REPORT ON THE PYCNOGONIDA. (ill 
Colossendeis medic, n. sp. (Pl. X. figs. 10, 11). 
a half the length of the proboscis ; ninth joint 
not attached tara to the eighth; together they are as long as the tenth joint. 
Denticulate spines of the four last joints of the ovigerous legs in five distinct rows. 
Legs not quite three times as long as the body. Otherwise this species resembles the 
foregoing. 
Description.— 
Length of the proboscis, . : 5 : : r , 74 mm. 
Length of the trunk, ; : ; : : : 64 
Length of the abdomen, . F ; : é : ; ee eA 
Total length of the body, . : : i ; : ( 154, 
Length of the palpus, 5 4 ; é . ; oo Ne 
Length of the ovigerous leg, - ‘ . . 3 PAV) pp 
Length of the leg of the third pair, : 3 : ; : 454 ,, 
This species is nearly of the same shape and the several parts show almost the same 
proportions as in Colossendeis gracilis, Hock. The only differences are the follow- 
ing :— 
1. The palpi are longer, and of the three last joints the very small eighth joint does 
not bear the following joint laterally, but quite in front (Pl. X. fig. 10). 
2. The denticulate spines of the ovigerous legs (of the four last joints) are placed in 
five distinct rows. They are small with the exception of those-of the outermost row, 
which are a great deal larger. These spines have the flattened shape of those of other 
species of Colossendeis, Those which are not broken, show on the margin very small 
hairs. 
3. The legs are not quite thrice as long as the body. The fourth joint is twice as 
long as the sixth. The claw is longer than the second tarsal joint. ‘The two tarsal joints 
are about the same length, together they are as long as the body. 
The body and legs are almost entirely smooth; when seen with the microscope very 
short hairs are to be observed; those on the palpi are a little stronger. On the second 
joint, on the ventral surface, of every leg very small genital pores are to be observed. 
However, as the two specimens of this species probably are not quite adult, I could not 
determine to which sex they belong. 
Habitat.—This species was dredged at Station 298. November 17, 1875. Lat. 
34° 7’S., long. 73° 56’W. Depth of the sea, 2225 fathoms. Bottom temperature, 1°3° C. 
Bottom of the sea, grey mud. os, 
Observations.—This species is nearly allied to Colossendeis gracilis. However, as the 
differences I have pointed out are present equally in both specimens, I cannot consider 
them identical with that species. 
