On a new Macrurous Crustacean. 59 



densely clothed with bright golden pubescence. The man- 

 dibles ferruginous at their tips ; their base covered with golden 

 pubescence ; the palpi pale ferruginous. The wings sub- 

 hyaline, the nervures pale ferruginous, the costal nervures 

 dark fuscous ; a narrow fuscous stain runs along the anterior 

 margin of the front pair, from the base of the first submarginal 

 cell to the apex of the wings ; the tegulse rufo-testaceous ; the 

 tibia? with golden pubescence outside ; the tarsi are pale golden, 

 inclining to silver ; the spines on the tibise and tarsi pale fer- 

 ruginous. Abdomen : the basal segment with a thin, pale 

 golden pile ; the apical margins of the four basal segments 

 with silvery fascia?. 

 Hab. Ega. 



[To be continued.] 



VII. — On Nephropsis Stewarti, a new Genus and Species of 

 Macrurous Crustaceans, dredged in deep water off the Eastern 

 Coast of the Andaman Islands. By James Wood-Mason*. 



In April of last year I was deputed by the Trustees of the 

 Indian Museum, with the sanction of the Government of India, 

 to proceed to the Andaman Islands for the purpose of making 

 a collection illustrative of the marine fauna of that part of the 

 sea of Bengal in which those islands are situated. I reached 

 Port Blair about the 6th of April, and immediately put myself 

 in communication with the Chief Commissioner, who at once 

 placed at my disposal a well-manned boat and a small steam- 

 launch, with which I dredged for nearly two months, with 

 much success, from low-water line down to near 50 fathoms. 

 Towards the end of my stay, General Stewart, knowing my 

 intense desire to try my fortune in deeper water, placed at 

 my disposal for one day the S.S. 'Undaunted,' which had been 

 recently armed and put into commission for service as a guard- 

 ship. The time allowed was short, but sufficiently long to 

 enable me to bring away samples of the life supported by the 

 sea-bed at and beyond the 100 fathoms' line, and to ascertain 

 that the sea-bed was uniformly covered with a thick deposit of 

 fine olive-coloured mud, derived from the waste of the coral- 

 reefs and of the sandstone and serpentine rocks of the islands f. 



* From the Journal of the Asiatic Society of Bengal, vol. xlii. part 2, 

 1873. A plate accompanies the original. 



t The following rough analysis by Mr. Tween, the chemist of the Geo- 

 logical Survey of India, will show the proportion of insoluble matter : — 



Soluble in H CI, mostly Ca C0 2 42-8 



Insoluble clay and sand 57 - 2 



1000 



