Nj.i-io. SYXOPSTS OF NORTH AMERICAN TELLIXID.E—DALL. 825 



valve near the mavo-lns with obscure striations. Lon. 32, alt. 14^ 

 diam. H.5 nnn. 



Ti/jjc— No. 90252, U.S.N.M., dredg-ed in 'd'd fathoms, sand, in 

 Panama Bay, at station 2795, by the U. S. Fish Commission. 



Only a left valve of this species was obtained, which bears a notable 

 res(Mnhlance to Mdcoina e-xtenuata Dall, from the Gulf of jVIexico. In 

 that species, besides the difference of size the pallial sinus seems to 

 approach proportionally nearer the adductor and to be more exten- 

 sively confluent below. More material is necessary to determine the 

 relations of the Atlantic and Pacific shells. 



Suppleiiicntari/ note. — The details of many matters which are briefly 

 sunmiarized in this paper may be found in full in Trans. Wagner 

 Institute of Science, Volume III, No. 5. 



EXPLANATION OF THE PLATES. 



Plate IL 



Fin. 1. Macoma limula Dall, North Carolina; lon. 13 mm.; see p. 315. 



2. Tcllina iheringi Dall, La Plata; lon. 27.5 mm.; see p. 311. 



3. Tellina georgiana Dall, Georgia; lon. 32 mm. ; see p. 310. 



4. Macoma mitcheUi Dall, Texas; lon. 15 mm. ; see p. 314. 



5. The same Dall; dorsal view. 



6. Tellina {Angidus) fagrlhim DaW, West Indies; lon. 9.5 mm.; seep. 312. 



7. Macoma (Psammacoma) ea-tenuata Dall, Gulf of Mexico; lon. 14.5 mm.; see 



p. 314. 



8. Tcllina {Elliptotellina) americana Dall, North Carolina; lon. 6.5 mm. ; see p. 311. 



9. Tellina {Angulus) colorata Dall, "West Indies; lon. 13.5 mm.; see p. 313. 



10. Tellina {Merif<ca) crystallina "Wood, South Carolina; lon. 23 mm.; see p. 311. 



11. Tellina {Aiigidus) jirovtera Dall, Bermuda; lon. 18.5 nnn.; see p. 312. 



Plate III. 



Fi(i. 1. Tellina [Moerella) ??7erop.'f/.s Dall, California; lon. 16 mm.; seep. 317. 



2. Tellina (Merisca) rerlum. Dall, Gulf of California; lon. 20 mm.; see p. 315. 



3. Tellina (Angulus) panome/isi-s Dall, Panama; lon. 9.5 mm.; see p. 319. 



4. Tellina (Angulus) reciirva DaW, Gulf of California; lon. 12 mm.; see p. 320. 



5. Macoma alaskana DaW, Lituya Bay, Alaska; lon. 15 mm.; see p. 323. 



6. Tellina (Peronidia) saniar osss DaU, young shell; lon. 15 mm.; seep. 321. 



7. Tellina (Angulus) macneil ii DaW, Guaymas; lon. 13 nnn.; see p. 318. 

 «. Tellina (Moerella) paziana Dall, La Paz; lon. 9 mm.; see p. 318. 



9. Tellina (Ellipiotellina) jxieifira DaW, Panama; lon. 8 mm.; see p. 316. 



10. Tellina (Angulus) suffusa Dall, Ldwer California; lon. 13.5 nnn.; see p. 319. 



11. Tellina (Angidus) ce.rrosiaxa Dall, Cerros Island, Lower California; lon. 7 mm. ; 



see p. 319. 



12. Tellina (Moerella) (iinianta J)aW, Gulf of California; lon. KJ.anim.; seep. 317. 



Plate I"\^. 



Fi(i. 1. Tellina (Peronidia) santarosic Dall, Santa Barbara, California; lon. 52 mm.; 

 see p. 321. 



2. The same, interior view. 



3. Macoma (Psammacoma) panamensis Dall, Panama; lon. 31.5 mm.; see p. 324. 



4. Jfacoma Zejotonofdea Dall, Santa Barbara Channel, California; lon. 21 nnn.; see 



p. 323. 



