52 



of this animal before submitting them to microscopical ex» 

 ami nation. 



MM. Quoy and Gaimard say the animal is also found at 

 Guam Island. 



I have much doubt on my own mind if this species is not 

 identical with A. suhundulata, Angas. Zool. Proc. 1865, p. 155. 

 I have marked in italics the difference between this species 

 and the preceding. Its habits are different, as it is found 

 generally out of water on rocks. Not common at Southport, 

 where alone I found it. Mr. Angas found it at Port Lincoln, 

 South Australia ; and Mr. Archer found it in Hobson's Bay, 

 Victoria. Mr. Angas says {Zool. Proc. 1867) that the worn 

 specimens of this shell are prettily marked with a cross. I 

 have not found it so, but I have found it the case with the 

 worn specimens of the young of a new and large species of 

 Acmsea, which I shall now describe for the first time. 



AcMiEA CEUCis. n.s. A.t. ovata, postice latiuscula, alta, 

 conica apice acuta, ante mediano, sordida, scepe eorrosa, 

 absque liris radiantihus ; striis tamen incrementi irregtilarihus 

 (sub lente confertissimis) ; marrjine acuto, intecjro, intus linea 

 fusca constricta exacte Jimbriato ; aliquando rufo fiisca tesselato ; 

 intus alba nitida, encausta, irregulariter rucjosa; spatula eleqanter 

 lineis undulosis rufo-fuscis marrjine, concentrice dejinita et 

 lineis radiantibus decussata, intus coeruleo-albo nebuloso. Long. 

 31, Lat. 31, alt. 19 mil. 



Shell ovate, broader behind, very high, conical ; apex acute 

 antemedian, sordid white, often corroded withotot any radiat- 

 ing ribs, but irregularly and finely concentrically sulcate with 

 lines of growth ; margin acute, entire, ovate, fringed with a 

 well defined brown line which is often tesselated with red 

 brown, above this line, the interior is white and highly en- 

 amelled ; spatula well defined by undulating concentric rich 

 red brown lines, and crossed with radiating lines; in the centre 

 the spatula is clouded with pale or opalescent blue. 



When this shell is cast upon the beech it is quite of a 

 different appearance. The apex has radiating brown lines 

 generally in the form of a Maltese cross. The rest of the 

 shell is white and the margin worn away. There is a limpet 

 with a cross upon the apex figured in Wood's Index Testa., 

 p. 189, sp. 78, and named Patella cruciata, with the following 

 references, which I have not been able to verify. Acmcea 

 Lin. Sys. M. U. Schr. Em. ii. 432, pi. 5, f. 6.— A. c. Han. Ips. 

 Lin. 429. Loeality unknown. This limpet, however, has a 

 white cross on a brown ground. In the Proceedings of the 

 Linnean Society, 1859, Mr. S. Hanley, on the Linnean MS. in 

 the Museum Ulricae, has this extract " P. cruciata, P. ovalis con- 

 vexa, integerrima, cnicepicta." The name cruciatus (tormented) 

 is evidently a grammatical mistake. 



