204 DB. HINDE AND MB. HOLMES ON SPONaE-EEMAINS 



teeth or palms stout, evenly curved, anterior tubercles ovate, 

 prominent tongue-shaped anterior palms. Length of spicule 

 '073 mm., of teeth or jDalms •023 mm., width across them "03 mm., 

 greatest thickness of shaft '015 mm. This form resembles the 

 anchorates in an Australian variety of Desmacidon fruticosa, 

 Montagu, sp., figured by Kidley and Dendy (Chall. Eep. vol. xx. 

 p. 104, pi. xxiii.figs. 10 5, c), but it is about twice as large. It 

 corresjDonds also with Mr. Carter's figures of the equianchorate 

 of Halichondria incrustans, Bow. (Ann. & Mag. N. H. s. 4, 

 vol. xiv. 1874, p. 208, pi. xiii. figs. 1 «, &, c). The lateral view of 

 probably a similar spicule is shown in fig. 41. 



Desmacidon (c). — PI. X. figs. 38, 39. Equianchorate with 

 curved shaft, lateral teeth somewhat incurved and extended 

 below into a claw-like process ; anterior tubercles elongate, 

 anterior palm tongue-shaped. Length of spicule "05 mm., of 

 teeth '019 mm., width across teeth "26 mm., thickness of shaft 

 •006 mm. Fig. 38 is the front, and fig. 39 the lateral view of 

 the same spicule. 



Halicliondrla (a). — -PI. X. fig. 40. Equianchorate with strongly 

 curved shaft, so that, viewed laterally, it is G-shaped ; teeth 

 incurved, obtuse, central lamina very prominent. Length of 

 spicule "046 mm., of teeth "016 mm., thickness of shaft '0067 mm. 

 The lateral aspect of this spicule resembles that of the equi- 

 anchorates of Halichondria -pustulosa, Carter (Ann. & Mag. 

 N. H. s. 5, vol. ix. 1882, p. 286, pi. xi. fig. 1/), from near the 

 Falkland Islands at depths of 50-70 fathoms. 



Halichondria (b). — PI. X. fig. 42. Equianchorate with strongly 

 curved and apparently somewhat contort shaft ; teeth elongate, 

 inwardly curved and acutely pointed, anterior falces very pro- 

 minent. Length of spicule '034 mm., of teeth "015 mm., thick- 

 ness of shaft "0041 min. Only a lateral view of this spicule is 

 known. It is of the same character as the preceding (fig. 40), 

 but smaller, and the teeth are proportionately longer, so that 

 they overlap each other in the middle of the spicule. 



PI. X. fig. 43. Equianchorate with unusually long curved 

 shaft and short obtuse teeth. Only the lateral aspect known. 

 Length of spicule "038 mui., of teeth -0042 mm., thickness of 

 si 1 aft -0033 mm. 



It will be seen from the foregoing descriptions that the ancho- 

 rate flesh-spicules of the types of those occurring in Myxilla 

 and Desmacidon are very abundant and varied in the Oainaru 



