MAZATLAN UNIVALVES 203 



263. Acir^A mesoleuca, Mice* 



A. t. "Acmceis imliyice et testudinali" simili ; tetiui, subdia- 

 phand, rarius solidiore : extus, apicem versus Icevi, postea lirulis 

 tenuihus suhdistantibus Irref/idaribus ornatii, S(Fpe minutissime 

 granulatis, interdum crassioribus, approinnquantihus ; fusco- 

 oUvaced, interdum fused, rarius nigro-fuscd ; varie tessellatd, 

 lineatd seu maculatd, interdum uni colore : infus, margine fhisco 

 et albido, seu nigro-fusco ; medio x>Tus mimisve viridi, seu, albido- 

 viridi, interdum Jlavescenteseujlavido-viridi; spathuld ftiscd, 

 sell fusco-oUvaced, capite subtrianguhwi, corpore interdum ir- 

 regular iter pectinato. 



Mke. in Zeit.f. Mai. 1S51, p. 38, no. 135, (diagn. supra auct.) 

 ? + A. miitabilis, pars, 3£ke. loc. cit. p. 37, no. 1.33. 

 = Patella diapliana, Rve. Conch. Ic. pi. 24, sp. 61, f. 61, a, b, 1854. 

 ? = Patella diapliana, Nutt. in Jays Cat. no. 2813, (sine diagn.) 

 ?=Lottia patina? C. B. Ad. Pan. Shells, p. 241, no. 367 (non 



A. patina, Esch.) 

 Pars ?= Patella (Acmsea?) personoides, Midd. Mai. Eos. pt. ii. 



p. 37. no. 10, pi. 1, f. 2, 1819 :— ( = A. ancj-loides, 3fld, olim, 



non Propilidium ancj'loide, Forbes.) 

 Var. ? = Patella (Acmfea ?) ferugtnosa, Mid. Bui. Acad. St. Pet. 



vol. vi. no. 20 -.—Mai. Eos. pt, ii. p. 38, no. 11, pi. 1, f. 1. 

 = Lottia pintadina (pars) Goidd Exp. Shells, 1846, p. 9. 

 Comp. PateUa floccata, Eve. Conch. Ic. 



„ „ vespertina, Eve. loc. cit. pi. 26, f. 67, a, b. 



„ ,, Cumingii, Eve. loc. cit. pi. 16, f. 37, a, b. 



Var. = PateUa striata, Eve. loc. "cit. pi. 33, f. 99, a, b. : (non 



Patelloida striata, Quo?/ Sf Gaim. Yoy. Astr. Moll. pi. 71, 



f. 8—11 -.—Eve. Conch. Ic. sp. 58.) 

 = Acmsea Antillarura, P. P. C. Cat. x>rim.: non Sow. ( = A. 



testudinalis, teste Gouhl Inv. Mass.) 

 = Acma;a patina, P. P. C. Cat.prov. {non Esch.) 



• It is difficult to say which name should be retained for this species. It is 

 figured as P. diaphana by Hceve, the name having been received by Mr. Cuming 

 from Jay as of JCuttall. Mr. Nuttall's own specimens however of "the green lim- 

 pet are from Mazatlan, nor does he remember taking them in California ; and 

 It is probable that he gave the name to the parallel variety of A. patina, to which 

 the green shells brought by Uinds, Kellett, iSce. were aiflliated. At any rate ir 

 can only claim priority from the date of its appearance in Reeve. Gould's name 

 would Have been retained, but that unfortiinately his type specimens consist of 

 P. verrieulata, leucophaja and seabra, iZre., with A. mesoleuca and laseicularis, 

 JUTce. If one or both of Middendorff's species should prove identical with the 

 Mazatlan species, the name A. personoides should be retained : but even that 

 author's very copious descriptions do not allow us to speak with cfpiidence, 

 without a comparison of types. Under these circumstances, as Mcnke s name, 

 though given later, certainly represents the Mazatlan species in its usual state, 

 it is thought best to retain it. 



