169 



General distribution: The typical Heteroc. aisifcr A. M.-Eclw. was discovered off 

 the island of Barbados, West-Indies, was taken by the "Blake" off the islands of St. Kitts, 

 Montserrat and Grenada and, according to S. I. Smith, occurs also off the coast of Carolina; 

 it is furthermore known from the Hawaiian Islands, where this species is one of the most 

 abundant of deep-water shrimps (Rathbun), from New Britain (Borradailk), from between the 

 Philippine Islands and Borneo (Spence Batk) and from Sagami Bay, Japan (Balss). — The 

 variety parvispina is still only known from the Indian Archipelago. 



7. Heicrocarpus Sibogae de Man. PI. XIV, Fig. 42 — 42/. 



Heterocarpns sibogae J. G. de Man, in: Zoologische Mededeelingen, uitgegeven vanwege 's Rijks 

 Museum van Natuurlijke Historic te Leiden, Dl. Ill, Afl. 4, 191 7, p. 283. 



Heterocarpns ensifer A. Alcock, Descript. Catal. Indian Deep-Sea Crustacea, Calcutta, 1901, 

 p. 107. 



Stat. 12. March 14. 7°i5'S., ii5°i5'.6E. Bali Sea. 289 m. Bottom mud and broken .shells. 



10 adult specimens, viz. 4 males and 6 females, 5 of which are ova-bearing. 

 Stat. 38. April i. 7°35'.4S., ii7°28'.6E. Bali Sea. 521 m. Bottom coral. 9 young specimens. 

 Stat. 74. June 8. 5°3'.5S., ii9°o'E. Southern entrance of Strait of Makassar. 450 m. Bottom 



Globigerina ooze. 6 specimens, viz. i adult male, i ova-bearing female and 4 



young individuals. 

 Stat. 139. Aug. 4. 0° 1 1' S., I27°25' E. North of Batjan. 397 m. Bottom mud, stones and coral. 



3 adult males and 2 ova-bearing females. 

 Stat. 212. Sept. 26. 5°54'.5S., 120° 19'. 2 E. West of Saleyer. 462 m. 2 adult females, one of 



which with eggs. 

 Stat. 256. Dec. 11. 5° 26.6 S., I32°32'.5E. Kei-islands. 397 m. Bottom greyish green mud. 



8 adult specimens, viz. 3 males and 5 females, 3 of which are egg-bearing. 

 Stat. 262. Dec. 18 5° 53.8 S., I32°48'.8 E. Kei-islands. 560 m. Bottom solid bluish grey mud, 



upper layer more liquid and brown mud. 2 adult ova-bearing females. 

 Stat 316. Febr. 19,1900. 7°i9'.4S., ii6°49'.5E. Bali Sea. 53S m. i ova-bearing female. 



This interesting new Heterocarpns, of which no less than 42 specimens were collected, 

 both adult and young, much resembles Heteroc. ensifer A. M.-Edw. (A. Milne-Edwards, Recueil 

 de Figures de Crustaces nouveaux ou peu connus, 18S3, PI. 32 and M. J. R.\thbun, in; U.S. 

 Fish Commission Bull, for 1903, Part III, Wash. 1906, p. 917, PI. XXI, fig. 7), as regards the 

 shape of the carapace and its carination, but is easily distinguished 1) \- the sharp carinae 

 of the i^'and 2"'' abdominal terga. 



Heterocarpns Sibogae attains the length of 140 mm., both male and female, while the carapace 

 and rostrum combined are but little shorter than the abdomen. In the adult species the rostrum, 

 measured in a straight line from the orbital margin to the ape.x, appears as a rule one-fifth to 

 almost one-third shorter than the carapace between the orbital and the posterior margin, 

 rarely of equal length, though never longer than the carapace (Table of .Measurements); in the 

 adult female from .Stat. 316 which is already provided with eggs, though not yet full-grown, as 

 it is only i 10 mm. long, the rostrum is 2,5 mm. longer than the carapace and in still younger 

 specimens, as in those from the Stations 38 and 74, the rostrum is distinctly, to about one- 

 third, longer than it. The postrostral crest, which commences near the posterior margin of the 

 carapace, is more or less curved, while the up[jer margin of the rostrum proper runs first 



SIIIOGA-EXPHDITIE XXXIX a'. 22 



