71 



Table VI. 



Anodontia edentuloides, Trachycardium belcher i, Pilar calharius, Chione 

 mariae and Semele paziana. 



A comparison was made between the occurrences of the species from the 

 southern intermediate shelf on sand or mud and as to whether they were 

 also found in the northern portion of this environment. Of the 128 species 

 of invertebrates found alive at the 1 1 stations, 40 species were common to 

 both sand and silty clay, and 16 of these also occurred in the north on 

 both sediments. Only 28 species were restricted to clay bottom in the 

 south, of which three were also found on sand in the north. On the other 

 hand, 57 species were found only on sand in the south (two stations), 

 eight of which were also found on sand in the north. All of the species 

 (living and dead) from the southern intermediate shelf can be found in 

 Table I. The distribution maps of the two southern crustaceans, Iliacantha 

 hancocki and Portunus acuminatus are shown on figs. 23a and b, while 

 the distribution of two gastropods, Bursa nana and Cantharus capitaneus 

 is shown on figs. 24a and b. The more common mollusks are figured 

 on Plate V. 



