General History of the Marine Polyzoa., 329 
distinctive features of JZ Peachvi are present in my variety — 
the smaller cell, the absence of striation on the front wall, 
the less massive mucro, and the comparative smallness of the 
oral denticle. ‘The two forms are probably distinet; Mr. 
Busk’s figure in the ‘ Challenger’ Report can hardly be 
referred to the var. octodentata, 
M. Peachit and M. ventricosa are closely allied species 
and have recently been united by Lorenz. They are liable 
to much variation, but there is a strongly marked character 
about the normal JZ. ventricosa. 
Ibid. (p. 66 sep.). 
Mucronella tricuspis, Sp. 1. 
Syn. Evochella longirostris, Jullien, Mission du Cap Horn, Bryozoaires, 
vol. vi. 1888, p. 55, pl. iii. figs. 1-4. 
I can see no difference of any moment between this species 
and Evxochella longirostris, Jullien. ‘The pores round the 
margin of the cell in the latter are wanting in my specimens 
of M. tricuspis; but this is a variable character and has no 
diagnostic value. The difference may be due to the degree 
of calcification. Except in this one particular there is a close 
agreement between Dr. Jullien’s figure (fig. 4), which is an 
admirable one, and my own. 
As for the genus Evxochella, it seems to me to be super- 
fluous. It is founded on a single character of no special 
importance—the elongate tooth on the lower margin of the 
orifice, “‘ forming a kind of spur,” and dividing the lower lip 
of the peristome into two distinct portions. If genera are to 
rest on such slight foundations they may be indefinitely 
multiplied and will lose altogether their significance and value 
as representative of leading morphological types. 
Additional Loc. ‘Tierra del Fuego; Chiloe Archipelago 
(Darwin) ; Simon’s Bay, Cape of Good Hope; Prince 
Edward Island, 80-150 tath. (Busk, ‘Chall.’ Rep.); Port 
Phillip Heads and New Zealand (JacG.). Fossil : Petane 
(Waters) ; Ile Hoste, baie Orange ; Canal du Beagle, au sud 
de Vile Gable (Jullien). 
Ibid. (p. 66 sep.). 
Rhynchopora longirostris, sp. n. 
Not identical with Mucronella tubulosa, Hincks (see 
‘ Annals’ for August 1891, p. 172). 
Ann. & Mag. N. Hist. Ser. 6. Vol. ix. 24 
