46 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



One or two smaller spinelets continue the furrow series along the 

 concave portion of margin, and directly behind these on the surface 

 of plate is a conical hyaline spinelet, stouter and shorter than the 

 furrow spinelets, except on the first five or six plates, as the subambu- 

 lacral becomes smaller from the fifth plate toward the mouth, and is 

 more delicate than the furrow series. 



Mouth plates with 4 or 5 marginal, and 5 to 8 suboral, spinelets. 



Superambulacral plates present, small, the first plate occurring on 

 the fourth ambulacral ossicle (on the third in crispatus). 



Type.—Cvii. No. 30505, U.S.N.M. 



Type-localiUj. — Station 5528, between Siquijor and Bohol Islands, 

 Philippines, 429 fathoms, globigerina ooze, bottom temperature 

 53.3° F. 



Distribution. — From the east coast of Luzon to Borneo and Celebes, 

 339 to 742 fathoms, on globigerina ooze and mud. • 



Spedmens examined. — Thirty-three. 



Specimens of Ctenodiseus onentalis examined. 



Sta- 

 tion. 



Locality. 



Depth 



Nature of bottom. 



Bot- 

 tom 

 tem- 

 pera- 

 ture. 



Num. 

 ber. 



5126 



5274 

 5423 



5460 



6470 



5499 : 



5527 I 



5528 1 

 5529 

 55S5 I 

 5586 i 

 5587 

 5605 i 



I 



5618 ' 

 5619 



Fath- 

 oms. 



Sulu Sea, vicinity southern Panay, 10° ' 742 



34'45"N.; 126° 47' 30" E. I 



China Sea, SW. of Manila Bay \ 525 



Sulu Sea, vicinity Cagayanes Is., 9° 38' 508 



30" N.; 121° 11' E. 



Lasonov Gulf. E. coast Luzon, 13° 32' 30" I 565 



N.; 123° 58' 06" E. j 



Laeonov Gulf, E. Coast Luzon, 13° 37' i 560 



30" N"; 123° 41' 09" E. j 



Mindanao Sea, vicinity of Iligan Bay I 554 



Between Siquijor and Bohol Islands 1 392 



do ' 439 



do I 441 



Sibuko Bay, Borneo 447 



do I 347 



Gulf of Boni, 3° 17' 40" S.; 120° 36' 45" E 415 



Gulf of Tomini, Celebes, 0° 21' 23" N.; 647 



121° 34' 10" E. 



Molucca Passage, 0° 37' N.; 127° 15' E .. . 417 



Molucca Passage, 0° 35' N.; 127° 14' I 435 



40" E. 



GulfofBoni, 3° 17' 40" S.; 120° 36' 45" E. 484 



Soft green mud. 



Gray mud, sand 



Gray mud, coral sand . 



Gray mud. 

 Mud 



o p 



49.5 



41.3 

 49.8 



Green mud . fine sand . . 



Globigerina ooze 



do 



Gray mud, globigerina. 



Fine sand 



Gray mud 



Green mud, sand coral. 



52.3 

 53.3 

 53.3 



Gray mud 



Fine gray sand, mud. 



Gray mud 



Subfamily Goniopectininae Fisher. 



Goniopectininae Fisher, 1916ff, p. 2. 



Diagnosis. — Marginal cribriform organs consisting of discrete 

 spinelets covered by a single webbed series on the transverse margin 

 of the plate; well-developed intestinal coecum, intestine, and apical 

 pore. 



KEY TO THE KNOWN GENERA OF GONIOPECTININAE. 



a\ No odd interradial marginal plate; a fimbriate channel leading from outer 

 end of mouth plates to the median interradial cribriform organ. 



Ooniopecten Perrier. 



