REPORT ON THE PYCNOGONIDA. 59 
affinity with any of the other forms of Ascorhynchus described. Judging from the shape 
of the proboscis, it comes nearest to some of the species of Colossendeis. Yet in that 
genus the mandibles in the full-grown animal have totally disappeared, whereas Ascor- 
hynchus orthorhynchus in all probability has these appendages in the adult state. I 
do not believe, however, as I have said before, that this difference is in reality very 
important, especially since I have observed among the specimens of Colossendeis gracilis 
one furnished with long three-jointed mandibles, while these appendages were totally 
wanting in the other specimens of the same species. 
Oorhynchus, n. gen. 
Diagnosis.—Proboscis ovate, inserted ventrally on the cephalothorax at a con- 
siderable distance from the front margin. Mandibles rudimentary; palpi nine-jointed. 
Ovigerous legs ten-jointed, the four last joints not furnished with one or more rows of 
denticulate spines. 
Oorhynchus aucklandie, n. sp. (Pl. VIL. figs. 1-7). 
Diagnosis —Oculiferous tubercle horizontally directed forwards. Mandibles repre- 
sented by single-jointed club-shaped bodies. First tarsal jomt of the legs extremely small, 
auxiliary claws wanting. Abdomen very long, once and a half as long as the proboscis. 
Description.— 
Length of the proboscis, ; . : ¢ : , j 1 mm. 
Length of the cephalothorax, j : C ; : ? OA) a 
Length of the trunk, ; : : 3 c 5 3 ES cn 
Length of the abdomen, : é : : : . c 1195) rp 
Total length of the body, . : 5 : ; 6 ‘ 4:2 ,, 
Length of the leg, . : : ; . : : 2 5°5 ,, 
This very curiously-shaped Pycnogonid has the cephalothoracic segment short but 
very broad, furnished at the front with a long cylindrical oculiferous tubercle which 
projects horizontally beyond the extremity of the proboscis. The oculiferous, tubercle i is 
furnished with four eyes, two placed dorsally, and two ventrally; the latter two are 
the smaller. The cephalothorax is armed at the two corners with curiously-shaped spines 
also projecting forwards, and above the attachment of the first pair of legs bears a couple 
of long hairs placed on small knobs. Similar pairs of hairs or thin spines are also 
observed on the two following thoracic segments on the dorsal surface between the lateral 
processes for the insertion of the legs. The rest of the surface of the body is entirely 
smooth. ‘The three thoracic segments are small, and the lateral processes are separated 
by small intervals. The abdomen, on the contrary, is very long, being once and a half 
as long asthe proboscis. The abdomen shows on both sides a row of poipaaeale long 
and projecting hairs. 
