ADDENDA ET CORRIGENDA. 



Plate 7. — My friend Professor Spencer, in publishing a paper on the anatomy of Megascolides, says 

 I have referred it to the wrong Family. As he did not state what was the right Family, 

 I made inquiry and found he had taken Perrier's artificial divisions of Earth-worms 

 (into those having the male genital openings in front of, upon, or behind the clitellum) 

 for Families. Some of the Family Liimbficidce have these openings in one relative 

 position and some in the other ; the one artificial character not outweighing the many 

 structural characters indicating the Family. 



Plates 15, 29, 160. — For Aslacoides, read Astacopsis. 



Plates 16-17. — References: — For ? Perca trutta (Cuv. and Val.), Hist. Nat. des Poiss., v. 4, p. 54, 

 read vol. 2; add Perca marginata (Cuv. and Val.), Hist. Nat. des Poiss., v. 2., p. 53. 



Plate 42. — For Lymnodynastes, read Limnodyimstes. 



Plate 51. — Rhodona Ojjiceri is referred to E. punctata vittatum (C4unth. ), of Queensland, by Mr. 

 Boulenger, but the description in the Ann. and Mag. of Nat. Hist, for July, 1S67, diflfers 

 in several particulars. 



Plate 87. — Explanation of Figures: — Fig. 2, side view of snout, &c., should be: side view of female, 

 &c. Figs. Ic and Id should be Figs. 2c and 2d. 



Plate 109. — Footnote : — For large antennse, read inner antennae. 



Plate 112. — In last line of Reference: — For page 696, read page 174. 



Plate 122. — For Tfachypterus tcenia read T. Ueiiia. 



Plate 139. — {Mesojys pedestris). Add Reference : Erichson, Wiegmann Ai'chiv fiir Naturgeschicte, 

 1842, p. 250, t. 5. f. 10. 



Plates 161-2. — The numbers at corners of these plates have been accidentally transposed. That 

 marked 161 should be 162. 



Plate 187.— For Figs. 1-3 read Figs. 1-2. 



NOTE FROM MR. MACGILLIVRAY ON CHANGES IN NOMENCLATURE OF POLYZOA 

 ADOPTED IN THE ALPHABETICAL INDEX. 



It has become necessary to alter the generic positions of a considerable number of species, mostly 

 described in the earlier Decades, in consequence of the dismemberment of the old genera Mtmbrani- 

 pora, Lepralia, EscJiara, and one or two others. Definitions of the new genera, with some remarks 

 on the characters which are now considered of chief importance in the systematic arrangement of the 

 Polyzoa, will be found in my Catalogue, printed in the Transactions of the Royal Society of Victoria 

 for 1886. 



The alterations indicated are : — Membranipora pilosa, to be included in Electra, Lamx. ; M. 

 ciliaia, umhonata, cervicomis, and Lepralia trifolium in Amphihleslrum, Gray ; M. mamillaritt, dispar, 

 and Woodsii, in Thairopora, McG. ; M. perforata in 3Hcropora, Hincks ; Lepralia monoceron in 

 CribrUma, Gray ; L. ferox in Hiantopora, McG. ; L. JUahiaii, ciliata, diadema, and eanalkulata, in 

 Microjwrella, Hincks, the last as a variety of diadema; Eschara mucronata in Adeone/lopsis, McG.; 

 L. circinata, Cec'dii, subimmersa, Maplestonei, rilrea, schizostoma, botryoides, and pellucida, in Schizo- 

 porel/a, Hincks, pellucida as a variety of hyalina; Eschara obliqua in Parmularla, Busk, MSS. ; 

 Eschara quadrata in Lepralia; L. vUtata and Brogniartii in Chorizopora, Hincks ; L. marsiipimn and 

 papi/lifera in Porella, Gray ; Eschara dispar and platalea in Adeoiiella, Busk ; L. larralis and Eschara 

 gracilis in Porina, d'Orb. ; L. dlajihana, Ellerii, and excavala, in MucroneUa, Hincks. 



Besides these alterations, Catenicella aiirila and yeniinata are to be referred 'to Clanporella, 

 McG. ; Caleiiicellopsis ddicalula to Catenicella; Diachoris magellanica and spinigera to Beania, as I 

 cannot see any sutficient distinction between these genera. Carbasea ejiiscopalis is included in the 

 genus Euthyris, Hincks. Dirty opora differs from Adeona only in the fenestration of the zoarium, a 

 character which, although valid when the genus was proposed, cannot now be considered of sutMcient 

 importance for the foundation of a genus ; the species must therefore go with Adeona. Celte/iora 

 (Lepralia), mcgasoma, costata, rota, costazei, jilatalea, vitrea, henemunila, gloinerata, tiara, have been 

 separated from CMepora to form the genus Schismopora, McG. • 



Chlidonia dcedala proves to be, as suggested in my description, in no way diffei-ent from the 

 European C. Cordieri, Aud. sp. Cellaria Jtslulosa, var. AuMralis, must rank as a separate species. 

 Membranipora lineata is not that species, but M. pyrula, Hincks ; so also M. Jiofsellli must be altered 

 to Amphiblestrum hursarium, MoG. I doubt M. Lacroixii being identical with the European species. 

 Lepralia pertuna should be L. Pallasiana, Moll. Retepora porcetlana, var. laxa, has since been 

 described in the "Challenger" Memoir as R. producta. Busk. Bathypora porcellana was previously 

 described by Hincks as Membranipora nUens, and bis specific name must consequently be adopted. 



By Authority : Robt. S. Brain, Oovernment Printer, Melbourne. 



