[TAYLOR] MARINE MOLLUSCA 23 



CATALOGUE OV SPECIES, WITH ^OTK.S, 



BKACHIOPODA. 



The I'eceiit Brachiopoda, and especially the Ameneaii species, have 

 been well worked up h}^ Dr. Dall. To his numerous papers on the sub- 

 ject in the American Journal of Conchology (vols. vi. and vii.) and 

 in the Proceeding's of the Academy of Natural Sciences of Philadelphia, 

 the student is referred for extended notices of our British Colunitiiun 

 forms.' 



TEREBKATULIXA. D'Orbigny. 



1. Terebratulina unguicula, Carpenter, sp. 



Terebratula unijuicida, Cpr., Kept. Brit. A-ssdc, 1.S(;;^, p. (W() (Aug., 1S(U): and 

 Proc. Zool. Soc. London, lS(io, p. 201, fig. 1-4. 



This species is now generally cousideretl to be only a variety of T. 

 caput-serpentis, Linne, sp. {Anomia caput-serpentis, Linn., Syst. Nat., 

 ed. xii., vol. i., pt. 2, p. 1158, no. 236, 1767) which is, of course, the 

 older name. Our species or variety was tirst described as from " San 

 Diego 6 fms., Monterey, not rare in 20 fms. Cooper, Neeah Bay (valve) 

 Swan, Vancouver, Forbes." It is not rare at Victoria and Departure 

 Bay and has been dredged by Dr. Dawson in the Straits of G-eorgia, 

 Discovery Passage, Johnston Strait and Forward Bay. Probably it 

 will be found to occur throughout the province. Generally specimens 

 are found attached to stones or dead shells dredged in from 1 to 100 

 fathoms, but on one occasion I obtained a fine series attached to the 

 hairy epidermis of a living S]>eci men of Trifonium Oregonense. Dr. Dall 

 states that specimens from deep water are generally larger than those 

 from near low water mark.. 



TEREBRATELLA, D'Orbigny. 



2. Terebratella transversa, Sowerby, sp. 



Tirebrutula transversa, Sby., Proc. Zool. Soc. London, 1S4(), p. 94 : and Tiies. 

 Conch., vol. L, p. 261, pi. 72, fig. 114-11.5 (184t5) = Terebratula cauHna, 

 Gould, Proc. Bo.st. Soc. Nat. Hist., vol. iii., p. Ml (December, 18i50) ; and 

 U. S. Expl. Exped., p. 468. figs. .582-582c (1852). 



This is an extremely common shell with us. It occurs in two dis- 

 tinct forms — a smooth deep-water form, which is the typical transversa, 

 and a highly sculptured form occurring in thousands between tides, and 



' Description.s of all our species are contained in Ball's " Report on the Brachio- 

 poda of Alaska and the adjacent shores of Northwest America." Proc. Acad. Set. 

 Phil., 1877, p. looetseq. 



