MARINE BIOLOGIC A.L STATION AT PORT ERIN. 23 



Ampliiura squamata 

 Op 7i log lyp ha alb Ida 

 Tealia crassicornis 

 A Icyonium digitatum 

 Clytia johnstoni 

 Lafoea dumosa 

 Hydrallmania falca ta 

 Ha lee i um h a lee inum 



Antennularia ramosa 

 Coppinia arcta 

 Sertularella polyzonias 

 Sertularia abietina 

 S. argentea 

 Diphasia rosacea 

 D. tamarisca 

 Tub idaria indivisa 



This was a haul — from very shallow water — which 

 combined mere quantity of life, i.e., number of individuals, 

 with variety of life or number of species and genera. The 

 ten species of fish were represented by 879 individuals, 

 and we estimated that there were some hundreds of crabs 

 and of starfishes, and some thousands of shrimps. The 

 numbers of the Molluscs, of the hermit-crabs, of Balanus 

 and of Spirorbis were also very large. 



From these statements it is clear that whether it be a 

 question of mere mass of life or of variety of life, haul for 

 haul, the shallow waters can hold their own against the 

 deep sea, and form in all probability the most prolific 

 zone of life on this globe. 



Relations of Genera to Species. 



A point which comes out in making complete lists, such 

 as those given above, of the contents of the net on one 

 haul is the relatively large number of genera represented 

 by the species.* In the haul, quoted above, from the 

 expedition of June 23rd, the 112 species were referred to 

 103 genera ; in the haul from the Fisheries steamer on 

 July 23rd, the 39 species obtained belong to 34 genera ; 

 on August 3rd, there were 78 species and 67 genera, and 



*Dr. Murray, in the Challenger " Summary," notes this fact in the case of 

 deep-sea hauls, but does not seem to recognise its application to shallower 

 waters. 



