210 rhynchonellidj:. 



Rhynclionella psittacea. 



Fig. 91. 



Shell sub-triangular, contracted above, the beak produced into a decurved 

 horn ; surface striated, foramen triangular. 



Aiiomia rostrum psittaci, Chemn. Conch, viii. 106, t. 78, fig. 71.3. 



Anomia psittacea, Gmelin, Syst. 3348, No. 41. — Dillwyn, Catal. i. 29G. — Wood, In- 

 dex, pi. 11, fig. 27. — TuRT. Conch. Diet. 5, fig. 42-44. 



Terebratula psittacea, Deshayks, Encye. Me'tli. Vers. iii. 102, pi. 244, figs. 3, a, b, c. — 

 Lam. An. sans Vert. 2d ed. vii. 333. — Turton, Brit. Biv. 23G. — Fleming, Brit. 

 An. 368. — Thompson, Ann. Nat. Hist. xiii. 433 ; Brit. Mar. Conch. 127. — Brown, 

 111. Conch. Gr. Brit. 68, pi. 46, figs. 2-4. — Crouch, Introd. Lam. Conch, pi. 13, 

 fig. 4. — SowERBY, Genera, fig. 5 ; Thesaur. i. 342, pL 71, figs. 78 - 80. — Sowerby 

 (Junior), Conch. Man. fig. 202. — Gould, Inv. of Mass. 141, fig. 91. — Reeve, Conch. 

 Syst. pi. 126, fig. 5. — Middendorff, Malac. Ross, part 3, p. 1, t. 11, figs. 11-17. 



Hijpolhiiris psittacea, King, Ann. Nat. Hist, xviii. 238 (1846). — Forbes and Hanley, 

 Brit. Moll. ii. 346, pi. 67, figs. 1-3 — Stimpson, Shells of New England, 7. 



Ehi/nchonclla psittacea, Owen, Trans. Zool. Soc. i. 145, pi. 22, figs. 12-14 (animal). — 

 Adam.'^, Genera, ii. 582, pi 132, figs. 2, 2a, 2 b. — Chenu, Man. dc Conch, ii. 219, 

 figs. 1126-1128. 



Shell thin and fragile, brownish-black or sea-green, of an inflated, 



triangular form, one of the valves produced into a long, pointed, and 



strongly curved beak, something like a parrot's 



Fig. 501. beak ; along this runs a triangular channel, formed 



by the inflected margins, the third side of which 



is comiilcted by the tip of the other valve ; the 



smaller valve is obovate or faii-sha[)ed, about two 



thirds the length of the longer valve ; surface 



marked with concentric lines of growth, and with 



numerous, flue, diverging stria3, increasing in 



number as the shell widens. The interior bony 



processes consist of two slender, curved, parallel 



prongs, arising from the base of the teeth of the 



upper valve. Height, one half inch ; length, 



R. psittacea. scvcii twcutieths of ail inch; breadth, one fifth 



of an inch. 



I have as yet met with only one specimen of this shell of the 



above dimensions, which was taken from the stomach of a codfish. 



It appears to be everywhere rare, and is probably an inhaljitant of 



more northern seas, especially the region of Newfoundland. 



[Deep sea Coral Zone, Northern Coast (Sfimp.'^on) ; Banks of St. 

 Margaret's Bay ( Willis) ; Dronthcim to North Cape (dredged in 

 forty to one hundred and fifty fathoms) (^McAiidreiv) ; Russian 



