CARPENTER—PYCNOGONIDA. 97 
Localities. Hulule, Maldive Islands (W. reef in branching Polyzoa), one egg-bearing Oe 
male, one female. Amirantes :—Station E13 (20-25 fms.), one female; Station H 4 &Y 
(36 fms.), one egg-bearing male; Station E15 (85 fms.), four males, two with eggs ; 
Station E16 (89 fms.), one female. 
The condensed body-form, the elongate, spinose abdomen, the undivided scape of the 
cheliforus, and the prominent tubular cement-duct on the thigh of the male’s leg afford 
abundant distinctive characters for this species. In some of these characters P. pata- 
gonicum (Hoek, 1881, pp. 84-6, pl. 12. figs. 6-9) resembles it, but that pyenogon is 
without the tubular cement-duct in the male and is far larger. P. fluminensis (Kroyer), 
lately carefully redescribed and figured by Meinert (1899, pp. 52-4, pl. 5. figs. 1-6), has 
the scape of the cheliforus incompletely divided and a short outstanding tubular cement- 
duct; it differs from the present species in its more slender body, more widely separated 
lateral processes, as well as in the fourth leg-bearing segment, not fused with the third. 
In P. spinipes the vestigial palps (Pl. 12. figs. 5, 6) bear short spines and show (in 
the male) a trace of segmentation. The reduction of the oviger in the female (compare 
figs. 5, 6) is striking, and its apparent eight-segmented condition is clearly due to the tenth 
segment not being separated from the ninth nor the eighth from the seventh (fig. 7). 
The condition of this limb indicates how the reduction in the number of segments, so 
often noticeable in the oviger of the female or of both sexes in this order, may have been 
brought about. The characteristic tubular cement-duct on the thigh of the male’s leg 
varies in form in different individuals, being sinuous (fig. 8) or straight (fig. 9). Its 
outer surface is transversely wrinkled (fig. 8). Viewed in optical section (fig. 9) it is 
seen to be formed by an outgrowth of the cuticle and to be traversed by the slender duct 
which arises from a reservoir in close connection with the reniform gland. 
Several of the males in the collection carry eggs. These are closely packed in a 
trilobate mass, held by the terminal segments of the oviger (fig. 2). In the male figured 
a number of young larve also are loosely attached to the proximal segments of the 
oviger. Examination of these shows them to possess the typical form of a pycnogonid 
larva (fig. 12) with very elongate and slender cement-ducts arising from the basal 
- segment of the cheliforus and the two succeeding appendages. The third segment of 
these latter is fringed with a beautiful series of delicate bristles, such as are figured for the 
larva of Barana castelli (Dohrn, 1881, Taf.1. fig. 18). The larva of Pallenopsis spinipes 
does not resemble closely the larvee of various species of the genus that have been 
figured by Meinert (1899), but rather recalls those of Pycnogonum littorale (Meinert, Z. ¢. 
pl. 1. fig. 3) and of various Nymphonide. 
ANOPLODACTYLUS, Wilson. 
2. Anoplodactylus pulcher, sp. nov. (Plate 12. figs. 13-19.) ~ 
Length of male 2°2 mm. (including proboscis). 
Body concentrated, with the two hinder leg-bearing segments fused and the lateral 
processes elongate, bearing long spines (figs. 13, 14). Abdomen nearly half as long as 
body, slender and erect (fig. 14). Eye-eminence prominent and subcylindrical, with 
eyes near the summit (fig. 14). Proboscis nearly half as long as the body, stout and 
SECOND SERIES.— ZOOLOGY, VOL. XII. 14, 
