iqi6.] S. Kemp : Notes on Crustacea Decapoda. 401 



not marked correspondingly. The inferior portions of the sixth 

 somite were tinged with blue and there were pale pink chroraato- 

 phores on the hook-like process on the third somite. The outer 

 maxillipede was dark red, the first legs tinged with red and the 

 remainder transparent. 



Not infrequently specimens of a uniform bright green colour 

 were met with. In these the rostral setae were also bright red, 

 but the eye-spots were merel}' of a darker green surrounded by 

 narrow bands of black and white. In the weed among which 

 it is found T. armatum is very inconspicuous, extending its body 

 almost perfectly straight and holding tightly to the stem. 



-^%- Mandapam, Ramnad Dist., J. Hornell. One. 



S. India, 3 fms. 

 -^- Port Blair, Andamans, S. Kemp. Nineteen. 



2-5 fins. 

 5|-g- Burma coast, 8 fms. ' Investigator.' One, larval. 



Balss {loc. cit. supra) has recently recorded this species from 

 Japan, thereby making a considerable increase in its known geo- 

 graphical range. 



Genus Gelastocaris, Kemp. 

 Gelastocaris paronac (Nobili). 



1914. Gelastocaris paro)iae, Kemp, Rec. Ind. M/is.. X, p. 107, pi. v, 

 figs. I-I I. 



An additional specimen of this curious species was obtained at 

 Port Blair. It was dredged in 5 fathoms of water along with the 

 sponge Petrosia testudinaria, Lamarck.' When alive the indivi- 

 dual was remarkable for its strangely depressed form, the carapace 

 and abdomen being so much flattened that it resembled an Isopod 

 of the genus Idotea. In colour the specimen was pale pink through- 

 out with a speckling of darker pink chromatophores on the anten- 

 nal scale and tail-fan and at the sides of the carapace and abdo- 

 men. The Petrosia was of a similar pink shade and the coloura- 

 tion is doubtless protective. 



The specimen is a male, about 10 mm. in length, and, except 

 for the thickened outer antennular flagellum, differs little from the 

 two females previously recorded; in lateral view, however, the 

 carapace is less strongly arched anteriorly. 



~fo^ Port Blair, Andamans, 5 fms. S. Kemp. One. 



Genus Hippolysmata, Stimpson. 



1914. Hippolysmata, Kemp, Rec. Iiid. Mas., X, p. 112. 



1915. ExJiippolysmata, Stebbing, Ann. S. African Mtis., XV, p. 94. 



Stebbing has recently proposed to separate Hippolysmata 

 ensirostris, along with a closely allied S. African form, as a distinct 

 genus under the name Exhippolysmata. The characters employed 



1 I am indebted to Dr. Annandale for this determination. Mr. Southwell 

 informs me that the specimen from the Ceylon Pearl banks, recorded in the paper 

 cited abo\e, was also found on this sponge. 



