — Orllidccras niicro/i/iia/iu/i, n. sp. a, siphuneular aspect; /', niagnilied 

 jiortion of test. 



,, 11. — Endoccras, sp. Siplumcle, partially enihraced Ijy the septa. Siphun- 

 eular and opposite aspects, s., siphuncle, sp.^ septal chandjers. 



,, \'l. — hoarca nastii, n. sp. a, type, natural size; h, var. uiodioheforniis, 

 natural size. 



,, 13. — Conouifdiii/ii, sp. iud. 



,, 1-1. — Palicana 'cvaltii, n. sp. Natural size. 



,, 15. — hoarca etheridgei, ii. sp. 



,, IG. — hoarca opiforiiiis^ n. sj». «-/', casts of two exaniph.'s. 



,, 17. — hoarca wattii, n. sp. </, front view of cast ; h, dorsal aspect of tlic same. 



,, 18. — hoarca orbicularis^ a. sp. (C, cast slightly enlarged ; b, wax-impression 

 of exterior mould. 



,, 19. — hoarca crassate/licjorinis, n. sp. Wax impression of exterior mould. 



,, 20. — Orthis diihoioiJiaiis, n. sp. a and /', dorsal and venti-al valves ; c, iiinge- 

 line ; d, section of the closed valves. 



Plate III. 



Fig. 21. — ^Isap/iiix illarciisis^ Eth., f. a and /', anterior and postei-ior p.-irts ; 

 (•, end view. 



„ 22. — Hypostouie of an .isap/uts {A. illarcnsis'i). 



„ 23. — Hypostonic of an Asapkus {A. howchini i). 



