II \ > Illl' 



This is the only tropical Bpecief th:it I have met with, ami 



very ;ii>n.)i-in:il in \\< itumpy projecting teeth, re0embliog tbote of 

 Tnnif,-//ii. The girdle IB, however, normal, tin- extremely nil 



crowded granules present ini: :i s.me\\ hat hri.-t I \ . 

 the mirroseopi'. 



The above is taken from Carpenter's Jtfft Thety] oen is 



Miis. ( 'iiiiiin-, N<. !()/>. 



I. \>IM:IM>I: Carpenter, n. sp. I 'nfn/ured. 



Shell small, oval, depressed, the juirnni acute. Valves apicu- 

 late; ashen, maculated with darker. Mucro rather raided, the 

 posterior slope concave. Kntire surface under a l<-n- een ' 

 conspicuously j)iistulose ; central areas havinir ahout 7 suhparalle] 

 lines of small but projecting granules, bending toward tl:e jiiiruin, 

 closer on the jugal area. Lateral areas hardly elevated, ha 

 about 3 very distant and a little larger lines of granules; anterior 

 valve with about 18 such lines. 



Interior: anterior valve with 8, central valves 1, posterior valve 

 with 9 slits; teeth acute, long ; eaves conspicuous, short ; sinus nar- 

 row, deep, laminated but scarcely dentate. Girdle thickly beset 

 with most minute purple smooth scales (and occasionally corneous 

 hairs, perhaps foreign to it). 



Length 1H, breadth 7* mill. ; div. 140. 



Eaxt 



.' Trochydermon asperior Cm., MS. p. 19. 



The solitary specimen was found in a mixed group of species, 

 named C. pulcherrimus Sby., and Lept. craticulatus by Dr. (iould, 

 and coming from either Hong Kong or Hakodadi. It will be 

 easily recognized by its* sculpture and minutely chaffy s< ; 

 Whether it belongs to this genus or to C/urtopleura will probably 

 be decided by the gills. (Cpr.) 



I. PERORNATUS Carpenter, n. sp. Unfigured. 



Shell, small, subelongate, elevated; jugmn acute; ashen or olive 

 maculated; mucro slightly before the middle, planat.-. Central 

 areas with subparallel strong tuberculate bars, about H) mi each 

 side, interstices decussated; jtiLral urea granulate, sculptured in 

 front; lateral areas strongly defined, having rounded irregularly 

 radiating tubercles, of which there are around the margin of the 

 posterior valve about 20, the median valves f>, anterior val\> 



