HALIOTIS. 



Plate Vin. 



Species 24. (Mus. Cuming.) 



Haliotis ziczac. Hal. testa ovatd, planulato-convexd, 



spiraliter suMilissime sulcata, foraminibus parvlusculk, 

 senis perviis ; oUvaceo-viridi, luteo-viridescente oblique 

 Jlammeo-undatd, apice luteo-aurantio tincfo, iidus ar- 

 gented, irridescente. 



The zigzag Haliotis. Shell ovate, rather flatly convex, 

 spirally veiy finely grooved, perforations rather smaU, 

 sis open ; dark oUve green, obliquely marked with 

 light yellowish green zigzag flames, apex tiaged with 

 orange yellow, interior sQver}', irridescent. 



Eeeve, Pro. Zool. Soc, 1846. 



Hab. Calipan, Island of ilindoro, Philippines (found on 

 smooth stones); Cuming. 



The colour, form, and general aspect of this shell very 

 much resembles those of the H. ijlahra ; it differs chiefly 

 in having the entire surface finely radiately grooved. The 

 zigzag design of the coloming is very characteristic. 



Species 25. (Mus. Cuming.) 

 Haliotis excavata. Hal. testd subrotundd, convexissimd, 

 spird elevatd ; spiraliter subtiliter liratd, liris striis 

 radimitibn-s decussati-s, rvgis brevibus obliquis circa 

 spirant concenlrice dispositis ; viridi-albicante, olivaceo- 

 fusco radiatim strigatd et variegatd, intus profundi 

 excavatd, albicante, pidclire irridescente. 

 The excavated Haliotis. Shell nearly round, very 

 convex, spire elevated ; spirally finely ridged, ridges 

 crossed with radiating striae, with short oblique v^m- 

 kles concentrically ranged round the spire ; greenish 

 white, radiately streaked and variegated with olive 

 brown, interior deeply excavated, whitish, beautifully 

 irridescent. 

 Lamarck, Anim. sans vert. (Deshayes' edit.), vol. is. p. 25. 

 Hab. Kangaroo Island, Australia. 



An interesting and weU-known species, fully distin- 

 guished from any other hitherto recorded by its rounded 

 convex growth. 



Species 26. (Mus. Cuming.) 



Haliotis Califormensis. Hal. testd ovatd, spird sub- 

 occidtd, Icevigatd aut decussatim striata, margins sinis- 

 tra latiusculo, coneavo-plano ; foraminibus mimdis, nu- 

 merosissimis, ditodecenis perviis, extus caruleo-nigri- 

 cante, intus albidd, margaritaced. 



The Californian Haliotis. SheU ovate, spire rather 

 concealed, smooth or decussately striated, left mar- 

 gin rather broad, concavely flattened ; holes very 

 small and numerous, twelve open; exterior blueish 

 black, interior whitish, pearly. 



SwAixsoN, Zool. Illustrations, vol. ii. pi. 80. 



Hab. California. 



This species has been separated with excellent discrimi- 

 nation by Mr. Swainson from the H. OracJierodii, from 

 which it exliibits little intelligible difference beyond the 

 unusual number and smallness of the holes ; in the speci- 

 men here figured there are as many as twelve open ; Mr. 

 Swainson does not enumerate the perforations of the spe- 

 cimen he described, but in comparing it with the H. 

 Craclwrodii he sufficiently explains that they are " half as 

 large and doubly numerous." 



The distinction above noted between the H. Craeherodii 

 and Californierisis, appears to have escaped the critical 

 attention of M. Deshayes ; the sheU described by him, 

 first, as the H. glabra, after Schubert and Wagner, and 

 secondly, as the H. Californienms, is the H. Craeherodii, 

 which, though commonly of similar dimensions, is often 

 much larger. The marked diff'erence in the arrangement 

 and number of the perforations in these two CaUfomian 

 species is certainly important; it is not a character of 

 the genus to present so great a variation in different indi- 

 viduals of the same species. 



Species 27. (Mus. Cuming.) 



Haliotis n.i;vosa. — For description and further illustra- 

 tion of this extremely variable species see Plate IX. 



May, 1846. 



