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REPORT ON THE CRUSTACEA 



By W. F. LANCHESTER, M.A. 



ASSISTANT LECTURER AND DEMONSTRATOR IN ZOOLOGY AT UNIVERSITY COLLEGE, DUNDEE 



THE collection is small and, though supplying representatives of many of 

 the great groups of Crustacea, presents in consequence few points of 

 interest. One new and characteristic species of Potamon is described, 

 and attention may be drawn to the curious association of the young of 

 Neptunus pelagicus with a Rhizostoma. 



1. Doclea gracilipes, Stimpson 

 Alcock, Journ. As. Soc. Bengal, vol. lxiv, pt. 2, p. 229 (1895). 



1 $ , 4 9 's. Patani Bay. 



2. Naxia hystrix, Miers 

 Chall. Brachyura, p. 61 (1886). 



Patani Bay. 



The tips of the rostrum in this female example are broken off, but I have 

 little doubt that my identification is correct. The spines generally are some- 

 what less sharp than in the typical form. 



3. Hyastenus planasius, Ad. and White 



Alcock, J.A.S.B., vol. lxiv, pt. 2, p. 212 (1895). 



1 small $ . i\ miles E.S.E. of Cape Patani. 10 fath. 

 ' Hard clayey mud, with many dead shells.' 



4. Neptunus pelagicus, Linn. 

 Alcock, J.A.S.B., vol. lxviii, pt. 2, p. 34 (1899). 



1 9 . Patani Bay. 



Much damaged. 



1 $ . Jambu River. 

 ' From ventral surface of large Rhizostomous medusa.' 



Several young. Estuary of Jambu River. 

 ' From ventral surface of various medusae.' 



