EXPEDITION ANTARCTIQUE BELGE 



Abdomen elliptical, almost pointed anteriorly. Notogaster slightly arched ; chitin thin, 

 ît is apt to collapse in spirit or reagents ; there are not any markings. There is a sparse 

 row of slightly clavate hairs round the periphery. Dorsal plate folded over a good deal on 

 to the latero-posterior ventral surface ; causing the ventral plate to narrow almost to a blunt 

 point posteriorly. Génital and anal openings rather far apart ; the former small and square 

 with rounded corners, the latter larger and oval. There is a bunch of long hairs between 

 the two ; a sparse line of short hairs round each opening, and a few on the plates themselves. 



The nymph. In company with the adults of tliis species also are what I believe to 

 be the nymphs, and shall treat as such ; they hâve considérable resemblance to the nymphs 

 of Notaspis antarctica but there are many différences. Form pyriform, rounded posteriorly. 

 Color much lighter than the adult and rather more yellow. Céphalothorax bearing a plate 

 on each side more chitinized than the rest. Pseudo-stigmatic organs similar to those of adult ; 

 interlamellar, lamellar, and rostral hairs ail resembling those of the adult in size and posi- 

 tion, but ail very strongly serrated. Legs resembling those of the adult except some différences 

 in the hairs. Claws large and monodactyle. Abdomen elliptical, or almost oblong with 

 rounded corners. Notogaster almost flat ; it bears a few (5 to 8) raisecl ridges which are 

 distant from one another ; they are transverse but not straight ; each ridge usually having 

 one to three wide undulations ; each ridge runs quite across the notogaster ; there are not 

 any différent latéral ridges. There are some sparse pairs of large, thick, curved, spatulate hairs 

 round the periphery (the number varies with âge). 



Notaspis sp. ? 



Length about o mm ,35. 



Breadth about o mm ,i7. 



Color light yellow-brown . 



There is a single injured spécimen of a small monodactyle species of this genus which 

 greatly resembles N . clavipectinaia ; but as the pseudo-stigmatic organs, which are characteristic 

 of that species, are broken off it is not possible to be certain. The tibias of the first pair 

 of legs hâve a slight rising carrying the tactile hair, almost like N. tibiahs, but it is not 

 tibialis ; the second tectopedia are rather small for N . clavipectinata. 



