100 POLYPLACOPHOKA. 



with two parallel series of strong tubercles, radially arranged, the 

 inner series hardly noticeable in the posterior valve ; lateral areas 

 of the intermediate and posterior valves bordered with a single series 

 of similar tubercles; central areas longitudinally impressed-sulcate 

 on each side; the entire surface of valves most minutely asperulate. 

 Girdle scaly, grayish, maculated with greenish-ashen. 



Length 6i, breadth 3* mill. (Sow.) 



Island of Art t New Caledonian Archipelago. 



Chiton tuberculosus Souv., Journ. de Conch. 1866, p. 251, t. 9, 

 f. 3. 



Described from one specimen, which is in the Bordeaux Museum. 

 Its generic characters are not known. 



LEPIPOPLEURUS NOEMIJG Rochebr. Shell ovate elliptical, 

 obtusely carinated, whitish, with wide ochraceous spots everywhere. 

 Anterior valve, lateral areas of intermediate valves and posterior 

 area of posterior valve, circularly, deeply waved, and ornamented 

 with regularly placed bead-like tubercles; central areas smooth. 

 Marginal ligament rather narrow, whitish, marked with distant 

 square red spots. Length 17, breadth 10 mill. New Caledonia,^. 

 Belligny. (Rochebr. in Bull. Soc. Philom. 1883-'84, p. 38). 



GYMNOPLAX LUDOVICI^E Rochebr. Shell ovate, carinated, a little 

 obtuse ; greenish variegated with white and blue spots. Anterior 

 valve and posterior area of posterior valve radially tuberculate, the 

 tubercles flattened. Intermediate valves having the lateral areas 

 imbricately sulcate and bordered by a beaded line; central areas 

 most minutely striated. Marginal ligament rather wide, shining 

 olivaceous. Length 24, width 17 mill. New Caledonia. Rare. 

 Mus. Paris. (Rochebr. in Bull. Soc. Philom. 1883-'84, p. 38). 



GYMNOPLAX ALPHONSIN^E Rochebr. Shell ovate-elliptical, car- 

 inated, very pale green. Anterior valve and posterior area of the 

 posterior valve radially costate, the ribs unequal, somewhat beaded. 

 Intermediate valves having the lateral areas 5-ribbed, the ribs wide, 

 the outer much roughened at the margin. Central areas sulcate, 

 smooth at the apices. Marginal ligament narrow, margaritaceous. 

 Length 28, breadth 15 mill. New Caledonia (Belligny). Rare. 

 Mus. Paris. (Rochebr. in Bull. Soc. Philom. 1883-'84, p. 38). 



GYMNOPLAX RHYNCHOTUS Rochebr. Shell elongated, intensely 

 carinated, pale rose color. Valves rostrate at the apices ; anterior 



