CRUSTACEA MAIvACOSTRACA. II. 



"5 



The body is shining and its anterior half deeply reddish yellow. 



Length of the single specimen 3.0""". 



Occurrence. It has been taken at the deepest "Ingolf station. 



South-West of Cape Farewell: St. 38: Lat. 59' 12' N., Long. 51° 05' W., 1870 fm., temp. 1.3'; i spec. 



Remarks. T. ochracea differs from T. unguicillata Norm. & Stebb. especialh^ in the shape of 

 the incisive margins of the chela;, the shape of the five anterior abdominal segments when seen from 

 the side, the shape of the last segment from above and b\- possessing small pleopods. 



72. Tanaella unguicillata Norm. & Stebb. 

 (PI. XI, figs. 4a— 4 d.) 



1886. Tanaella unguicillata Norman & Stebbing, Tranact. Zool. Soc. London, Vol. XII, Pt IV, p. 118, 



PI. XXIV, fig. IV. 



Female (without marsupium). The single specimen is so strongly curved that it was im- 

 possible to straighten it without breaking. But it seems to differ slightly from T. ochracea as to the 

 general shape of the body, outline and relative length of the carapace and thoracic segments (comp. 

 fig. IV D in the English paper quoted.) 



Antennulse (fig. 4a) somewhat shorter than the carapace, but otherwise almost as in T. ochracea, 

 the most important difference being, that the second joint is proportionately a little longer and 

 cylindrical, considerably more than half as long as the first joint and a good deal longer than the 

 two distal joints together. — Antennae with a feeble articulation between fourth and fifth joints, which 

 are more than three times as long as the penultimate joint. 



Chelipeds very robust (figs. 4 a and 4 b). The basal joint not full)' as long as the carpus, very 

 deep, with the hind margin of the deep posterior protuberance very flatly convex. Carpus not quite 

 half as long again as deep. Chela somewhat longer than the carpus, distinctly less than twice as 

 long as broad; movable finger much shorter than the anterior margin of the hand, with a somewhat 

 high, triangular protuberance on the incisive margin somewhat from its base and a minute, sharp 

 denticle just beyond that protuberance (fig. 4b); fixed finger very broad, with two strong setae on its 

 posterior margin, while its incisive margin has at the base a somewhat deep and long incision cren- 

 ulated with some five or six obtuse saw-teeth, producing a small hole between the fingers when ad- 

 duced, and beyond that incision the margin is somewhat undulate to rather near the end, where a 

 very obtuse angle and beyond this a triangular incision are seen; the ends of both fingers are obtuse. 



Three anterior pairs of thoracic legs (fig. 4 a) proportionately more slender than in T. ochracea 

 and decreasing conspicuously in length from second to fourth pair; fourth and fifth joints subequal in 

 length and with the length of their spines as in T. ochracea; sixth joint much longer than the fifth 

 or the seventh with its straight claw. Three posterior pairs (fig. 4c) nearly as in T. ochracea; seventh 

 jomt with its long claw much longer than the sixth joint, finely ciliated and nearly straight or curved 

 distinctly upwards. 



Abdomen only a little shorter than the three preceding segments combined, seen from the side 

 (fig. 4d) uncommonh- thick and thickest a little before the middle. Five anterior segments short, seen 



15' 



