PLATE IX. 



Fig. 29«. Pracliypenaeus salaco de Man, petasma of the male, long 42 mm. from Stat. 205, viewed from 



behind, X 10; 29/» distal part of this petasma, viewed from the left side, y 10 ; the convex 



anterior surface is situated at the left hand of the figure; 29c the same petasma looked at 



from above, X 10, v. being the posterior side of the organ. 

 Fig. 30. Parapenaeopsis venusta de Man, larger female from Stat. 273, x 3 ; 30« anterior part of the 



carapace of the other female, - 6; 30^ telson of the larger female, ■ 6; 30c thelycum of the 



larger female, ;■' 12. 

 Fig. 3i«. Penaeus semisalcatus de Haan, petasma of the male, long 175 mm., from Stat. 213, looked at 



from behind, < 4; 31^ flagella of the right antennule of the same specimen, viewed from 



above, X 2. 

 Fig. 32(7, 32^. Penaeus indicus H. M. Edw., var. longirostris de Man, left leg of the first respectively 



second pair of the largest female, long 165 mm., from Stat. 213, looked at from the outer 



side, X 2. 

 Fig. 33<?. Penaeus merguiensis de Man, carapace of a young female, long 92 mm., from Stat. 47, ;• 2, in 



which the foremost tooth of the upper margin appears distinctly situated before the third 



joint of the antennular peduncle; 33^ and 33c left leg of the first and of the second pair of 



an adult female from Makassar, looked at from the outer side, ■■■ 2. 

 Fig. 34«. Penaeus canaliculatus Oliv., thelycum of the adult female, long 137 mm., from Stat. 133, x 6; 



34<5 thelycum of the young female, long 60 mm., from the same Station, < 6. 

 Fig. 35«. Penaeus latisuleatus Kish., thelycum of the amiost adult female, long 135 mm., from Japan, X 5; 



this female, which is preserved in the Museum at Göttingen, was erroneously referred by 



W. Hess -to Penaeus plebejus Hess. 

 Fig. 35#. Thelycum of a young female, long 1 10 mm., from Djeddah, 10. This female, which is preserved 



in the Leyden Museum, and which in 1880 was referred by me to Penaeus canaliculatus Oliv., 



does apparently also belong to Penaeus latisuleatus Kish. 

 Fig. },6a. Penaeus plebejus Hess, thelycum of the type of this species from Sydney, nearly 15 cm. long, 



and preserved in the Museum at Göttingen, 5; 36$ anterior prominence of this thelycum 



looked at from before, X 5. 

 Fig. 37. Sicyonia benthophila de Man, the female from Stat. 253, type, X 5; the third legs are wanting 



and the very fine setae with which the carapace is covered, have not been figured ; 37^ anterior 



part of the carapace with the eye and the styloccrite, •; 17; 37^ the cordiform plate of the 



thelycum, at either side of which one observes the coxae of the fourth pair of legs, X 17; 



37c — e the legs of the first, fourth and fifth pair, X 10. 

 Fig. 38. Sicyonia fallax de Man, female from Stat. 105, X 2; 38a upper side of the carapace and the 



rostrum, X 5 ; 38^ sixth and fifth abdominal somite, with a part of the fourth, X 5 ; 38c 



thelycum, X 10. 



