﻿CRUSTACEA MALACUSTRACA. ac 



Remarks. Accordiiiq- lo Alcock an c.\o])0(l is well (k-vcloped on llie external niaxillipeds of 

 Engystc7iopiis and RiclttirdiiKi. wliile it is quite rudinientarv in Spougicola (in S. Kocldcri Canllery I 

 have l)een nnable to find e\en a rudiment); in S/n/ofins tlie tliird niaxillipeds possess an exopod. The 

 new genus Spoiigico/oidcs is more allied to Spoiigicolu than to the three other genera in ha\iiig no 

 exopod on tlie third niaxillipeds, but it differs sharply from all in having no exopod on the second niaxilli- 

 peds (according to my own obscrxation Spoiigicold has a well de\eloped exopod on iiixp^). In Spongi- 

 coloides the shape of the carpus and the chela of the third pair of trunk-legs is nearly similar to that 

 in Richardiiin — consequently very different from Spongicola and Juigysiciiop/is — but in Richarduia 

 the distal joints in the two posterior pairs of trunk-legs are again divided into joints, while thev arc 

 undivided in Spongicoloidcs. But tlie branchial formula differs extremeh' from what is found in the 

 other genera named. These possess two arthrobranchite and an epipod on iiixpi and /;-/' to tri\ but 

 in Spongicoloidcs the same five pairs of appendages have only a single arthrobranchia (the anterior 

 being absent), and besides //•/' to ///• have no epipod. Fiuall\-, in Spongicoloidcs the branchite of the 

 truuk-legs are less developed, with their branches much shorter (PI. IV, fig. i i) than for instance in 

 Spongicola. — In general aspect this interesting new genus shows more resemblance to Ricliardina 

 (according to Alcock's figure of that form) than to an\- of the other genera. 



37. Spongicoloidcs profundus, n. sp. 



PI. Ill, fig.s. 5 3-5 k; PI. IV, figs, i a— il. 



Description. The carapace, which is of very thin texture, is moderately short, slightly com- 

 pressed and dorsally vaulted, with a number of small spines scattered on the anterior two thirds of 

 the dorsal surface and on the anterior third of the lower part of the sides. The rostrum, which reaches 

 only to the end of the basal antennular joint, is irregularly serrated above (figs. 5b, 5c, 5d), in two 

 specimens with respecti\el\- three and two, in a third specimen with no spines on the lower edge 

 behind the acute tijs. The eyes are of moderate size, with whitish pigment; the short e}e-stalks ha\-e 

 no spines. 



The antennal squama (fig. 5 f) is slightly more than twice as long as broad; the distal half or 

 two fifths of its outer margin has 4 — 6 teeth, and the arched front margin overreaches the apical 

 marginal spine. Third niaxillipeds somewhat shorter than /;-/■; their ischium and merus distinctly 

 broadened. 



The first three pairs of trunk-legs are truly chelate, b'irst ]>air (figs, i d and i e) slender, 

 shorter, slightly more than half as long as the third pair; second pair oiih' a little shorter than the 

 third, reaching about to the base of its movable finger, but its distal half is much more slender than 

 that of the third pair. Tliird pair (fig. i f) with the carpus somewhat iiu)re than twice as long as 

 broad; the chela is nearly as long as the sum of ischium, merus and carpus, besides extremely slender, 

 being 51/2 times as long as broad. Fourth and fifth pairs of legs (fig. i g) have the carpus even a 

 little more than twice as long as the propodus, and both joints show no vestige of subdivision; the 

 terminal part of these legs is shown in fig. i li. 



The abdomen is smooth, only the telson has two considerably diverging longitudinal rows of 



