TATTERS ALL— MYSID ACE A AND EUPHAUSIACEA 121 



There are six teeth, including the terminal one, on the outer margin of the antennal 

 scale while the structure and armature of the telson agree exactly with the type. Having 

 but one specimen from the Indian Ocean, I am unable to decide whether the small points 

 of difference, noted above, are constant and thus deserving of varietal or even specific 

 rank. The species has never before been recorded from the Indian Ocean but to judge 

 from Ortmann's paper (1906) it has a very wide geographical distribution, practically 

 world-wide in temperate and tropical seas. The localities given by Sars in his Challenger 

 report and by Stebbing (1902), to the south of Cape Town, are the nearest to the Saya 

 de Malha Banks at which the species has been captured. It should be mentioned that 

 the present specimen has the ventral armature of the pleon, recently described by me 

 (1909) for Mediterranean specimens. Hansen (1910) has confirmed my observations on 

 a new species of the genus, L. intermedia, captured by the Sihoga expedition in the 

 waters round the Netherland East Indies. Lophogaster was the only bottom-haunting 

 Schizopod captured by the Sealark. 



Genus Gnathophausia, Will.-Suhm. 



2. Gnathophausia calcarata, G. O. Sars. 



G. calcarata, G. O. Sars, 1883. 

 G. calcarata, G. O. Sars, 1885. 

 G. hengalensis, Wood-Mason, 1891. 

 G. calcarata, Ortmann, 1906. 



Station. N., near the Chagos Archipelago, — 600 fms., one, 2(5 mm. from the eye 

 to the apex of the telson. 



The epimeral plate of the sixth segment of the pleon agrees in form with that figured 

 by Ortmann (1906), pi. I., fig. 2a, for a specimen 42 mm. long. The rostrum measures 

 12 mm. from the level of the eyes to its apex. The postero-lateral spines of the carapace 

 extend to the middle of the telson and the posterior median dorsal spine to the third 

 segment of the pleon. The specimen is the smallest yet recorded for the species. 

 G. calcarata is a widely distributed form in the Pacific Ocean but the present record is 

 the most westerly one known for that ocean. 



Family Eucopiidae. 

 Genus EucoPiA, Dana. 



3. Eucopia unguiculata (Will.-Suhm). 



Chalaraspis unguiculata, Will.-Suhm, 1875. 

 Eucopia australis (pars), G. 0. Sars, 1885. 

 Eucopia unguiculata, Hansen, 1905 (2). 

 Eucopia unguiculata, Hansen, 1910. 

 Station. N., near the Chagos Archipelago, — 600 fms., one, 20 nun. 

 I am not aware that this species has ever before been recorded from the Indian 

 Ocean though known from the East Indian Archipelago and off the coasts of California. 

 It is widely distributed in the Atlantic. 



SECOND SERIES— ZOOLOGY, VOL. XV. 16 



