44 



DISCOVERY REPORTS 



Tattersall. The arrangement of the spinules arming the apex of the telson is somewhat irregular and 

 asymmetrical. There is no prolongation of the apex between the two very long apical spines and the 

 almost straight posterior margin bears six small, evenly spaced spinules with five tiny spinules inter- 

 spersed irregularly among them (Fig. 3 J-K). The sub-apical spines of the telson are much smaller and 

 more slender than those figured by Illig. In spite of these small differences, I somewhat dubiously 

 refer the Discovery specimen to L. rotundatus. 



Fig. 3. Lophogaster schmidti Fage (A-F). A, antennular peduncle of immature female; B, right antenna; C, fourth thoracic 

 appendage of immature female with oostegite; D, eighth thoracic appendage of immature female with oostegite; E, telson and 

 right uropod in dorsal view. All x 16. F, distal end of telson (enlarged). 



Lophogaster rotundatus Illig (G-K). G, antennular peduncle of immature male; H, left antenna; J, telson and left uropod in 

 dorsal view. All x 16. K, distal end of telson (enlarged). 



Distribution. This species has only been recorded on three occasions before the present record. 

 All of these were from tropical waters of the western Indian Ocean and in each the captures were made 

 at the bottom in depths between 263 m. and 463 m. The present record considerably extends both its 

 horizontal and vertical range. Fage has suggested that temperature is the limiting factor in its distri- 

 bution but, if I am right in referring the present specimen to rotundatus, the fact that it was taken in 



