19 



The teeth stand in a single series on both jaws, and are 

 short, subulate, slightly incurved, becoming gradually 

 smaller towards the corners of the mouth. The vela are 

 thickly covered with soft, perforated, granular eminences. 

 The length of the head is contained thrice and three quar- 

 ters in the total length of the fish, which is 4^ inches. 



Had. The Falkland Islands. 



NOTOTHENIA TESSELLATA. Richardsou. 



Ch. Spec. N. squamis leevissimis : capite squamoso ; cor- 



pore sex-fasciato ; pinnd dorsi tessellatd. 



Radii :— Br. 6; D. C|— 33 ; A. 32 ; C. 21 ; P. 22 ; V. 1|5. 



Plate XII., figs. 1, 2, natural size. 



This species has a more extensively scaly head than any 

 of the NotoihehicB described in the preceding pages. The 

 scales cover the top of the head forward nearly to the 

 nostrils, two-thirds of the cheek, and the whole of the gill- 

 cover, except a narrow margin, which is smooth. The 

 limb of the preoperculum, the whole interoperculum, the 

 preorbitar, end of the snout, maxillaries, jaws, and under 

 surface of the head are also smooth. The opercular scales 

 are larger than the others on the head. The scales on the 

 body are small as compared with those of the other Noio- 

 IhenicB, there being about eighty in a row between the gill- 

 opening and caudal fin. These scales are quite smooth on 

 the edge, no teeth being visible through an eye-glass of 

 considerable power. They are bounded by four slightly 

 convex curves, and one taken from the middle of the side, 

 showed thirteen furrows impressed on the basal half. When 

 ill fsitii, they are invested with a tliick epidermis, which 

 renders their edges blunt, and they feel smooth to the fin- 

 ger drawn either way over them. 



The lateral line is traced on scales which are notched 

 at the tip, and have two pores on the disk, without any 

 visible tubular ridge. The upjjer line can be traced con- 

 siderably past the commencement of the lower one. The 

 pores of the head are in the same situations as in the other 

 species. The free edge of the united gill-membranes is 

 curved in the arc of a circle. The length of the head is 

 contained three times and a half in the whole length of 

 the fish. Both jaws are armed with a row of subulate 

 teeth, similar to those of the other species, with two or 

 three much smaller ones behind the front teeth, and curved 

 backwards. The tongue, large and smooth, has a free, 

 rounded tip. The upper and lower vela are glandular. 



The original tints have perished during the immersion 

 of the specimen in spirits, but six irregularly wedge- 

 shaped bars can be traced, descending from the back down 

 the sides. The fins generally have a dark ground. The 

 first dorsal is, as usual, mostly deep black, and the second 

 is barred with rows of square spots. 



Length, seven inches. 



Hab. The Falkland Islands. 



NoTOTHENiA siMA. Richardson. 

 Ch. SPEC. N. capite depressiiisculo parum convexo, squa- 

 moso ; corpore Jasciatim nebuloso ; squamis ciliatis. 

 Radii:— Br. 6; D. G|— 28 ; A. 28; C. 13|; V. 1|5. 



Plate XT., figs. 1, 2, natural size. 

 This Notothenia\ia.s an extensively scaly depressed head. 



The cheek is thickly covered with small scales, excc])t 

 about one-third of it, next to the corner of the mouth, 

 which is naked. On the temples and supra-scapular re- 

 gions the scales are minute ; on the top of the head and 

 opercula they are larger and more deeply imbedded in the 

 skin, and their form and disposition are less regular be- 

 tween the eyes. Most of the scales on the body are 

 ciliated. A row of open pores runs along each limb of 

 the lower jaw, round the preoperculum, along the najie, 

 across the upper edge of the gill-cover, round the orbits, 

 and over the end of the snout, as in most of the other 

 species. 



The length of the head is contained thrice and two- 

 thirds, and the height of the body five times and three 

 quarters in the total length. The space between the eyes 

 is narrower than the breadth of the orbit. The teeth are 

 all short, and in front of the jaws are disposed in several 

 rows. 



The original colours of the fish have faded, but some 

 dark marks still exist on the cheek and temples. On the 

 upper parts of the body and sides the dark tints have a 

 clouded and banded form. There are dark marks on the 

 base and towards the extremity of the caudal, and some 

 obscure spotting on the other two vertical fins, with a 

 darkening of the membrane near the tips of the rays. The 

 pectorals are obscurely banded ; a few spots exist on the 

 ventrals, and the first dorsal exhibits the usual black mark. 



Length, A\ inches. 



Hab. The Falkland Islands. 



Harpagifer BisriNi>s. Vide Y>. 11. 



Ch. spec. H. corpore auraviiaco, fasciis irihus fuscis 

 ciiicio ; capite Jusco. 



Radii :— B. 6; D. 4|— 22vel 24 ; A. 17; C. 114; P. 17; 

 V. l;5. 



Plate Vll., figs. 1, 2, 3. Plate XII., fig. 8, natural .size, 

 fig. 9, magnified. 



The specimens from which the geneiic characters and 

 the detailed description of the species were given in the 

 preceding fasciculus, as referred to above, had been much 

 injured by immersion in brine, and the patterns of colour 

 had nearly perished. Through Mr. Gray's kindness, I have 

 had an opportunity of examining specimens well preserved 

 in spirits, and of making some additions to the account of 

 the species. 



The first dorsal in reality contains four spines, the last 

 spine being, in some examples, much more conspicuous 

 than in others. By a re-examination of Sir James Ross's 

 specimens, I detected the fourth spine concealed under 

 the integuments. 1 he last ray of the dorsal and anal is 

 bound down to the tail by membrane, which extends nearly 

 to the base of the caudal. A row of pores runs along 

 each limb of the lower jaw, and round the edge of the 

 preoperculum to the temples. Another crosses the end ol' 

 the snout, follows the edge of the preorbitar, completely 

 encircles the eye, then continues along the union of the 

 gill-cover with the skull, and, crossing the nape, unites 

 with its fellow. All these pores have elevated tubular 



d2 



