ELIOT: JIUDIBEANCIIS OF NEW ZEALAND. .333 



Alloiodoeis, Bergh, 1904, 

 This remarkable genus was created by Bergh for specimens from 

 Tasmania in which the hermaphrodite gland is not spread over the 

 liver as in nearly all known Dorids, but is collected into a separate 

 mass. The teeth are denticulate, a labial armature is sometimes 

 present, the male genitalia are armed with spines, and the back is 

 covered with small tubercles. This peculiar conformation of the 

 hermaphrodite gland also occurs in Baihydoris and Trevelyana, but it 

 seems impossible to associate Alloiodoris (which in other respects is 

 a normal cryptobranchiate Dorid) with either of those forms. The 

 condition in which the hermaphrodite gland is a separate mass is 

 probably older than the condition in which it is a mere layer spread 

 over the liver, and it would seem that very different families of the 

 Dorididae sporadically preserve or revert to the older arrangement. 

 Abraham's Doris lanuginata, of which I have examined the type and 

 also more recent specimens sent by Mr. Suter, proves to belong to 

 this genus, which thus contains : — 



1. Alloiodoris marmorata, Bergh. 



2. A. lanuginata (Abraham). 



A. lanuginata possesses a not very solid labial armature, which is 

 not recorded of A. marmorata, but I do not think this character 

 justifies the creation of a new genus. 



Alloiodoris lanuginata (Abraham). PI. XXVIII, Figs. 1, 2. 

 Doris lanuginata, Abraham : Proc. Zool. Soc, p. 255, pi. xxix, 



figs. 15-17, 1877. 

 Alloiodoris marmorata, Bergh : Malac. TJntersuch. in Semper's Ptcisen, vi, 



p. 42, 1904. Basedow & Hedley : Trans. K. Soc. South Austr., 



vol. xxix, p. 152, 1905. 

 The following description is based upon fresh material sent me by 

 Mr. Suter, because the type-specimen, described by Abraham, is old, 

 and has naturally suffered in the lapse of time. It is, however, certain 

 that it is an Alloiodoris, and hardly less certain that it is the same 

 species as the Alloiodoris sent by Mr. Suter. (1) Allowing for the 

 loss of colour and the flabbiness produced by decay, the external 

 characters are the same. (2) The radula and the peculiar shadowy 

 labial armature are exactly the same. (3) So are the armature of 

 the vas deferens and of the verge, as well as the arrangement of the 

 hermaphrodite gland, which is the chief character of the genus. 



I have examined Abraham's type-specimen preserved in the British 

 Museum, and two recent specimens from jS'ew Zealand, one from Cook 

 Strand and one from Takapuna. These agree, except in colour. 

 "With the Takapuna specimen is a note saying: "The ground colour, 

 which is gone, was a dirty red with numerous white pustules." By 

 a curious change it has become greenish grey with blackish mottlings. 

 The specimen from Cook Strand is 50 ram. long, 33 broad, and 16 high. 

 The dorsal surface is flesh - coloured, with 25 scattered brownish 

 spots. There are also a few spots on the under-side of the mantle, 

 near the junction with the foot. The consistency is finn, but soft 



