DR. P. P. CARPENTER ON CHITONID.E AND ACM.ElDai. 



tenuiore ; i. jun. lavi ; dein lirulis deUcatiilis, acutis, hand 

 gi-camlosis, valde distantibus, ititerdum ohsolcfis, filosa ; intcr- 

 stitiis latis, Icevibiis ; tenui,2da7iata,ovali,subdi{phana; in<jro- 

 fiisco, corneo radiatim stric/ata, seu varie maculata : tnttts 

 livida seu albida, coluribiis externis tr anseuntibus ; limbo fato, 

 acuto. 

 Long. •7, lat. •.t6, alt. '12. 



= Lottia 1 patina, C. B. Ad. Pan. Shells, no. 3G7. 

 Jlab. Panama (C B. Adams). 



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

 can be affiliated, unless they prove to be a very delicate variety of 

 A. Jloccata, Rve. 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. fascicidaris ; in 

 the latter respects, A. strigatella. They were named " tenera, Ad." 

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

 species. 



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



A. t. "A. var. filosse" simili, sed siibrotundata, magis elevata, 

 vertice siibcentrali ; colore inte^isiore, lineis cornels crebriorihus, 

 arH/vstis ; t. jun. scepe pallidiore, radiis duobus postice triun- 

 gulata : intus callo livido, tenuiore. 



Long. -53, lat. '45, alt. -1.5. 



— Lottia, sp. ind. o, C. P. Ad. Pan. Shells.no. abS. 



llab. Panama ((/. B. Adams j, 



ACM.EA (? var.) VERNICOSA. 



A. t. parva, subrotundata, depresso-conica, apice ad dnas qnintas 

 partes sito ; albido-viridi, strigis paucis rufo-fuscis hie et lllic 

 ornata, srepius radiis duobus candidis, postice triangulata ; 

 e.vtus lineis acutis rudiantibus, valde distantibus, scepe obsoletis 

 vix scidpta : intns livida, callosa, scepius spathula Candida or- 

 nata ; basi subplavata, limbo ungusio. 

 Long. -3, lat. -'14, alt. -1. 

 Hab. Panama {Jeweft, C. B. Adams'). 

 = Lottia, sp. ind. b, C. B. Ad. Pan. Shells, no. 369. 

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

 been taken for the young of A. biradiatn, Rve. From its 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 diflFers from the young of A. subrotundata in being much 

 thicker and less spotted with the green tint. 



268 



