42 



ECUIJ^ODEEMATA. 



anterior pair widely diverging, deep, forming a transverse line ; pos- 

 terior close together; anus marginal; peristome margined, anterior, 

 lipped. Length, 5 5; breadth, 4 35. 



Localities. — Motupipi (Hoehstetter) ; Waikata South Head (Hoch- 

 stetter). 



This species is not represented in the Colonial Museum. 



BRISSIOPSIS. 



Ambulacra short, broad : apical part of odd ambulacra with large 

 pores ; apex sub-median ; tubercles crenulated. 



21. B. hectori, sp. nov. Oblong, anterior ambulacrum short, 

 truncated, deeply sunk, straight, pores ^Yell marked ; lateral ambulacra, 

 sub-equal, ])osterior rather longer, sub-petaloid, in shallow grooves; 

 apex sub-central. Length, 2"25; breadth, 1'65 ; height, "95. 



Localities. — Brighton. 



22. B. alta, sp. nov. Ovate, elevated, higher behind ; anterior 

 ambulacrum slightly sunk ; laterals in shallow grooves ; anterior pair 

 rather transverse ; posterior longitudinal ; apex anterior ; mouth very 

 eccentric, lipped. Length, 2 ; breadth, 1"75 ; height, 1'4. 



Localities. — Oamaru. 



HEMIASTER. 



Like Brissiopsis, but without a sub-anal fasciole. 



23. H. pOSita, sp. nov. Cordate, inflated, posterior end higher, 

 apex sub-central, covered with small tubercles ; ambulacra stellate, the 

 posterior lateral pair shorter and with the pores on the inner side near 

 the apex obliterated ; lateral ambulacra rather sunken, sub-petaloid, 

 blunt at their apices ; odd anterior ambulacrum rectilinear, in a shallow 

 groove that extends round the anterior end to the mouth ; no sub-anal 

 nor peripetalous fasciole. Length, 2 35 ; breadth ; 2*15 ; height at 

 posterior end, 1'5. 



Localities. — Curiosity Shop. 



MEOMA. 



Heart-shaped; vertex sub-central ; ambulacra in deep grooves, the 

 odd anterior one entirely obliterated. 



24. M. crawfordi, sp. nov. ; Brissus crawfordi and B. hrevipe- 

 talata, Hector, Cat. Col. Mus., 1870, p. 190 ; not B. brevipetalata, 

 I.e., p. 192. Cordate, depressed, covered with small sunken tubercles ; 

 apex rather anterior ; ambulacra long, deeply sunken, anterior pair 

 rather shorter, odd anterior entirely obliterated ; anterior groove 

 shallow near the apex, but deepening gradually, and forming a deep 

 anterior sinus ; peripetalous fasciole very sinuous, with a deep in- 

 flection just above the anterior lateral ambulacra ; posterior ambu- 

 lacra nearly straight, anterior slightly curved forwards. Length, 4-8 ; 

 breadth, 4 4; height, I Q. 



