CUM ACE A— CALM AN. 145 



it. In stating that the adult is known only by the unique type-specimen, however, 

 Kemp (1913, p. 130) has overlooked Hansen's additional records (1895, p. 83). 



11. Odontodactylus, sp. \_Odonterichthus, sp.]. 



Occurrence. — Station 49. South Atlantic, off Brazilian coast. Surface-plankton. 

 Two specimens. 



Remarks. — The specimens, which measure about 14' mm. in total length, resemble 

 a larva of 28 mm. length from the Canaries, figured by Glaus (1872, p. 139, pi. v, 

 fig. 21a), but differ from it in having a short " zoea-spine " on the hinder margin of 

 the carapace, and in the very much shorter lateral and intermediate teeth of the telson. 

 This larva, regarded by Claus as belonging to the genus Gonodactylus, is stated by 

 Hansen (1895, p. 90) to be an Odonterichthus (larva of Odontodactylus). Somewhat 

 similar larvae (possessing a zoea-spine) are figured by Brooks (1886, pi. xv, figs. 1, 5, 

 11) from Celebes and the West Pacific. 



CUMACEA. 



I.— INTRODUCTION. 



The Cumacea brought back by the " Terra Nova " Expedition are few in number. 

 From the Antarctic region only two species were procured, each represented by a 

 solitary specimen. A considerable number of specimens belonging to nine species (two 

 of which are described as new) were obtained in three plankton-gatherings from Spirits 

 Bay in the extreme north of New Zealand. In the remainder of the collections no 

 Cumacea have been detected. 



A comparison with the results obtained by the German and the Swedish Antarctic 

 expeditions might suggest that the Ross Sea area was relatively poor in species of 

 Cumacea. It is probable, however, that the deficiency is more apparent than real, and 

 is due to the fact that the two British expeditions to that area devoted less attention 

 than the others to the special methods of collecting necessary for obtaining the more 

 minute bottom-living Crustacea. 



Of the Antarctic species, Camjjylaspis antarctica was obtained by the "Discovery" 

 in the same region (McMurdo Sound), and by the "Gauss" at Wilhelm Land, while 

 Cyclaspis gigas, described from the last-named locality, is now found to have a 

 similarly extended range. 



All the species from Spirits Bay (with the exception of a species of Campylaspis 

 left for the present undetermined) are either identified with, or described as closely 

 allied to, species already known only from New Zealand. It is worthy of note that 

 the three plankton-gatherings in which they occurred were taken during the night, 

 since it has already been observed that Cumacea commonly choose the hours of 

 darkness for their excursions from the sea-bottom, 



