ZOOLOGY. 17 



forms of life, Eoioon (thousli Uio cl^iim of Eozoon to bo rcirardod ns an fiiiim;il Ims 

 been disputed), and both the whito chalk of Okl Eiidaud and the Kunumilitic 

 limestone of Europe and Asia (extensively developed in Afghanistan) are lartjely made 

 up of these organisms. A living species too is now filling up the Atlantic depths 

 with the Globitierina oozo as it is called, and it is known that they are capable of 

 existing alive at even such enormous depths as 2000 fathoms or more. 



Sub-Kingdom 11. CCELENTERATA. 



Class SPONGIA. 



The sponges of Burma both marine and freshwater await invi'stigation. They 

 are " fixed acpiatie organisms comjiosod of an aggregate of am(i-d)iform bodies, each 

 provided with a mouth and numerous pores, and including a fibrous framework 

 strengthened by horny, calcareous, or siliceous spicules. ],arva? free swimming" 

 (Pascoe). Saviile Kent describes them as " colony building, collar-bearing tlagidlato 

 monads, exhibiting neitlicr in their embryological nor in their adult condition 

 phenomena that do not find their parallel among the sim])lo unicellular protozoa." 

 The spicules imbedded in the sarcode of .s])<)ngcs arc beautiful obji^cfs under a 

 microscope. Sponges are divided into three cu'ders: Mii.rottixnuiiic. gelatinous sponges, 

 ■without skeleton ; FibroxpoHgiic, with siliceous or hoiuy skeletons ; Calcospongue, 

 with calcareous skeletons. 



The second order embraces the family Ift:rin'fiiie!Ii(he, to which belongs that 

 marvellous form EKplecfclhi, or ' Venus ilower-basket,' as it is called, a cornu-i'opi'.B- 

 like structure of interlacing glassy threads ; and the curious Ifi/a/oiicma or glass lopc 

 sponge, so well described and figured in his ' J)epths of the Sea,' by C. Wyvillo 

 Thomson, allied forms to both of which may not improbably be met with in Uurmcso 

 waters when the dredge has forced them to reveal some of their buried treasures. 



Class nYDROZOA. 



Simple or compound organisms, the individual polypite consisting of a sac, 

 composed of an outer and inner membrano inclosing a stouuieh, not ditl'ercntiated 

 from the general body-cavity, the opening furnished with tentacles. Kc]n'oducti(ni 

 takes place by ova or zooiils, partially in(le]H'ndcnt organs jmulueed by gemmation. 

 In this class alternation of generations occurs, that is, after some agamic generations, 

 sexual organs are developed e.\terior to the body-cavity. 



Sub-class UYDROIDA. 



Order ELEUTItEROBLASTEA. 



To this order belongs the common freshwater 'jwli/pus ' (^Jli/i/ra viridis) of 

 Europe. 



Order G YJrXOBLASTKA. 



Famihj Eudendriidse. 

 Eudendrhtm eamostjsi, Armstrong. Arakan Coast, 10 to 70 fathoms. 



Order CALYPTOBLASTEA. 



LAFoii.v KLONGATA, Armstrong. Diamond T. lietween tidcMuarks. 



Haxicornabia sutosa, Armstrong. Cape Negrais and ('lieduha, thu Terribles, 



in 8 to 25 fatlioms. 



II. PLUMOSA, Armstrong. Chcdnba, 10 to 15 I'atlioms. 



Skutularella RKiosA, Armstrong. Arakan Coast, 10 to 15 fathoms. 



TnrMAEiA coJiPREssA, Armstrong. Diamond I. between tidemarks. 



Antennella Axlmanni, Armstrong. Cheduba, 8 to 10 fathoms. 



For desci'iptions of the above Hydroid zoophytes see Dr. Armstrong's Pajicr in 

 Journal As. Soe. Bcng. 1879, p. 98. 



