80 



There are three immature females in the collection 

 closely resembling this, except having no protuberances on 

 the anterior portion of the abdomen. 



Measurement of these four, about 8 mm. long by 5 mm. 

 wide. 



Measurement of G '. tuberculosa, 5 mm. by 2 J mm. 



Measurement of C tuberculosa, var. bispinosa, 7 mm. 

 by 3J mm. 



All specimens are from South Australian coast. 



Cymodoce septemdentata, n. sp. PI. xxii , figs. 8 to 17. 



The body is rather narrow, very convex, with the sides 

 nearly straight. The head is rounded, very abruptly declivous 

 anteriorly, and its surface a little roughened. The eyes are 

 prominent. 



The first thoracic segment is a little longer than any 

 of those which follow, and the last three are each provided with 

 a row of tubercles on their posterior borders; these become 

 more numerous and spiniform on the last. The epimeral plates 

 of all the thoracic segments except the last are truncated 

 behind and are vertical in direction. 



The abdomen is covered with large tubercles, the pos- 

 terior portion descending abruptly behind to near the margin, 

 which is slightly produced, while its upper surface has a 

 median shallow depression. On the inferior view the abdomen 

 shows a narrow V-shape, being produced to a triangular 

 point at the exit of the channel, which is moderately deep; 

 on each side of the median one there are three other small 

 projections or teeth, thus showing six small notches on the 

 posterior border. 



The surface of the basal joints of the antennules are on 

 the same level as the surface of the head, the rostrum meet- 

 ing the epistome in a broadly truncate manner. The epis- 

 tome is small, the upper lip long. 



The first antennular joint is not produced distally at 

 either angle, the third joint is about twice as long as the 

 second, the flagellum is shorter than the peduncle, and has 

 8 joints. 



The antenna is slightly shorter than the antennule, and 

 its very short flagellum has only 5 or 6 joints. 



The mandibles are strong and project much. 



The legs are robust, with rather short dactyli, except for 

 a longish nail, and they are without the furry pads noticed 

 in other species. 



The first pleopods have the inner ramus short, about as 

 broad at its base as its length; the inner margin with short 



