NO. 2 ZIESENHENNE: NEWOPHIURANS 23 



Oral shields small, diamond shaped, about as long as wide, with an 

 angle within and without. Adoral plates broader than long, meeting with- 

 in, separated at the outer ends by the first under arm plate. Jaws small, 

 triangular, depressed medianly. Three oral papillae on a side, outermost 

 largest, rectangular, broader than long, slightly elevated above the jaw; 

 median as long as wide, elevated above the jaw; apical slightly longer 

 than wide, separated from each other and set deeper in the mouth than 

 other papillae. Four teeth, uppermost longest, lowest shortest. All plates 

 of the oral frame and mouth more or less swollen and rounded on the 

 angles. 



Interbrachial spaces below covered with a dense coat of minute 

 granules; those along the genital slits and disk margin slightly larger. 

 Genital slits long, extending from the oral shields to the disk margin. 

 First under arm plate small, pentagonal, in contact laterally with the 

 adoral plates. Second and succeeding plates pentagonal, slightly wider 

 than long, angle within, proximal lateral margins concave, lateral mar- 

 gins almost straight, distal margin straight, but becoming notched distal- 

 ly, basally all angles rounded. Two rather large tentacle scales, one on 

 the side arm plate, oval, and one on the under arm plate longer than wide; 

 the two are in close contact. 



Color. — Dried from alcohol, disk light gray with a brownish drab 

 mark centrally on the radial shields and primary plates. Arms light gray, 

 arm spines white. Interbrachial spaces below light tan, mouth parts and 

 under arms dull white. 



Types. — Holotype, AHF no. 18; 35 paratypes. 



Type locality. — Station 964-39, 2-8 fms., Tenacatita Bay, Mexico, 

 I\Iay 8, 1939. An additional 13 paratypes as follows: one from Station 

 209-34, 8-10 fms.. La Libertad, Ecuador, February 9, 1934; 2 from 

 Station 259-34, 12-20 fms., Tangola-Tangola Bay, Mexico, February 28, 

 1934; 4 from Station 281-34, 35-40 fms., Santa Maria Bay, Lower Cali- 

 fornia, Mexico, March 7, 1934; one from Station 492-36, 35 fms., San 

 Lorenzo Channel, Espiritu Santo Island, Lower California, Mexico, 

 February 19, 1936; one from Station 541-36, 60 fms., Puerto Refugio, 

 Angel de la Guardia Island, Gulf of California; 3 from Station 767-38, 

 40-50 fms., off Mexico, Lat. 15° 55' N., Long. 97° 41' W., January 9, 

 1938; and one from Station 770-38, 7 fms., off San Jose Light, Guate- 

 mala, Januaiy 11, 1938. 



Remarks. — This species differs from Amph'ichondrius granulosus 

 Nielsen in having a disk rosette, upper and under arm plates separated by 



