REPORT ON THE PYCNOGONIDA. 57 
3 mm., whereas the length of the body of Ascorhynchus minutus is.only 6°4 mm., and 
that of the proboscis 2 mm. 
2. The abdomen of Ascorhynchus ramipes is about as long as the proboscis, while 
that of Ascorhynchus minutus is nearly one-third the length of the proboscis. 
3. On the dorsal surface the thoracic segments and the lateral processes in Asco- 
rhynchus ramipes show round knobs, in Ascorhynchus minutus distinct prickles. 
4, The four last joints of the ovigerous legs of Ascorhynchus ramipes are furnished 
with a single row of denticulated spines; those of Ascorhynchus minutus with three distinct 
rows. (I think this difference is not a real one: Béhm’s observation and description will, 
no doubt, in this respect, be found deficient.) 
5. The first true leg of Ascorhynchus ramipes is not furnished with a claw, that 
of Ascorhynchus minutus has a small, but distinct claw. 
Ascorhynchus orthorhynchus, n. sp. (Pl. V. figs. 11-13; Pl. VI. figs. 1-4; Pl. XV. 
figs. 14, 15). 
Diagnosis.—Proboscis almost half the length of the body. Abdomen not quite one- 
third the length of the proboscis. Dorsal surface with a row of prickles, also the lateral 
processes. 
Description.— 
Length of the proboscis, . 4 . : : : 0 10 mm. 
Length of the trunk, : ' ; ; ; abies ; 94 , 
Length of the abdomen, . ; : : F : : Sie Ss 
Total length of the body, . 7 : . ; : 3 224 ,, 
Length of the palpi, : . . : : . ; ee op 
Length of the third leg, . : c : A , . BO) 
Length of the ovigerous leg, - : : ’ : ; 20; 
The body of this species is very slender and almost smooth. The proboscis does 
not incline to the ventral side, and is not so much swollen as in the other species of 
Ascorhynchus, consequently the form is not pyriform, but rather club-shaped. The 
proboscis shows longitudinal furrows; the mouth is, as in the other species, triangular 
and very small (Pl. XV. fig. 14). 
The cephalothoracic segment is comparatively short, being only half as long as the 
proboscis ; the mandibles and the palpi are placed on, distinct prominences. The 
oculiferous tubercle is elevated and conical, and furnished with four distinct eyes; the 
lateral processes for the ovigerous legs are very small, those for the first pair of true legs as 
well as those for the following legs are of considerable size. The lateral processes of the true 
legs are widely separated, thus contributing to the slender appearance of the whole body, 
Posteriorly the cephalothoracic, as well as the two following segments, are consider- 
ably elevated dorsally, while the anterior part of the following segment is much narrower, 
(ZOOL, CHALL, EXP,—PART x,—1881,) K 8 
