DIPHASIA EALLAX. 249 



fig. C). Dr. Johnston's woodcut (fig. 12, c, d, page 72) 

 represents the male, which he strangely identifies with 

 pinaster, in spite of the totally different calycles ; and 

 Couch evidently refers to it when he says, in his remarks 

 on D. rosacea, " In a specimen before me the gemmules, 

 though ripe, are not yet excluded, and the spines not only 

 surround the upper edge of the vesicle, but are scattered 

 over one-third of the upper surface " *. 



Hab. Generally on other zoophytes ; Ilfracombe ; Swan- 

 age, Dorset, common; Filey; Whitby (T. H.): Gorran 

 Haven, Cornwall ; Peterhead (C. W. P.) : Brighton (Ellis) : 

 South Devon (Parfitt) . 



[In Mr. Busk's collection there is a fine specimen from 

 Port Adelaide, about an inch in height.] 



3. D. FALLAX, Johnston. 



DYNAMENA PINNATA, Ffcm. Br. An. 545. 



SEKTULARIA PINNATA, Jolmst. B. Z. (1st ed.) 127, pi. ix. figs. 5, 6. 

 ,, FALLAX, Johnst. B. Z. (2nd ed.) 73, pi. xi. figs. 2, 5, 6. 

 DIPHASIA FALLAX, Agassiz, N. H. U. S. iv. 355. 



Plate XLIX. fig. 2. 



STEMS thick, pinnate; branches alternate, sparingly branch- 

 ed, springing from the front of the stem and arching 

 outwards the main shoots and many of the branches 

 terminating in tendril-like claspers ; HYDROTHEC^E shortly 

 tabular, the upper part free for a little way and slightly 

 divergent, with a wide plain aperture, the inner margin 

 of which is somewhat sinuatcd ; GONOTHEC^E (male) elon- 

 gate, slender, tapering towards the base, expanding up- 

 wards and bearing four stout and erect spines, which 

 surround the raised tubular aperture; (female) ovate, 

 deeply cleft above into four convergent leaf-like segments. 



* Cornish Fauna, part. iii. p. 19. 



