MARINE MOLLUSCA. 619 
276. Emarginula planulata, A. Adams, 34, X//. VIII. 
A single specimen apparently inseparable from this species. 
Family CHITONIDAE, 
277. Chiton (Sclerochiton) miles, Carpenter, 34, X/V. I. 
Torres Straits is the only locality previously known for this Chiton. 
278. Schizochiton incisus, Sowerby, 34, X/V. I. 
This I believe is the first record of the occurrence of this remarkable species in the Indian Ocean, 
Family ISCHNOCHITONIDAE. 
279. Callochiton platessa, Gould, 34,X/V. V. 
280. Ischnochiton hululensis, n. sp. (Pl. XXXVI. figs. 3—6). IX. 
Testa ovata, mediocriter elata, roseo-albida, punctis roseo-griseis numerosis ornata, cingulo minute 
squamulato, albido viridi-griseo maculato, circumdata; valvae undique minute decussatae, antica 
transversim corrugata, lamina inserta brevi, fissuris novem instructa, medianae areis lateralibus bene 
circumscriptis, elatis, transversim corrugatis, postica mucrone centrali instructa, dimidio posteriori 
convexo, anteriore concavo et corrugato, lamina inserta fissuris undecim parata; squamae cinguli 
minutae, acute ovales, transversim striatae. 
Longit. 13 mm., diam. 19. 
The single specimen obtained is of a pale pinkish colour down the sides of the valves and 
whitish flecked and spotted with greenish grey down the middle. The hinder almost straight edge 
of the valves is pale with a few greenish grey spots and a dash of the same colour occurs along 
the sides in front of the lateral areas. The girdle is covered with alternate patches of greyish 
green and white scales. The insertion-plates of median valves have a single slit, that of the front 
valve has nine slits and that of the tail-valve eleven. 
281. Ischnochiton feliduensis, n. sp. (Pl. XXXVI. figs. 11—14). VII. 
Testa ovata, mediocriter elata, in medio carinata, pallida, sordide alba; valvae tenuissimae, 
antica et areae laterales valvarum centralium minute granulatae; areae centrales longitudinaliter 
grano-liratae ; valva anterior semicircularis, postice in medio sinuata; mucro valvae posterioris ante- 
medianus, parum prominens; cingulum album, squamis minutis striatis ornatum. Longit. 6 mm., 
diam. 4mm. 
Remarkable for the thinness of the valves, the flatness of the lateral areas, and its style of 
sculpture. The posterior valve has twelve slits in the insertion plate, the anterior has nine and 
the intermediate valves one. 
282. Ischnochiton maldivensis, n. sp. (Pl. XXXVI. figs. 7—10). VII. 
Testa elongato-ovata, elata, convexa, in medio subcarinata, pallida, plus minus rufescens, albo 
minute punctata, cingulo minute squamulato griseo maculato circumdata; valva antica et areae 
laterales laeves, areae centrales sulcis paucis longitudinalibus utrinque sculptis, valya posterior in 
medio mucronata; squamae cinguli minutae, adamantiformes, indistincte striatae. 
Longit. 8mm., diam. 4. 
The salient features of this species are the smoothness of the head-valve and the lateral areas, 
and the distinct imcised lines upon the sides of the central areas, a space down the middle. of 
