of South Devon and South Cornwall. 157 



William Laughrin, of Polperro, for the supply of many rare and 

 interesting specimens. To collectors in the various departments 

 of marine zoology I can recommend him as a most efficient ally. 



Subkingdom CCELENTERATA. 



Class HYDROZOA. 



Order CORYNID^, Huxley. Fam. Coryniadae. 



1. Clava, Gmelin. 



C. multicornis, Johnston. 



Syn. C. repens, T. S. Wright, Edinb. New Phil. Journ. for July 1857. 

 C. discreta, Allman, Ann. & Mag. Nat. Hist, for November 1859. 



Between tide-marks ; commonly on stones. 



Dr. T. Strethill Wright, in his valuable observations on Clava 

 in the 'Edinb. New Phil. Journal/ has corrected the error of 

 previous naturalists, who have universally described the polypes 

 of this genus as naked and single. There is great diversity in 

 the size of the cup-like extension of the polypary, which sur- 

 rounds a portion of the polype-body. Frequently it is nothing 

 more than a very delicate envelope which invests the base, and 

 in this condition may readily escape detection. In other cases 

 it rises to a considerable height, and forms a true hydrotheca, 

 which covers a third or more of the body. 



2. Vorticlava, Alder. 



V. humilis, Alder, Catal. of the Zoophytes of Northumberland 

 and Durham, 12, pi. 1. figs. 1-3. 



Dredged on Salicornaria in Salcombe Bay. 



A single polype only occurred. The number of the lower 

 tentacles was nine. They seemed to be slightly enlarged above, 

 though not truly capitate like those of the upper circle. 



The Corymorpha annulicornis of Sars (Forhandl. i Vidensk. 

 Selsk. i Christiania, 1859) may possibly prove to be a second 

 species of this genus. 



3. Hydractinia, Van Beneden. 



H. echinata, Fleming. 



On shells (Buccinum most frequently, Trochus zizyphinus, 

 Natica) ; common. 



4. Myrjothela, Sars. 



M. arctica, Sars. 



Attached to stone, in a rock-pool at Meadfoot, Torquay. 

 I have only found one specimen ; but Mr. Cocks speaks of 

 the species as abundant in Cornwall. 



