142 M. A.-E. Malard on the Influence of Lljlit on 



anal tergite scarcely covering the valves, which have their 

 borders prominent and deeply compressed ; sternite large and 

 angular. 



Legs long and slender. 



Number of segments 55. 



Length about 70 millim., width bo. 



Loc. Ki Dulau (Ki Islands). 



This species, of which a single female specimen was 

 obtained, in colouring resembles Sp. sanguineus of C- Koch 

 (Die Myriop. i. p. 16, fig. 15). It, however, at least differs 

 in its long legs and antennae and prominent anal valves. 



EXPLANATION OF PLATE IX. 



Fig. 1. Stronc/ylosoma Gervaisii (Lvlchs). Dorsal view, X 1|. In this 

 figure the anterior angles of the keels are too squared and the 

 legs are wrongly placed and wrong in number. 



Fig. 1 a. Ditto. Left copulatory foot from below. 



Fig. 2. Strong yloso7na Guerinii, Gerv. Left copulatory foot from 

 below. 



Fig. 3. Stenonia tuberosa, sp. n. Keel of the twelfth segment from 

 above. 



Fig. 3 a. Ditto. Anal segment from above. 



Fig. 3 b. Ditto. Copulatory foot from below. 



Fig. 4. lulus solitarius, sp. n. Anal segment from the side. 



Fig. 5. lulus tristatti, sp. n. Anal segment from the side. 



Fig. 5 a. Ditto. Part of segment to show position of pore. 



Ftg. 6. Spirostreptus Moseleyi, sp. n. Lateral view of head and collum, X . 



Fig. 6 a. Ditto. Lateral view of anal segment. 



Fig. 7. Acanthiulus Murrayi, sp. n. Lateral view of anterior end of 

 body, X. 



Fig. 7 a. Ditto. Lateral view of two of the middle segments. 



Fig. 7 b. Ditto. Lateral view of posterior end of body. 



Fig. 8. Spirobolus dorsalis (Le Guillou). Lateral view of head, X. 



Fig. 9. Spirobolus digrammus, sp. n. Lateral view of head and collum, X . 



Fig. 9 a. Ditto. Lateral view of anal segment, x . 



Fig. 9 b. Ditto. Anterior view of copulatory feet. 



Fig. 10. Spirobolus challetigeri, s]).n. Lateral view of head and collum, X. 



Fit/. 10 a. Ditto. Lateral view of anal somite, X . 



Fig.'iOb. Ditto. Third leg of male. 



Fig. 10 c. Ditto. Anterior view of copulatory feet. 



Fig. 11. Spirobolus Jlavo-colla7'is, s]^. n. Lateral view of anal segment, X . 



Fig. 11 a. Ditto. Anterior view of copulatory feet. 



Fig. 12. Spirobolus hcemorrhantus, sp. n. Lateral view of head and 

 collum, X . 



Fig. 12 a. Ditto. Lateral view of anal segment, X . 



XVI T. — The Influence of Light on the Coloration of 

 Crustaceans. By A.-E. Malard *. 



M. Martin has recently drawn the attention of our Society 

 to a peculiar case of albinism which he had studied in a lobster 



* Translated from the ' Bulletin de la Soci^te Philomathique de Paris,' 

 gieme g^j-ie, t. iv. uo. 1 (Pariy, 18'J2), pp. 24-30. 



