MACROPODIA TENUIROSTRIS. 
Tab. XXIII. Fig. 1, 2 . 3, 4 , ct 5. 
M. rostro longissimo tenui; antennis rostro sublongioribus; testa pone rostrum tuberculis 
duobus spinaque unica in triangulum dispositis; brachiis interne spinulosis. 
Leptopodia tenuirostris. Leach Edinb. Encycl. vii. 431. 
Macropodia tenuirostris. Leach Trans. Linn. Soc. xi. 331. 
Fig. 1, Mas. 2, Maris abdomen. 3, Feminas abdomen. 4, Feminas pes anticus. 
5, Pedipalpus geminus externus. 
I first observed this species amongst some Crustacea collected at Torquay,, in Southern Devon, 
by Hooker, and have since found it a very common inhabitant of all the deep water off the coast 
of that country, especially in the Sound of Plymouth. 
It may be readily distinguished from the following species, by its spinulose arms, and long 
and slender rostrum. 
MACROPODIA PIIALANGIUM. 
Fig. 6. 
M. rostro acuminato antennis multo breviore; testa pone rostrum tuberculis tribus triangulum 
delinientibus : postice majore ; brachiis interne subscabrosis, hirsutis. 
Cancer Phalangium. Penn. Bril. Zool. iv. 8. 
Maccuttoch Trans. Linn. Soc. vi. 389. tab. 31. 
Macropus longirostris. Lair. Gen. Crust, ct Insect, i. 39. 
Maja Phalangium. Leach Edinb. Encycl. vii. 395. 
Zool. Miscel. ii. 18. 
Trans. Linn. Soc. xi. 331. 
Leptopodia phalangium. Leach. Edinb. Encycl. vii. 431. 
Fig. 6, Mas. 
This species is very common in the mouths of rivers and in estuaries throughout the greater 
part of Britain, being well known by the popular appellation of Spider-crab. It has been 
observed by Dr. Macculloch to be sometimes covered by fragments of a species of the Liunean 
genus Focus, which are attached to its body and legs. 
