Callochiton puniceus (Gould 1846)

“CHITON PUNICEUS, (COUTHOUY MS.) Testa parva, oblongoelliptica, elevata, ad dorsum carinata, punctatissima, punicea, gradibus ætatis conspicuis obtusis signata: areis lateralibus præ­ruptè elevatis, et sparsim granulatis; areis centralibus costulis longitudinalibus parallelis ad 6, plerumque ad medium dislocatis, clathratis; valvâ posteriori rostro parvulo acuto et septo transver­sali notato: ligamentum minutissimè imbricatum, adversum su­turas albido fasciatum. Long. ½, lat. 3/10 poll. Hab. Orange Harbor.

Very much resembles C. ruber, Lowe.”

(Gould, 1846: 143)

"ISCHNOCHITON ACELIDOTUS, new species.

Chiton whitish, of moderate size, with high but not keeled back, the entire surface except the lateral areas covered with a microscopic oblique reticulation; the girdle provided with densely set small spinules, whose distal ends appear at the surface to form a regular pavement of small lozenge-shaped scales; the gill rows advance to the

second valve; anterior valve smooth, except for the microscopic decussation, internally with 14 slits; posterior valve with the same number, the mucro in front of the center, the posterior tract sculptured like the anterior valve, the central area like the intermediate valves; the latter have a smooth space in the mucronate jugal area, the pleural tracts have six to eight widely spaced slender axial threads; the lateral areas incremental lines and extremely minute pustulation. Length, 14; width, 9; height, 5 mm.

Habitat.-Magellan Straits in 77½ fathoms, ooze, bottom temperature 46.9°, United States Fish Commission steamer Albatross. Cat. No. 122731, U.S.N.M."

(Dall, 1919: 506)

"? ISCHNOCHITON EXANTHEMATUS, new species.

Chiton of moderate size, of dark yellowish brown color, lighter on the jugum, the girdle covered with densely set short spinules whose ends form a minute tessellation on the surface; anterior valve less than semicircular, sculptured with concentric incremental lines and over the entire surface with very minute granular pustules; internally with about 18 slits, with very short smooth insertion plates and rather spongy eaves; the posterior valve has similar sculpture on the posterior area, the low mucro at the anterior fourth of the valve and the narrow central area merely transversely striated; internally there are 14 slits, the insertion plates faintly striated in part, the sutural laminae very narrow, the sinus hardly perceptible, the color white; intermediate valves hardly mucronate, the jugal area smooth except for microscopic punctations, the pleural tracts with seven or eight axial thread-like lines with wider interspaces, minutely punctate, on each side; the lateral areas feebly concentrically ribbed and granulose like the end valves; internally with one or two slits indifferently on the same valve, the sinus wide, very shallow and ill-defined, the sutural laminae narrow, arcuate. Length, 10; width, 7; height, 4 mm.

Habitat.-Straits of Magellan in 61 fathoms, sand, bottom temperature 48°, United States Fish Commission steamer Albatross. Cat. No. 96226, U.S.N.M."

(Dall, 1919: 505)