0^4 REPUKT — 18C3. 



r. 



11. Modiola capax, Conr. Galapagos, Cuming. [Lower] California, NuffaV. 



MazatliUi, Carpenier. [^lieiytn is the authority fur the shells described 



in the Maz. Cat., not Cpr.] 

 17. Modiohi BrazilienKis, Chem. " Brazil." [At f. 31, which appears the true 



Brazilian sh-ll, we are informed that this specimen is a " variety troa 



Guayaquil."] 

 .. Modiola nUenx, "Cpr. Cat. Reifren Col. Brit. Mus. California." [The .'•hell 



was erroneously de.<»cribed as from " California " in P. Z. 8., and does not 



Spear in the Keip^en Mazatlan Cat. : = •!/. subjmrpunus, Mus. Cum.J 

 >mus cinnamominus, Chem. Philippine Is. and St. Thomas, W. I. \_ = L. 

 cintuimomeus, Maz. Cat. 177. Probably an AdiiJa.'] 



8. Lithodomm Cumingianus, Ukr., MS. " North Australia and Mazatlan." [The 



species is Jiytired from the Mazatlan specimen, which may probably be 

 the adult form of L. calycidutus, Cpr.* The cup is not distinct, but ' 

 shows a tendency to the peculiar formal ion described in Maz. Cat. no. 174. 

 Rve.'s diaj^nosis, however, appears written from Dkr.'s Australian fipeci- 

 mens, so labelled in Mus. Cum. — a very distinct species, without incrus- 

 tations. The name wa« riven bv Mr. Cuming to a large Chilian species 

 brought by the U. S. Expl. E.\n. j 

 13. Lithodomm Gruneri, Phil. MS. in Mus. Cum. "N. Zealand." [The species 

 =i L. falcatus, Gld., and is certainly from California, where ii is found in 

 the rocks with Pholadidea petiUaA 



13. Lithodomvs teres, Phil. "Mazatlan. [The specimens in Mus. Cum. are 



labelled " Cagayan, PhU."] 



14. Lith()doinuscoarctata,\ykr. Galapa<ros, Cwwi'x.^. [=0"«'h*'//« c.,Maz. Cat. 172.] 

 IG. Lithodomus caudigerus, Lam. " West Indies " [without authority]. " Tiie 



calcareous incrustation produced beyond the ant. extremity is no specific 

 characteristic." [^Vide reasons for contrary opinion, Maz. Cat. no. 170: 

 = L. aristatiis. Dr. Stimpson has seen Lithophagus arranging its peculiar 

 incrustation with its foot.] 



24. Lithodomus pessulatm, Rve. (Oct. 1857). Hab. ? — [The unique sp. figured is 

 labelled " Mazatlan " in Mus. Cum. It resembles plumulu, with ventral 

 transverse rugae.] 



26. Lithodomus sttbula, Rve. Hab. ? — [=L. plumuJa, var.J 



6. Avicula Cumingii, Rve., March 1857. " Ld. Hood's Is., Pacific Ocean, 



attached to rocks, 10 fms., Cuming." \j=Maryaritipho)a Jimbriata, 

 Dkr., var.] 



9. Avicida barbata, Rve. Panama, under stones at low water, Cuming. [=3/. 



Jimbriata, J)\iT.,=: 3L Mazatlanica, Hani.] " DiHers from Ctimimjii iu 

 regular sequence of scales, developed only at margin, and yellowish tone 

 of colour." 

 67. Avicula heteroptera, Lam. N. Holland. " =:A. sterna, Gld." [Gould's species 

 is from Gulf Cal. ; but in Mus. Cum. it is marked inside " semisugitfn. '] 

 4. PlacH iHinotnia foliata, Brod. Is. Muerte, Bay Guayaquil. " May = ec/«'«a<a, 

 AV. I., but has very much larger orifice." 



7. Flucuiianomia niacroschisnta, Desh. " Onalaska, Cuming" [who never was 



there]. Kamtschatka, Desh, [Vancouver district, abundant.] 

 7. thracia pUcata, Desh. " Mr. Cuming has specimens from California and St. 

 Thomas, W. I." [Cape St. Lucas, Xantus.] 

 Melimia. [Various species are described from " Central America," &c., which 



or supposed, are rejected altogether. Thus shells sent to Mr. Cuming, with authentic 

 name and locality attached, may appear soon after ■without any, or ^vifh erroneous, 

 quotation. The error is rendered graver by appearing with the weighty authority of 

 " Mus. Cum." 



* The specie? dejcribed in the Brit. Mus. Cat. seldom appear in the monographs, 

 unless there happen to be a specimen in Mu.s. Cum. Some of the monographers often 

 content themselves with figuring the shells that come most easily to hand ; and do not 

 eeem to consider it a part of their work to pas? juds^nient on previously described 

 Bpeoies, or to concern themselves tilth, what are imall or difCcult. 



50 



