THE ANNALS 



AND 



MAGAZINE OF NATURAL HISTORY, 



[FIFTH SERIES.] 



" per litora 8pargite museum, 



Naiades, et circiim vitreos consiclite fontes ; 

 Pollice virghieo teneros h'lc earpite flores : 

 Floribus et pietmn, divse, replete canistrum. 

 At vos, o Nyraphse Craterides, ite sub undas ; 

 Ite, recurvato variata corallia trunco 

 Vellite musoosis e rupibus, et niihi conchas 

 Ferte, Deae pelagi, et pingui conclwlia succo." 



N. Partheiiii, Giannettasii Eel. I . 



No. 97. JANUARY 1886. 



I. — On a living Sjnnose HhjnchoneWa. from Japan. 

 By the late Thomas Davidson, LL.t)., F.R.S. 



[Introductory. — The material for this paper was found on 

 Dr. Davidson's table after his death, with a wood-block drawn 

 from his own illustrations. In accordance with his wishes I 

 have prepared for press the following short notice of this new 

 and most interesting recent Brachiopod, the last he was des- 

 tined to figure and describe, for death put an end to his life- 

 long labours on the Brachiopoda on October 14. 



Dr. Davidson intended this paper for the ' Annals and Maga- 

 zine of Natural History,' and it now seems peculiarly fitting 

 that it should be published in the periodical which issued his 

 first important memoir on the group, that " On the Classifi- 

 cation of the Brachiopoda" (vol. ix. 2nd series, 1852), just 

 thirty-three years ago. — Agnes Crane.] 



Rhynchonella Doderleiniy Dav., n. sp. 



Shell transversely subpentagonal, wider than long, hinge- 

 line obtusely angular. Dorsal valve deep, posteriorly uni- 

 formly convex, anteriorly divided into three lobes, the central 

 one forming a broad, rounded, mesial fold, varying in eleva- 

 tion according to the age of the individual. Ventral valve 

 much less deep than the dorsal one, with a broad mesial sinus 

 of greater or lesser depth commencing at a third of the length 

 of the shell and extending to the front. Beak moderately 

 produced, almost erect, with an oval-shaped foramen situated 

 under its gently incurved angular extremity and margined 

 by narrow deltidial plates. Lateral margins of the valves 



Ann. & Mag. N. Hist. Ser. 5. Vol xvii. 1 



