18/1.] MR.T. DAVIDSON ON JAPANESE BRACHTOl'ODA. 305 



This beautiful species has been well described by Adams and 

 Schrenck. It varies considerably in shape and colour, so much so, 

 indeed, that Dr. Schrenck has proposed to distinguish some of its 

 shapes by the designations of Forma normalis, Forma longior, and 

 Forma latior ; but all these variations merge one into the other when 

 we examine a large series of specimens. Some young and middle- 

 aged examples are of a light yellow colour radiated with red. Other 

 specimens present a uniform red colour, especially deepened in tint 

 near to, and at, the concentric lines of growth. Some examples have 

 also attained to 2 inches in length, with a slightly greater breadth. 



Hab. Dr. Schrenck states this shell to be the most common of all 

 the Brachiopoda in the sea of North Japan. Mr. A. Adams ob- 

 tained it abundantly in 7 fathoms, along with W. graiji, at Hako- 

 dadi, also off Okerisi Island in 25 to 35 fathoms, six miles distant 

 from the shore, and from a bottom of coral and rock. It occurs also 

 at a depth of 48 fathoms in the Straits of Korea and in several other 

 parts of the Korean archipelago. 



A yellow Terebratula (Plate XXXI. fig. 6) was sent to me by 

 Mr. A. Adams as a yellow variety of T. coreanica, and as having been 

 dredged at Hakodadi ; but I feel considerable uncertainty as to its 

 being thus correctly identified. The loop was unfortunately entirely 

 broken, so that I could not ascertain its internal characters. In ex- 

 ternal shape it much resembles some young examples of Waldheimia 

 venosa or of Terebratella pulvinata. I will not, therefore, venture 

 upon a specific identification, but have given a figure of the shell in 

 the hope that it may be hereafter properly identified. 



Terebratella marine, A. Adams. (Plate XXX. figs. 15, 

 16, 17.) 



Terebratella marice, Adams, Annals & Mag. of Nat. Hist. 3rd ser. 

 vol. v. p. 412, May 1860; and Annals, 3rd ser. vol. xi. Feb. 1863. 



This pretty and very interesting little species was correctly de- 

 scribed by Mr. A. Adams. It is a very important shell, as it nearly 

 approaches in shape and character to the Pliocene species from 

 Sicily, described by Seguenza as the Terebratella septula of Philippi. 

 It is of a pure white colour, with numerous delicate concentric lines 

 of growth. None of the specimens found by Mr. Adams seems to 

 have exceeded some 6 lines in length by 4 in breadth. It is con- 

 sidered by Mr. Jeffreys the living representative of the Sicilian 

 fossil species ; but this last attained much larger proportions, and 

 would appear to be more finely punctuated than is the Japanese 

 shell, so that I should not like to affirm the positive identity of the 

 two shells, although Mr. Jeffreys may be correct in his conclusions. 



Hab. Uraga, 21 fathoms; Gotto, 48 fathoms; Satauomosaki, 

 55 fathoms. 



Terebratella spitzbergensis, Dav. (Plate XXX. figs. 13, 

 14.) 



This well-known species, according to Torell, seems to have been 

 Proc. Zool. Soc— 1871, No. XX. 



