240 DE. T. DAVIDSON ON EECENT BEACHIOPODA. 



Figs. 5-6 a. Glottidia Palmeri, Dall. Dredged by Dr. Palmer in the Gulf of California, on the Lower 



Californian side, opposite the mouth of the Colorado river; one of ten examples ohtained; 



presented by Mr. Dall (Davidson Coll., Brit. Mus.). 5 a. Interior of dorsal valve. 6 a. Of 



ventral valve. 

 Figs. 7-9. Glottidia Audebarti, Broderip. A series of specimens from Guayaquil. 7. Broderip^s type. 



8. After Reeve. 9, 9 a. Exterior ; 9 b. Interior of ventral valve, showing the two diverging 



septa. 9 c. Interior of dorsal valve, showing a single median septum (Davidson Coll., 



Brit. Mus.) . 

 Figs. 10, I0«-1I. Glottidia Audebarti. These specimens, representing L. pyramidata, Stimpson, sp., 



were dredged by Prof. E. Morse in North Carolina waters (Davidson Coll., Brit. Mus.). 

 Fig. 12. Glottidia 1 semen, Broderip; Isle of Plata, West Columbia. After Broderip. Type in Zool. 



Dept., Brit. Mus. 

 Fig. 13. Glottidia? antillarum, Reeve. After Reeve. Martinique (Cuming Coll., Brit. Mus.). 

 Figs. 14, 15. Lingula tumidula, ^eeve. 14. From Masbate, Philippines ; after Sowerby. 15. Moreton 



Bay, Australia; after Reeve. (Brit. Mus.) 

 Fig. 16. Lingida lepidula, A. Adams, probably the young stage of another species ; Seto-Uehi (Akasi), 



Japan (Davidson Coll., Brit. Mus.). 

 Figs. 17, 18 «. Lingula Reevei, Davidson, formerly L. ovalis. 17. A fine large specimen, after Reeve; 



Sandwich Islands (Cuming Coll., Brit. Mus.). 18, 18a. Another specimen; same habitat 



(Davidson Coll., Brit. Mus.). 

 Fig. 19. Lingula Adamsi, Dall. Dredged by Capt. Weston near the shore of the island of Formosa 



(Davidson Coll., Brit. Mus.). 

 Figs. 20-21 a. Lingula exusta, Reeve. 20. After Reeve ; Moreton Bay, Australia (Zool. Dept., Brit. 



Mus.). 21, 21 a. Another specimen ; same habitat (Davidson Coll., Brit. Mus.). 

 Fig. 22. Lingula hirundo, Reeve. After Reeve. Port Curtis, north-east Australia (Cuming Coll., Brit. 



Mus.). 

 Figs. 23, 24. Lingula jaspidea, A. Adams. 23. Adams's type ; Mososeki, Japan. 24. A fine large 



example dredged by Sir E. Belcher (Davidson Coll., Brit. Mus.). 

 Kg. 25. Lingula smaragdina, A. Adams ; Yobuko, Japan. Adams's type (Davidson Coll., Brit. Mus.). 



Plate XXIX. 



Figs. 1-8. Lingula anatina, Lamarck. 1, 2, 4, 5. A series of specimens of a brilliant emerald-green, in 

 diftcrent stages of development, dredged at low water by the ' Challenger ' Expedition off 

 Zamoanga, Phihppines. 1. Zool. Dept., Brit. Mus., others Davidson Coll. 3. A specimen from 

 Manilla, collected by Mr. H. Cuming (Davidson Coll., Brit. Mus.). 6. Interior of upper valve. 

 7. Interior of lower valve. 8. A specimen with its peduncle seen in profile, after Gratiolet : 

 a, ventral valve ; b, dorsal valve ; c, base of peduncle. 



Figs. 9, 10. Lingula affinis, Hancock. 10. Shell from the type forwarded, but which I take to be a 

 valve of Lingula anatina. 9. Ventral view of the animal of Lingula affinis, after Hancock 

 (Trans. Roy. Soc. vol. cxlviii. 1858, pi. Ixvi. fig. 3). "The dorsal labial lobe divided longi- 

 tudinally, and one half of it turned back, so as to expose the pallial chamber; the marginal 

 setae are not represented : a a, pallial sinuses ; b, marginal fold ; c, liver seen through the wall 

 of the perivisceral chamber ; d, dorsal ovaries ; e, e, intestine; /, lateral walls of the body, or 

 perivisceral chambers ; g, anal nipple ; h, brachial apparatus ; i, cirri ; j, adjustor muscles ; 

 k, divaricators ; /, anterior wall of body." 



