CRUSTACEA MALACOSTRACA. III. 



233 



EXPLANATION OF THE PLATES. 1 



Plate I. 



Fig. 1. Ianira maculosa Leach. 

 Fig. 1 a. Head of an ovigerous female from about 100 fathoms at the Fseroes, from above; x 13. 

 Length of the animal 3-9 mm. 



— ib. Abdomen of the same female from the Fseroes, from above; x 13. 



1 c. Head of a female with marsupium from the "Ingolf" Stat. 9 (295 fathoms), from above; x 

 13. Length of the animal 7-4 mm. 



— id. Head of a female with marsupium from Lat. 62°n' N., Long. I9°36' W., 1010— 1140 fath., 



from above; x 13. Length of the animal 6-5 mm. 



— 1 e. Abdomen of the last-named specimen, from above; x 13. 



— if. Distal part of the median lamella of the abdominal operculum of a male from Lat. 62°n'N., 



Long. i9°36' W., 1010 — 1140 fath., from below; x 38. 



Fig. 2. Ianira alta Stimpson. 

 Fig. 2 a. Anterior part of the body of a female from the "Ingolf Stat. 96, from above; x 10. 



— 2 b. Posterior part of the body of the same female, from above; x 10. 



— 2 c. Right lateral and posterior margin of the abdomen shown in fig. 2 b, from above; x 35. 



— 2d. Distal port of the median lamella of the abdominal operculum of a male from the "Ingolf 



Stat. 96, from below ; x 34. 



Fig. 3. Ianira tricornis Kroyer. 

 Fig. 3 a. Posterior part of the body of a female without marsupium from Ameralik (near Godthaab), 

 from above; x 10. 



— 3 b. Right lateral and posterior margin of the abdomen shown in fig. 3 a, from above; x 35. 



Fig. 4. Ianira pulchra n. sp. 

 Fig. 4 a. Female with marsupium from the "Ingolf Stat. 95, from above; x 20 / 3 . 



— 4b. Left mandible of a female from the "Ingolf Stat. 95, from below; x 26. 



— 4 c. Left maxillula of the same specimen, from below; x 26. /. first joint; 2. second joint; j. 



third joint; I 1 , lobe from first joint, & lobe from third joint. 



— 4 d. Left maxilla of the same specimen, from below; x 26. /. first joint; 2. second joint; j. third 



joint; I 2 , lobe from second joint; h. deeply cleft lobe from third joint. 



— 4 c Left maxilliped of the same specimen, from below; x 26. a. the real first joint, the prcrcoxa* 



which generally seems to have disappeared in the maxillipeds of the order Isopoda, but is 

 easy to point out in the present form. 

 1 By a regrettable mistake the plates have been marked III. 4 in the superscription to the left instead of III. 5. 



The Ingolf-Expedition. III. j. 3° 



