52 NOTE ON NEW OR HARE BRITISH MARINE rOLYZOA, 



the species are given by Ehlers and by Joyeux-Laffuie in his second 

 paper.* Prouho's account contains some interesting details with regard 

 to the mechanism of burrowing in the tube of the host, and with 

 regard to the character of the larva, which, as Prouho has shown, 

 belongs to the Cyphonautes type. 



Hyi^o'phordla is probably common wherever Chccto])terus occurs. I 

 have not made any careful examination of the tubes of Terebella 

 conchilega, but it may be worth while to point out that Ehlers dis- 

 covered the Polyzoon most commonly in the parts of the tube which do 

 not project above the surface of the sand. 



2. Escharoidcs cptincuncialis, Norman. 



The history of this species, which was described from a single 

 fragment, not more than a (quarter of an inch long, is given on p. 339 

 of Hincks' British Marine Polyzoa (1880). The original specimen 

 came from deep water in the Minch. 



I obtained a single piece, closely resembling Dr. Norman's specimen, 

 in April, 1889. The fragment was dredged off Plymouth, but I am 

 not able to give either the exact locality or the depth from which it 

 was obtained. The specimen was mounted in glycerine-jelly, which 

 has unfortunately completely decalcified it, but from ray examination 

 of it, made in 1889, I can state that its agreement with the original 

 description was very close. 



3. Micropora complanata, Norman. 



Lepralia complanata, Norman, Ann. Nat. Hist. (3), xiii., 1861, p 85 ; Hincks, 



Ibid. (5), xix., 1887, p. 304. 

 Micropora complanata, Hincks, Brit. Mar. Polyzoa, 1880, p. 175. 

 Mevibranipora smittii, Manzoni, SB. Ak. Wien, Ixi , 1 Abth., 1870, p. 333. 



Dr. Norman's original specimens were from Mr. Barlee's collection ; 

 and although they were believed to be British, their locality was 

 unknown. Hincks (1887) has described specimens from the Adriatic, 

 and Manzoni (1870) had previously found the same species in the 

 Pliocene of Calabria. I believe I am correct in saying that no British 

 localities have yet been recorded. 



I found this species on the north-east side of the island of Tresco 

 (Scilly Isles) in the spring of 1895. It occurred commonly as large 

 white encrustations on the sheltered surfaces of the granite rocks 

 exposed between tide - marks. The empty Lamellibranch valves on 

 which Laminaria picked up on the shore had grown also afforded one 

 or two specimens. Dr. Norman kindly verified my determination, and 

 suggested to me that this is a southern species which only just 



* Arch, Zool. Exp. (2), vi. pi. viii. 



