FEOM THE INLAND SEA OF JAPAN. 453 



Fig. 39. Spirontocaris propvgnatrix. Posterior half of abdomen, x 6. 



40. „ Extremity of telsoii, X 50. 



41. J, Extremity of left antennal scale, x 10, without the setae. 



42. Spirontocaris alcimede, de Man. x 3. One of the specimens in whicli a pterygostomian 



spinule occurs. 



a 



43. „ Rostrum of another specimen, which is g toothed, X 6. (The rostrum of this figure 



should point upward.) 



44. „ Posterior half of the abdomen of the same individual, X 6. 



45. „ Eye-peduncles and both pairs of antennse of the same specimen, x 6. 



46. „ Leg of the second pair of the same specimen, X 10. 



47. Spirontocaris jmndaloides, Stimpson. Cephalothorax, rostrum, and antennal scale of an adult 



specimen, x 3. 



48. „ Leg of the second pair of another individual, x 10. 



Plate 33. 



Fig. 49. Hippolysmata vittata, Stimpson. Cephalothorax, antennulse, and antennae of an egg-bearing 



female, x 3. 

 50. ,, Terminal part of the abdomen of the same female, x 3. 

 51 & 52. Alpheus h'evirostris (Olivier). Chelae of the smaller cheliped in the two egg-bearing 



females, viewed from the outer side, x 3. 



53. Alpheus japonicus, Miers. Chela and carpus of the smaller cheliped of one of the two 



males, viewed from the upper or inner side, x 2. 



54. Penaus {Metapen<sus) akayebi, Rathbun. Stridulating-organ of the female, on the right side 



of the carapace, X 17. 



55. Penmis (Metapenaus) accliois, Rathbun. Thelycum, viewed from outer side, x 5. 



56. Penaus [Trachyjienoeus) curvirostris, Stimpson. Thelycum, x 5. 



57. „ First segment of the abdomen, lateral view, presenting the fissure near the lower 



margin, x 3. 



58. „ Telson of the same female, x 5. 



59. Potamon [Parathdphusa) endymion, de Man. Egg-bearing female from the lake at 



Yunnan-Fu, China, x 2. 



60. „ Anterior part of the cephalothorax, x 3. 



61. „ Lower side of the anterior part of the cephalothorax, x 3. 



62. ,, External maxillipeds of the same female, X 3. 



63. „ Right (larger) chela of the same female, x 3. 



6i. Potamon {Parathelphusa) lanzi, Doflein, typical male specimen from the lower Han River, 

 China (belonging to the Museum of Munich), external maxilliped, x 3. 



65. „ Larger (right) chela of the same male, outer side, x 2. 



66. Paloemon {^Parapalamon ?) henderaoni, de Man, anterior part of the cephalothorax of the largest 



specimen from Darjeeling, in which an hepatic spine is wanting, x 3. 



67. „ Telson of the same specimen, x 3. 



68. „ Left leg of the second pair of the same specimen, x 3. 



69. Penceus (Penaus) latisulcatus, Kishinouye, var. ? Thelycum, viewed from the outer side, x 6. 



