508 PJOTKO.MV/.i.MIIi.i;. 



retroinyzou anwumlteri, I'Jtilippi, 1Vici/>n. Arcli. IBd.'j.p. l'07, tab. 10. 

 fig-, b (not correct ). 



acutiilens, I'hilippi, I. c. 1804, p. 107, or Ami. S,- Marj. Nat. Hint. 



180o,xvi. p. 221. 

 Manflibiilary lamina croscciit-shapcd, with about nine acute conical 

 cusps, three of which are larger than the others. Suctorial teeth in 

 somewhat distant series, radiatiuf? from the centre ; the teeth of the 

 series between the mandible and the posterior lip being as numerous 

 as those of the other series, but ratlier more confluent. The ante- 

 rior labial teeth converge and are eouiiuent behind ; each tooth of 

 the posterior pair is like one half of an elongate oval. Suctorial 

 disk elliptic, with a free lip behind. Tlie first dorsiil at a consider- 

 able distance Irom the second. Body immaculate. ' 



Tasmania ; Valparaiso. 

 a. Type of Carcujola lajjichla, {\h inches long. Valparaiso. 

 h. Tj'pc of Petromijz:)n murdax, U inches long. Tasmania. From 

 the Haslar Collection. 



The example of which llichardson has given a figure, and which 

 is the tji^e of the species, was evidently always in a bad condition. 

 At all events it had lost the horny coverings of many of the teeth, 

 and especially of the lingual teetli. The prominences on which these 

 teeth stand do not show the same outline of form, as the horny 

 coverings and many of the smaller teeth disappear entirely. Thus 

 the seeming discrepancies between Carugola and Murdacia are to be 

 explained. That this is really the ease is proved by still remaining 

 i'aint traces of serrature of the lingual prominences in the ty]je 

 S])ecimen of F. monhi.v. 



According to Thilippi's observations, also this species appears to 

 be sometimes provided with a gular sac. 



4. GEOTE-IA. 



Geotria et Velasia, Gray, Chondropt. p. 142. 



Dorsal fins two, the posterior separate from the caudal. Maxil- 

 lary lamina with four sharp flat lobes : a ])air of long pointed lingual 

 teeth (like the horns of a young antclopcj. 



South Australia and Chile. 



1. Geotria australis. 

 Gray, I. c. pi. 2 (or Proc. Zool. Sor. 185] , p. 2."18). 

 Skin on the throat very lax, forming a large ])ouch. The maxil- 

 lary lamina is thin, crescent-shaped, witli four sharp teeth, tlie 

 middle pair of which are only half as broad as the outer. Mandi- 

 bulary lamina very low, slightly sinuous. Suctorial tteth in nume- 

 rous series, rather di.stant from one another, anicuspid ; only those 

 nearest to the mouth somewhat larger, the others small. Only one 

 transverse series of very small teeth between the mandibulary la- 

 mina and the posterior lip, which is beset with numerous broad, 



