32 ZOOLOGICAL COLLECTIONS MADE DURING [Jan. 4 



employed that name for what appears to be a species of Triton, 

 judging from the figure cited in Knorr's ' Vergniigen,' vol. ii. 

 t. 27. f. 3. 



Cerithium (Bittium) c^latum, Couthouy. 



Hab. Boija Bay, 20 fathoms {Coj)pinger) ; " Orange Harbour, 

 Terra del Fuego " {Couthouy). 



Of the three series of granules encircling the whorls, the upper- 

 most is the finest, and the lowermost the coarsest. 



This species is figured in the Atlas to Wilkes's Exploring Expedi- 

 tion (figs. 17-4-174 rf). 



Trochita (Clypeola) corrxjgata. Reeve. 



Hab. Stations 6 and 7. 



To this species probably belong Trochus pileus, Lamarck, Tro- 

 chntella pileolus, d'Orbigny, and Calyptrcea costellata, Philippi. 



Crepipatella dilatata, Lamarck. 



Hab. Station 5. 



These specimens differ from those found more north in being 

 entirely destitute of colour, like C. pallida, Broderip ; but in other 

 respects there appears to be no difference. 



Lamellaria PATAGONicA, sp. H. (Plate IV. figs. 9, 9 fl, 9 b.) 



Peronia, sp., Cunningham, Nat. Hist. Straits of Magellan, 1871, 

 plate before p. 75, fig. 1 , and p. 449 ; id. Trans. Linn. Soc. vol. xxvii. 

 p. 484, pi. 58. figs. 4 a-b. 



" Mantle of a dirty yellow colour, marked with lines and blotches 

 of light vandyke-brown, and its undersurface around the foot was 

 marked with light-coloured striae " '. Animal high, convex, ex- 

 hibiting to some extent the form of the shell, owing to the thinness 

 of the mantle which envelops it. Foot somewhat truncate in front, 

 gradually tapering towards the other end, which is rounded. Ten- 

 tacles shortish. Eyes apparently sessile, situated at the outer bases 

 of the tentacles. The teeth on the lingual ribbon in three series : 

 the central with two equal diverging shanks, joined at the apex, 

 which is recurved, with a small tooth on the middle of the cutting- 

 edge and still smaller ones on each side ; the lateral teeth are 

 acute at the tip, recurved, very finely serrate on the outer side, 

 the serration being restricted to the central portion, also with an 

 inner lateral prominence separated in part from the tooth by a 

 sutural line, more strongly serrated than the outer edge, the den- 

 ticles being apparently seven in number. 



From his description it will be seen that the character of the odon- 

 tophore is very similar to that of L. producta (Troschel, ' Gebiss 

 der Schnecken,' i. pi. xvi. fig. 4) ; but the shanks of the median 

 tooth are not unequal, and the lateral teeth are more hooked at the 

 tips. The horny oral process is composed of two pieces, very similar 

 to those of L. perspicua (Troschel, /. c. fig. 1) ; it is nearly black at 

 ' Dr. Cunningham's description from the lire animal. 



