78 



to hold and partially cover the external ramus. The external 

 ramus is shorter than the inner and bifid at the end. 



Budding sternal filaments are present, but there is no 

 appendix masculina . 



The colour is light-brown with black pigment, which in 

 some specimens is coarse and striped with a wider median 

 stripe ; other specimens have more dendridic spots, in some 

 parts there being a bluish tinge — spirit specimens. Females with 

 young have a bleached appearance, with small black spots not 

 very numerous. The adult males are somewhat between these 

 two as to colour. The adult males vary a little in size among 

 themselves, while the females are a little larger. 



The young ready to quit the parent have the end of the 

 abdomen pointed like that of the immature male of the next 

 variety. 



Cymodoce tuberculosa, n. var. bispinosa. PL xxi., 

 figs. 21 to 23 ; PI. xxii., figs. 1 to 7. 



Cymodoce tuberculosa, Baker, Trans. Rov. Soc, S. Aus., vol. 

 xxxii., 1908, p. 140, pi. iii. 



Besides the two processes on the anterior portion of the 

 pleon, the following differences may be noted : — 



The body is rather less granulated. 



The posterior portion of the abdomen is not so excavated 

 at the bases of the uropods, and there is a small conical 

 tubercle beneath each process of the anterior portion. 



The notch of the posterior border is much more open, 

 and the excavation is not so broad at its base, and the median 

 process is not so much raised, and just reaches the level of 

 the sides. The more external notches noted in C . tuberculosa 

 are seen below only as small tubercles, scarcely reaching the 

 margin. 



The epistome has the two tubercles much reduced, while 

 the rostral pair are quite prominent. 



The antennular teeth are 5-6 in number. 



The sternal filaments are long and slender. 



The difference in size also is considerable. 



The specimen regarded as the mature female has the 

 body comparatively smooth and the hairs scanty, except that 

 on the segments corresponding with the male there are trans- 

 verse rows of very minute granules arranged in two lines as 

 the spines of the male. 



The epimera of the thoracic segments are like those of 

 the male, and like it there is a faint rounded tubercle on the 

 forehead. 



