14 AMPHINEURA. [Polyplacophora. 



3. Callochiton puniceus, Gould, 1846. Plate 3, fig. 8, a-c. 



Chiton puniceus, Gould, P. Bost, S.N.H., ii, 1846. 143 ; U.S. Expl. Ex., xii, 

 1852, 324, f. 412. Ischnochiton puniceus, Couthouy : Pilsbry, Man. 

 Conch. (1), xiv, 81, pi. 8, f. 76, 77. Callochiton (Icoplax) puniceus, Gould, 

 " Deutsche Siidpolar Expedition " ; Thiele, " Die antarktischen und 

 subantarktischen Chitonen," 1908, 14. Chiton illuminatus, Reeve, 

 Conch. Icon., iv, 1847, pi. 22, f. 147. Callochiton illuminatus, Reeve, 

 Man. Conch. (1), xiv, 51, pi. 9, f. 92-94; Suter, P. Mai. S., ii, 185, vii, 

 294 ; Melville and Standen, Scottish Antarct. Exp., Moll., 126. Chiton 

 dimorphus, Rochebrune, Miss. Cap Horn, Moll., 142, pi. 9, f. 10. 



Shell oval, rather elevated, granulose, central areas with longi- 

 tudinal threads, colour red or green. Anterior valve granulose, no 

 radiate sculpture, numerous small black eyes. Intermediate valves 

 wrinkle striate and granulose all over, the jugum acute, central areas 

 with slender elevated separated threads, parallel to the jugum, 6-14 

 on each side ; lateral areas granulose, with 2 rows of eyes, no 

 radial sculpture. Posterior valve with numerous longitudinal threads 

 on the central area, posterior area minutely granulose and with a 

 fair number of eyes ; mucro a little in front of the middle, slightly 

 elevated. Girdle, with small elongate scales. Colour of type red, 

 New Zealand specimens sometimes greenish-grey ; girdle of the same 

 colour, often spotted with paler at the sutures. Interior roseate or 

 greenish, anterior valve with 15-16 slits, intermediate valves with 1 

 slit on each side, posterior valve with 11-14 slits ; teeth acute, quite 

 distant, scarcely propped ; eaves spongy ; sinus small, the sutural 

 plates connected across it. 



Length, 16 mm. ; breadth, 10 mm. Divergence, 120. 



Type, from Tierra del Fuego, in the U.S. National Museum, 

 Washington. Of C. illuminatus, from Straits of Magellan, the type 

 is in the British Museum. 



Hob. One specimen, dredged near Kapiti Island, in the Canter- 

 bury Museum ; another full-grown yellowish-red specimen from 

 18 fathoms, Port Pegasus, Stewart Island, is in Professor Chilton's 

 collection ; a young greyish-white specimen from 50 fathoms, near 

 the Snares Islands, is in my collection. The latter two specimens 

 were dredged by Captain Bollons. Common in the Magellan Province. 



Remarks. In having but 1 slit in the median insertion plates and 

 in the want of props on the teeth this species is abnormal ; in other 

 respects it agrees with Callochiton (Pilsbry). Thiele is of opinion that 

 the green specimen from Kapiti Island may prove to be a distinct 

 species. In many species of the Chitons the colour is not of specific 

 value. 



4. Callochiton sulculatus, Suter, 1907. Plate 3, fig. 9. 



Callochiton sulculatus, Suter, P. Mai. S., vii, 294, f. 5 in text. 



Shell very small, oval, angularly raised, side slopes straight, central 

 areas laterally grooved, colour light fulvous. Anterior valve with a 



