ON MOLLTJSCA OF THE WEST COAST OF NORTH AMERICA. 



639 



48. Macoma seefe,Conr.Hanl. Large,flat, rounded, glossy; -winged behind ligament. 

 43 b. Macoma var. edulis, Nutt. Northern form, less transverse ; texture dull. 



44. Macoma indent :da, u. s. Like secta, jun., but beaked, indented, and ventrally 



produced. 



45. Macoma yoldiformis, n. s. Small, white, glossy, very transverse ; ligament-area 



scooped-out. 

 40. Macoma nasuta, Conr. auct.-j-tersa, Gld. Large, beaked, twisted; mantle- 

 heud touching opposite scar in one valve. From Kamtschatka to S. Dieso. 

 Gape Lady Franklin, 76°, belcher, 1826. 3 ft., mud, between tide-marks. 

 Lord. 



47. Macoma inqtiinatajDesh. 'P. Z.S.18y>4:, ■p. 367. Like degraded »as«fc ; mantle- 



bend a little separated from scar in both valves. 

 47 b. Macoma ?edentula, Brod. & Sby. jun. ; or an abnormal var. of inquinata. 



48. Macoma Pvar. expansa. Scars like lata and calearea in Mus. Cum., but teeth 



not bifid, very thin, glossy. Scarcely difiers from lata, Desh. in B. M. 

 Greenland. 



49. Macoma inconspicua, Br. & Sby. = Sang. Calif orniana, Conr. Probably = " Fa- 



bricii=fragilis, Fabr." in Mus. Cum. Like thin, flat solidula: pink; var. 



large, white. 8-15 fm. Lyall. 

 60. Anffulus modestus, n. s. (Subg. of Tellina.) Lake tener, Say ; but with callus 



between mantle-bend and scar. White. 

 50 b. Anffulus Pvar. obtusus. Inside like modestus ; but beaks obtuse. 



51. Angulus variegatus, n. s. Shape of obtusus : no callus ; rayed vrith pink and 



yellow. 26-60fm. r. Q). 



52. ^»5rt<teffOT<?AV, Hani. MS. inMus. Cum. Small, white; ant. ventr. side swollen. 



53. Mara salmonea, n. s. (Scarcely differs from Angulus.) Small, subc[uadrate, 



glossy, salmon-tinted. Beach-20 fm. Cp. 



54. Tellina Bodegensis, Hinds, Voy. Sulph. Large, strong, transverse, with con- 



centric gi'ooves. 



55. Arcopagia lamellata, Maz. Cat. no. 58. One fine pair in shell washings. 



66» CEdalia subdiaphana, n. g., n. s. Thin, swollen, shape of Kellia, ligament sur- 

 rounding beaks : hinge with 5 bifid teeth (3-2) ; no laterals ; large mantle- 

 bend. 



57. Cooperella scintillt^ormis, n. s. New subgenus of CEdalia, Cartilage serai- 



internal : only 1 tooth bifid. 



58. Lutricola oSa, Conr. (Tellina'). For this group (=Capsa, "Bosc,'' Add. non 



Lam.), scarcely agi'eeing with either Macoma or Scrobicuhria, Blainville's 



125 



