KXPI.ANATION OF PLATES XVIII AND XIX. 



Fig. I. — Tympanomerus stapletoni, sp. nov., adult male, x 3; 

 la front viewed from above ; 16 buccal frame and 

 external maxillipeds ; ic lateral view of the antero- 

 lateral margin of the carapace ; id abdomen ; le outer 

 view of the chela ; figs, la — e all taken from the adult 

 male and all x 6. 



,, 2. — Pachygrapsus propinguus , sp. nov., female, x 3 ; 2a external 

 maxilliped of this female, x 6 ; 26 three last segments 

 of the abdomen of the male, x 6 ; 2c chela and carpus 

 of the right chelipede of the female, x 6. 



,, 3. — Leander, sp., telson,x25 ; ?>'^> 3^ ^^^ 3^ l^gs of the first, 

 of the second and of the fifth pair, each x I2-|. 



,, 4. — PalcBmon {EupalcBmon) lamarrei, H. M. Edw,, carapace 

 and rostrum of the largest specimen from Port Can- 

 ning X 3 ; 4a extremity of the rostrum of this specimen 

 ;v. X25; 46 carapace and rostrum of a younger speci- 



men from Calcutta, x 3 ; 4c lateral view of the sixth 

 abdominal somite and telson of the largest specimen 

 from Port Canning, x 5 ; 4^ telson of a younger speci- 

 men from Calcutta, x 10 ; 4^ leg of the second pair of 

 the largest specimen from Port Canning, x 10 (the 

 chela being placed somewhat obliquely) ; 4/ chela of 

 this leg, X 17. 



,, 5- — Sixth abdominal somite and telson of a young specimen, 

 long 70 mm. (rostrum included) of Pal. [Eupalcemon) 

 carcinus, Fabr., from the river Kutei, Borneo x 5 ; 5« 

 telson of another young specimen, 75 mm. long, from 

 the same river, x 5. 



,, 6. — Caridina propinqua, sp. nov., anterior part of carapace, 

 antennular and antennal peduncles, x 12 ; 6a telson, 

 X 12 ; 6h extremit}" of telson, X50 ; 6c leg of ist pair, 

 X 25 ; 6^ leg of second pair, x 17 ; 6e chela of this leg, 

 X 25 ; 6/ dactylus of third leg, x 50 ; all the figures 

 are taken from the largest specimen, except figs. 

 da and 6& which are from the specimen the rostrum 

 of which is broken off. 



,, 7. — Caridina Icevis, Heller, from Java, leg of the second pair, x 

 17 ; ya chela of this leg, X 25. 



