DR. P. P. CARPENTER ON CHITONTD.E AND ACMjEIO.E. 



tenuiore ; t. jnn. Ifcri ; dein lirulis deUcatitlis, aciitis, hand 

 grnnulosts, valde distantihus, interdum obsolctis, fdosa ; tnter- 

 stitiis I at is, [<tvibns ; teniii, plnnatu, ovali,subdi( phana ; mtjro- 

 f II SCO, cornet radiatim sfrii/afn, sen vurie macidata : intus 

 Vu'ida sen alLida, coloribus externis transcnntihus ; limbo Into, 

 acuto. 

 Long. •/, lat. '.56, alt. '12. 



= Loftia 1 patina, C. B. Ad. Pan. Shells, no. 367. 

 JIab. Panama (C. B. Adams). 



There is no described west-tropical species to which these shells 

 can be affiliated, unless thev prove to be a vcrv doUcate variety of 

 A. floccata, live. Unfortunately the Panama limpets have never 

 been collected in sufficient numbers to make out their specific limits 

 satisfactorily. The names here given may stand as species or va- 

 rieties, according to future elucidation. In shape and texture, but 

 not in colour or sculpture, these shells resemble A. fascicular is ; in 

 the latter respects, ./. strigatclla. They were named " tenera. Ad." 

 by Dr. Dolirn, but are sufficiently distinct from that West-Indian 

 species. 



ACM.EA (? FLOCCATA, var.) SUBROTUNDATA. 



A. t. "A. var. filosse" simili, sed suhrotundata, magis elerata, 

 vertice subcentrali ; colore intonsiore, lineis cornels crebrioribus, 

 anrpisfis ; t. jun. stepe pallidiore, radiis diiobhs postice triuU' 

 gnlata : intus callo livido, tenuiore. 



Long. '03, lat. '45, alt. "I.t. 



= Lottia, sp. ind. a, C. B. Ad. Pan. SheIU.no. 3bS. 



Uab. Panama (O. B. Adamnj. 



ACM.EA (? var.) VERNICOSA. 



A. t. parva, subrotvndafa, depresso-conica, apice ad diias quintas 

 partes siio ; albido-viridi, strigis panels rufo-fuseis hie et illic 

 ornata, srepius radiis duobns candidis, postice triangnlata ; 

 extus lineis acntis rudianfibns, valde distantibns, scepe obsoletis 

 vix sculpta : intus licida, callosa, stepius spathula Candida or- 

 nata ; busi snbplanata, Umbo anguslo. 

 Long. -3, lat. '24, alt. -1. 

 Ilab. Panama {Jewett, C. B. Adams). 

 = Lf*tia, sp. ind. b, C. B. Ad. Pan. Shells, no. 3G9. 

 Had this form been brought from the China Seas, it might have 

 been taken for tlie vouna; of A. biradiata, Rve. Prom it? solidity, 

 however, its rough exterior, and its callous interior, it appears to 

 be adult. It is barely possible that it may develope into A. vesper- 

 tina. It differs from the young of A. subrotundata in being much 

 thicker and less spotted with the green tiut. 



268 



