The Canadian Marine Biological Station. 313 



The Echiiiodermata are well represented. Prof. Ganong, 

 in his paper on " Tiie Echinodermata of New Brunswick," 

 mentions twenty-eight species. The common Star-fish 

 (Asterias Vulgaris), the Sea Urchin {Strongylocentrotus 

 Drohachiensis), the "Sand-Dollar" (JEchinarachnius Parma), 

 the Sea-Cucumber (Cucumaria Frondosa), together with 

 several Brittle-stars, and the delicate and transparent 

 Synapta, are among the more common. 



Of Crustacea the most abundant and conspicuous 

 are the Barnacles (Balanics Balanoides), which are so 

 numerous along the littoral zone as to give the rocks in 

 many places a marked white appearance. 



Crabs and lobsters, although not very abundant, are met 

 with, and little Amphipod Crustacea of the genus Gam- 

 marus are found in swarms in the tide pools and in the 

 shallow water. In many places beautiful Isopoda are 

 found swimming on the surface, and the Hermit-crab 

 {Benihardus Fuhescens) is frequently seen occupying the 

 shells of whelks and other Gastropods. 



A list of even the more common Mollusca would, I fear, 

 prove tedious, but Prof. Ganong's delightful little book on 

 " Tlie Economic Mollusca of Acadia " will be read with 

 pleasure by all interested in the subject. Among Lamelli- 

 branchs clams of the genus Mya, Mussels (Mytilus) 

 and Horse-mussels {Modiola) are abundant ; the former 

 buried in the sand with nothing but the siphons visible, 

 and the latter attached to the rocks by means of their 

 byssus, or forming large beds, where the star-fish congre- 

 gate to feed upon them. The Scallop {Pecten Islandiciis) 

 is also found in fair quantity, and by means of the dredge 

 numerous and interesting forms are to be obtained. 



Another Lamelli branch of economic as well as of scien- 

 tific interest is the Teredo, or ship-worm, so injurious to 

 timber. 



Of Gastropoda,whelks (Buccinum) and Limpets {Acmma), 

 together with the so-called round-whelks (Lmiatia) and 



