Till-: BRACHTOPOD& 









the commoni si objects of the sea shore. They are minute, 

 aim--' tail roscopic creatures, social, growing in communi- 

 ties "f cells, forming patch 

 on sea-weeds ami stones i E 



!/• nibranipora solit i r- 

 tain deep-water sp< ow in 



soral-like forms i I .-. 59, Myrio- 

 l, n bile the chifc- 

 inous or homj Polyzoa are often 

 mistaken for sea-weeds on the 

 one hand, and Sertularian IIv- 

 droids on the oth 



The animals inhabiting the 

 microscopic cells are worm-like 

 creal urea (Fig. 60), with the di- 



; ive canal bent on itself and 



ling near the mouth, the lat- 

 ter surrounded, as in the larger 

 fresh-water sj }, 



With a horseshoe-shaped crown, 

 01" in the smaller marine forms Fig. ,; ' ■'' a Poly; 



l Circle of Blender Ciliated ten- B.Plwnatella/ruticosa. or. ten- 

 . ,.,, . . - tacular branchiae of lophoj 



tacles. I lie fresh-water forms ...... ;r,in- 



, , ,, . ,, \ 11s; t, cell: jr. i 



(/ himuhihi, etC.) secrete HO cord, at the in- 



i- i i li i • i sertion of which into the body the 



BOlld shell, and are either mOSS- generative products are devel 



like, or form large rounded ^HJ'SSSL , 



masses of a jdiy-iikc substance.* j;;™;:":;^!;;;;,';' 11 ""' ,,ri 



Class V\— Brachiopoda (Lamp Shells). 



General Characters of Brachiopods. — This group is named 

 Brachiopoda, from the feci -like arms, fringed with tenta- 

 cles, coiled up within the shell, and which correspond to 

 the borseshoe-shaped crown of the /' and the crown 



of tentacles of the Sabella-like worms. From the fact that 

 the animal secretes a true bivalved, a shell, though it 

 - usually ineqnivalve, i.e., the valves of different - . the 

 See the works of Allman, Hinks, Smitt, S 



