IN THE LOWER TEllTIAEi' STEATA OE NEW ZEALAND. 209 



laterally lias the form of a simple hook. A similar iueqiiian- 

 chorate is figured by Hansen in 'Esperia hihamatifera, Vosmaer 

 (Norw. North Atlant. Exp., Spong. 1876-8, pi. iii. fig. 5). 



lophon ? — PI. X. fig. .19. Inequianchorate with large end 

 semi-ovate in outline, lateral palms evenly curved, slightly 

 extended helow, base evenly rounded, tubercle elongate ovate, 

 anterior palm elliptical. Small end round at base, with pro- 

 minent tubercle and two lateral teeth projecting obliquely 

 upwards. Length of spicule "OoS mm., of larger end •023 mm., 

 width -026 mm., thickness of shaft -006 mm. In the character 

 of the small end of the spicule this form resembles some of the 

 inequianchorates belonging to lophon, e. g. I. abnormalis, 

 Eidley and Dendy (Chall. Eep. vol. xx. p. 122, pi. xvii. figs. 7, 8). 



l<]qidanc}iorate Flesh-Spicules q/'Esperiopsis, Carter. 



JEsperiopsis (a). — PL X. fig. 23. Equianchorate elongate, 

 navicular, the ends semi-elliptical, lateral palms evenly curved, 

 rounded below, tubercles ovate, anterior palms the same width 

 as the spicule, bases truncate. Axial canal extending between 

 the tubercles. Length of spicule "053 mm., of the palmate ends 

 •023 mm., width "015 mm., thickness of shaft "0066 mm. This 

 form is very similar to the equianchorates of the recent 

 Esperiopsis profunda, Eidley and Dendy (Chall. Eep. vol. sx. 

 p. 83, pi. xix. fig. 1 h), from the Crozet Islands, Southern Ocean, 

 in a diatom ooze at a depth of 1600 fathoms. 



Esperiopsis (b). — PI. X. fig. 24. Navicular equianchorate 

 with subtriangular palmate ends, lateral palms with slightly 

 curved margins, bases nearly straight, tubercles distinct, sub- 

 triangular, shaft slender, curved. Axial canal connecting the 

 tubercles at either end. Length of spicule "056 mm., of the 

 palmate ends '025 mm., width of same '016 mm., thickness of 

 shaft -003 mm. 



Esperiopsis (c). — PI. X. fig. 26. Equianchorate, elliptical in 

 outline, lateral palms evenly curved, margins slightly revert 

 below, tubercles elongate, distinct, anterior palms nearly as wide 

 as the spicule, bases nearly straight. Length of spicule '05 mm., 

 of the palmate ends "02 mm., width "023 mm., thickness of shaft 

 •004 mm. 



PL X. fig. 25. This is the lateral view of an equianchorate of 

 the same size as the preceding (fig. 26), but having the shaft 

 apparently wider. 



LINN. JOUEN. — ZOOLOGY, VOL. XXIT. 15 



