iot> Records of the Indian Museum. [Vol. X, 



No arthrobranchs or epipods at base of peraeopods. Carpus of 

 second peraeopods composed of three segments. 



Tozeuma armatum, Paulson. 



1875. Tozeuma armatum, Paulson, Red Sea Crustacea, Kiew, p. cjy, pi. 



XV, figs. 2, a-o. 

 1893. Angasia sfimpsoni, Henderson, Trans. Linn. Soc, Zool., \', p. 437, 



pi. xl, figs. 18-20. 

 1906. Angasia armata, Nobili, Ann. Sci. nat. Zool., Paris (9), 1\', p. 42. 



The specimens agree well with the published descriptions and 

 figures. In two perfect individuals there are respectively twenty 

 and twenty-four teeth on the inferior margin of the rostrum. 

 Of the segments composing the carpus of the second peraeopods 

 the first is the longest and the second the shortest, the third being 

 only a little longer than the second. The dactyli of the last three 

 pairs of legs bear several spines much as in Paulson's figure, but 

 in an ovigerous female only two are found in this position. 



All the examples bear a sharp inferior spine on either side of 

 the sixth abdominal somite near its distal end. The lateral spine 

 on the posterior edge of the fifth somite is present in all the 

 specimens and in one individual there is a second large spine on 

 this margin placed lower down : the difference is not correlated 

 with sex. 



The only male individual is badly damaged, but in the 

 proportions of the upper antennular liagellum does not diff'er from 

 the female. 



^~^^- Off Cinque I., Andamans, ' Investigator.' One, imperfect. 



36 fms. 

 -y^- S. E. of Ceylon ; 6° 2' 30" X., ' Investigator.' Three, the largest 



81° 29' E., 52-68 fms. an ovigerous fe- 



male, 77 mm. 



Tozeuma armatum has been recorded from the Gulf of Martaban, 

 Burma (Henderson) and from the Red Sea (Paulson and Nobili). 



Genus Gelastocaris, nov. 



Carapace without supra orbital spine and withoitt spine or 

 spinules on antero-lateral margin. Post-orbital and antennal spines 

 present, the latter strong and flanked by a well-marked carina. 

 Rostrum triangular in dorsal viev/, forming eaves which conceal 

 the eyestalks. Basal segment of antennule terminating in an 

 upstanding process which protects the eyes anteriorly ; its lateral 

 process large and subquadrate. Upper antennular flagellum 

 uniramous. Outer margin of antennal scale furnished with 

 spinules. Mandible without incisor-process or palp. Third 

 maxillipede without exopod. Carpus and chela of first peraeopods 

 elongate ; chela smaller than that of second peraeopods and 

 furnished with peculiar interlocking spines at apex Carpus of 

 second peraeopods composed of three segments. Dactylus of last 



