35. Rd. Radiolaria; minute marine protozoans which have a 



siliceous skeleton of spicules and radiating threadlike 

 pseudopodia. Radiolarian ooze contains large propor- 

 tions of radiolarian skeletons and is an important 

 constituent of the deep ocean deposits. Radiolarian ooze 

 is classed as mud on bottom sediment charts. 



36. Pt. Pteropods; pelagic, swimming-type gastropods in which 



the foot is modified into a pair of winglike lobes or 

 fins. Pteropod ooze contains conspicuous shells of these 

 pelagic molluscs ajid is an important constituent of 

 the deep ocean deposits, Pteropod ooze usually is classed 

 as mud on bottom sediment charts. 



37. Po. Polyzoa; Broyozoa, a colonial animeil that secretes a 



calcareous, horny, or membranous covering in a multi- 

 tudinous variety of forms and structures. Bryozoa may 

 form insignificant colonies on shells, or they may be 

 an important constituent of a reef. 



38. Cirripeda; barnacles. 



38a. Fucus; rockweed, any of a genus of olive-green or 



brown algae. Fucus grows attached to rocks; hence the 

 name rockweed. 



38b. Mattes; an uneven growth of seagrass. 



39. fne. Fine. 



40. crs. Coarse. 



41. sft. Soft. 



42. hrd. Hard. 



43. stf. Stiff. 



44. sml. Small. 



45. Irg. Large. 



46. stk. Sticky. 



