42 I 



2. Ancistrosyrinx pulchella n. sp. PI. XXVII, fig. 6. 



Stat. 137. Channel between Makjan and Halmahera. 472 M. Fine, dark, muddy sand. 1 Spec. 

 Stat. 159. o°59'.iS., i29°48'.8E. Halmahera-sca. 411 M. Coarse sand. 2 Spec. 



Shell fusiformly pagodaeform, strongly keeled, yellowish-brown, lighter on the canal, 

 with a narrow whitish zone below the periphery and another at the fasciole. Whorls 1 1 , of 

 which nearly 2 form a smooth, convexly-whorled nucleus, subsequent upper whorls nearly smooth, 

 but with a strong keel, which is at first spinous, the spines being horizontally spreading, but 

 soon become more or less upturned and have the character of erect trigonal spines, on the 

 following 3 whorls, spreading again on last one ; spines about 20 in number on last whorl. 

 Upper part of these whorls concave, the fasciole smooth, but for fine growth-lines; this fasciole 

 is bordered on the lower whorls by a liration, and the space between this and the spinous 

 keel is faintly 2- or 3 lirate, the space between the keel and lower suture of whorls is con- 

 spicuously grooved, grooves 10 in number on penultimate whorl, about 38 on last one, where 

 some of the upper and many of the basal ones have still intermediate lirae, lacking on the 

 penultimate and older whorls. On the last part of last whorl, the shell is still sculptured by 

 strong growth-lines, which, in crossing the interspaces or lirae between the grooves make them 

 granulous. Last whorl contracted below its periphery, ending in a long, straight canal, which 

 is strongly attenuated towards its base. Aperture elongately subtriangular, its upper margin 

 nearly horizontal, with a deep, rather narrow sinus; outer margin joined to the upper one at 

 a somewhat sharp angle, then slightly convex, thin, slightly fringed, columellar margin concave 

 along the body-whorl, then running straight in the rather wide, long, nearly rectilinear canal, 

 with a strong layer of white enamel on its whole length. Interior of aperture smooth, perhaps 

 slightly grooved at its right margin. 



Alt. 25, lat. 9 a / 2 ; apert alt., with canal 13, lat. 3 Mill. 



This species may be readily distinguished from the preceding one by its sculpture, con- 

 sisting of deep grooves between flat lirae, of which no tracé in the type of A. travancorica in 

 lower part of whorls, and even in the var. granulata, the granules are separated by shallow 

 striae ; the spines of a whorl are more numerous in that species and seem to be less pointed, 

 though this latter difference may .be due to the state of preservation. Mr. Melvill has (Proc. 

 Mal. Soc. Lond. Vol. VI, 1904, p. 56, PI. 5, fig. 3) afterwards described another species, 

 A. orientis, from the Gulf of Oman, which, as that author presumes, seems to be in very 

 juvenile condition ; even in that juvenile state, it differs from my species by its much stronger 

 spines and sculpture, as may be clearly seen by comparison with the young specimen from 

 Stat. 137, which has a length of 9.5 Mill. and has already the spiral sculpture and 17 spines 

 on keel of last whorl. 



Surcula H. & A. Adams. 

 1. Surcula symbiotes Wood-Mason & Alcock. 



Wood-Mason & Alcock. Ann. Mag. Nat. Hist. Ser. 6, Vol. VIII, 1S91, p. 444, fig. 13 <?,/;. 

 SMITH. Ann. Mag. Nat. Hist. Ser. ö, Vol. XIV, 1894, p. 161, PI. 3, fig. 7, 8. 



57 



SIBOGA-EXPEDITIE XLIx't'. 55 



