83 



species described by Col. Alcock should indeed prove to be identical with that which was 

 collected by this expedition, the variety Sibogae should also occur in the Gulf of Manar and 

 in the Bay of Bengal (Alcock). 



3. Nematocarcinus undulatipes Bate. PI. VIII, Fig. 20 — 20 h. 



Nematocarcinus undulatipes C. Spence Bate, Report Challenger Macrura, 1888, p. 801, PI. CXXX. 

 Nematocarcinus undulatipes \V. T. Calman, in: Guide to the Crustacea, Arachnida etc. exlii- 



bited in the Department of Zoology, British Museum (Natural History), London 1910, p. 52, 



Fig. 32 (photograph of a mounted specimen). 

 Nematocarcinus paucidentatus C. Spence Bate, 1. c. p. 816, Plate CXXXII, Fig. 9. 

 Nematocarcinus cursor A. Alcock, Descr. Catal. Indian Deep-Sea Crustacea. Calcutta 1901, p. 89. 

 Nematocarcinus cursor, var. paucidentatus A. Alcock, 1. c. p. 90. 



Stat. 45. April 6. 7 24' S., ii8°15'.2E. 794 m. Bottom fine grey mud, with some radiolariae 



and diatomes. 1 male and 1 young specimen which is badly damaged. 

 Stat. 88. June 20. o°34'.6N., II9°8'.5E. 1301 m. Bottom fine grey mud; trawl chiefly brought 



up yellow mud. 1 young specimen. 

 Stat. 101. June 30. 6°I5'N., i20°2i'E. Sulu Sea. 1270 m. Bottom fine grey mud (Globigerinae). 



1 adult female without eggs. 



Stat. 122. July 17. i°58'.5N., i25°o'.5 E. 1264 — 1 165 m. Bottom stone. 3 males. 



Stat. 173. Aug. 28. 3°27'S., I3I ? o'.5 E. 567 m. Bottom fine, yellow grey mud. 3 males. 



Stat. 262. Dec. 18. 5°53'.8S., I32°48'.8 E. 5Ó0 m. Bottom solid bluish grey mud, upper layer 



more liquid and brown mud. 28 specimens, viz. 22 ova-bearing and 3 younger 



females, 1 male and 2 very young specimens. 

 Stat. 314. Febr. 17, 1900. 7 36' S., U7°30'.8E. 694 m. Bottom fine, sandy mud. 1 male and 



2 young females. 



Stat. 316. Febr. 19, 1900. 7 19'. 4 S., u6°49'.5 F. 538 m. Bottom fine, dark brown sandy mud. 

 4 young specimens. 



At first I did hesitate to refer these specimens to Xcmat. undulatipes of the Report on 

 the Challenger Macrura, because the legs of the i st and 2 nd pair do not agree with Bate's figure 

 on Plate CXXX, as regards the proportion between the length of chela and carpus: according 

 to that figure the chela of the i st pair should measure half the length of the carpus, while the 

 chela of the 2 nd pair should be even slightly longer than one-third of that joint. My presumption, 

 however, that these legs are figured inaccurately, proved to be right, for, having applied to 

 him for this question, Dr. Calman has very kindly examined for me the type specimens of 

 this species and wrote me the following : 



"A good many of the Challenger specimens of Nematocarcinus undulatipes have lost the 

 first two pairs of legs. The largest specimen from Station 200 (off Sibago) is a female measuring 

 about 93 mm. in total length and is in this condition. In a female (ovigerous) of more than 

 86 mm. (telson broken) the first legs extend beyond the antennal scale by less than one-third 

 of the carpus; the carpus of first legs measures 16 mm. and the chela 4,5 mm.; in the second 

 legs the carpus measures 30,5 mm. and the chela 4,5 mm. In an ovigerous female of 80 mm. 

 total length the first legs have the carpus measuring 13,75 mm - an d the chela 4 mm.; the 

 second legs are wanting. The specimen from Station 194 (off Banda Island) has lost both first 

 and second leg's''. 



These measurements now fully agree with those of the specimens of this collection 



