356 CRUSTACEA MALACOSTRACA. III. 



Fig. 2 m. Same m edian lamella of the male operculum, from the left ; x 22. 



2 n. Second left male pleopod, from above; x 22. It is seen that the copulatory organ terminates 



in an extremely long thread, /, /, which has been turned around the pleopod. 



Fig. 3. Pseudomunnopsis Beddardi Tattersall. 

 Fig. 33. Male, from above; scarcely x 9. 



3 b. Anterior half of a female, from above ; scarcely x 9. 



3 c. Left mandible of a female, from below; x 33. p. plate for the attachment of the musculus 

 adductor. 



3d. Left maxilla of the same female, from below; x 33. 



3 e. Left maxilliped of the same female, from below; x 24. 



3 f. Distal part of the maxilliped shown in fig. 3 e, from below ; x 56. 



3 g. First left thoracic leg of a female, from below ; x 23. 



3 h. Median lamella of the male abdominal operculum, from below; x 15. 



31. Distal part of the lamella shown in fig. 3h, from below; x 15. 



3 k. Second pair of male pleopods, fused and constituting a large plate with a somewhat deep 

 and narrow terminal incision, in which the copulatory organs are seen, from below; x 15. 



3 1. Distal part of the plate shown in fig. 3 k, exhibiting the median incision, one of the copu- 

 latory organs and one of the thick coupling hooks with the musculature visible through 

 the integument, from below; x 45. 



3 m. Posterior part of abdomen with anal doors and uropods of a male, from below ; x 32. 



Fig. 4. Cirolana borealis Lilljeborg. 



Fig. 43. Proximal half of first left pleopod, from in front; x "/ 2 - st. sternite; //. inner plate of first 

 joint, pracoxa, formed by the fusion in the median line of two chitinized pieces belonging 

 to both left and right pleopod; / o. outer chitinized plate of first joint near the outer margin 

 of the pleopod; 2. small chitinized plate representing second joint -- the remainder of that 

 joint membranous; j. third well-chitinized joint; en. endopod; ex. exopod. 



Fig. 5. Eurydice caeca n. sp. 

 Fig. 53. Male, from above; x 6. 



5b. Anterior part of the head, with right antennula and the proximal joints of left antennula 

 and both antennae, of the same male, from below; x 18. f. lamina frontalis; c. clypeus; /. 

 labrum. 



5 c. Distal half of left mandible, from above; x 53. c. condylus; m. molar process. Palp omitted. 



5d. Molar process of the same mandible, from below; x 135. 



5e. Right maxilliped, from above; x 83. /*. lobe from second joint. 



5 f. Second left thoracic leg, from behind ; x 20. 



5 g. Fifth left leg, from in front; x 20. 



5 h. Seventh left leg, from in front; x 20. 



5!. Posterior part of abdomen of the male shown in fig. 53, from above; x 2 5/ 2 . a. posterior 

 margin of the abdomen, more highly msgnified. 



